This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M. The assessment for this resource was completed, within Scientific Council during autumn 2011. Scientific Council recommended that the fishing mortality for 2013 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2012 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011 and 2012, due to the moratorium initiated in 2011. The biomass estimates (EU survey summer 1988-2012) are updated within this report. In the 2011 EU survey the 3M total and female biomass index were 1041t and 850 t respectively. These indexes were around 37% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a high level of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2011

Casas-Sánchez, J.M. (José Miguel)

English

This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2009. The indices of biomass in the July 2009 survey showed a sharp decline, confirming recent downward trends, even though the levels of exploitation have been low since 2005. The estimate of stock size was below Blim and it has entered the collapse zone defined by the NAFO PA framework, and recruitment prospects remained poor. Therefore, Scientific Council recommended  that the fishing mortality for 2010 and 2011 be set as close to zero as possible. The catch table (to September 2010) and biomass estimates (EU survey summer 1988-2010) are updated within this report. Preliminary data indicate that 5286 t of shrimp was taken in 2009 against an annual TAC of between 18000 and 27000 tons. In the 2010 EU survey the 3M total and female biomass index was 4894 and 3819 t respectively. These indexes were 75% higher than last year and although they were still low compared to historical average they are now above Blim. This new situation makes necessary the revision of the recommendation carried out within Scientific Council during autumn 2009

Repositorio Institucional Digital del IEO

  NOT TO BE CITED WITHOUT PRIOR  REFERENCE TO THE AUTHOR(S)   Northwest Atlantic Fisheries Organization  Serial No.  N5816 NAFO SCR Doc. 10/047  SCIENTIFIC COUNCIL MEETING – SEPTEMBER 2009  Division 3M Northern shrimp (Pandalus borealis) – Interim Monitoring Update By  J.M. Casas Sánchez  Abstract  This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2009. The indices of biomass in the July 2009 survey showed a sharp decline, confirming recent downward trends, even though the levels of exploitation have been low since 2005. The estimate of stock size was below Blim and it has entered the collapse zone defined by the NAFO PA framework, and recruitment prospects remained poor. Therefore, Scientific Council recommended  that the fishing mortality for 2010 and 2011 be set as close to zero as possible. The catch table (to September 2010) and biomass estimates (EU survey summer 1988-2010) are updated within this report. Preliminary data indicate that 5286 t of shrimp was taken in 2009 against an annual TAC of between 18000 and 27000 tons. In the 2010 EU survey the 3M total and female biomass index was 4894 and 3819 t respectively. These indexes were 75% higher than last year and although they were still low compared to historical average they are now above Blim. This new situation makes necessary the revision of the recommendation carried out within Scientific Council during autumn 2009.   UE Bottom Trawl Research Survey Trends   Summer multi-species research surveys have been conducted onboard the Spanish vessels R/V Cornide de Saavedra since 1988 and R/V Vizconde de Eza since 2003. From 1988 to 2002 the indexes estimated by the R/V Cornide de Saavedra were calibrated and transformed to the R/V Vizconde de Eza following the Warren’s method. Fishing sets of 30 minute duration, with a tow speed of 3 knots, were randomly allocated to strata covering the Flemish Cap Bank to a depth of 1462 m since 2004, with the number of sets in a stratum proportional to its size (Figure 2).  Both vessels used the same gear (Lofoten) with a codend mesh size of 35 mm. In order to obtain information about the juvenile fraction of the stock, since 2001 a bag with 6 mm mesh size was attached to the cod-end of the Lofoten gear. SIMRAD ITI and SCANMAR sensors were employed to monitor net geometry. Details of the survey design and fishing protocols are outlined in (Casas, 2008).  In 2010 the number of tows planned was lower than previous years due to economic problems. Anyway all strata were sampled properly.  The increasing of biomass from 1988 to 1992, coincided with a period of time where there was not a directed fishery to shrimp and the cod stock began to decline. With the beginning of the shrimp fishery in 1993 the biomass declined up to 1997. After that from 1998 to 2008 the stock recovered reasonably well although with high annual variability (historical maximums in 2002 and 2005 were followed by years with lower biomass but at a relative high level). In 2009 the biomass decreased to values between the lowest of the historical series. The total and female biomass 4894 t and 3819 t respectively estimated in 2010 (Table 1), show an increase about 77 % compared to 2009. Despite this increase the values of biomass are still among the lowest recorded in the total of the historical series . This low values are likely associated to the increase of the cod stock experimented in the last years (Figure 2).  Biomass estimated by depth strata from 1988 to 2009 is shown in Table 2. The presence of shrimp in shallowest strata, with depths less than 140 fathoms (257 m), was scarce in the first years (1988-1995). However, since 1996, a noticeable amount of shrimp occurred in these strata and the estimated biomass increased up to 2002 and 2003 years where the 36 % and 40% respectively of the total biomass were estimated in depths lesser than 140 fathoms. After these years the biomass estimated in these depths declined each year and in 2008, 2009 and 2010 they were residual 2  (about 0.4 %, 2.4 % and 2.1% of total biomass respectively). The figure 3 shows this evolution between the years 2005-2010.   As in previous years the youngest specimens (age 1) didn’t appear in the catches and  the abundance at age 2 were weakly presents  suggesting the absence of any strong year classes since 2003. (Fig. 4)  Considering the abundance at age 2 as indicator of recruitment, the number of shrimp of two years old in the survey and from juvenile bag (Fig. 5) were estimated and the index average-weighed. Since 2005, both indices showed low values indicating the sequence in the last years of weak year classes . This trend continues in 2010 with a further drop in the value of both indices.  Fishery and Management  Catch trends  The fishery for northern shrimp at Flemish Cap began in the spring of 1993 and has since continued with estimated annual catches (as estimated by STACFIS, Table 3 and Figure 6) of approximately 26000 t to 48000 t in the years 1993 through 1996.  After 1996 the catches were lower and rising slowly from 26000 t in 1997 to 53000 t in 2000 and 2001.  There was 50000 t taken in 2002. The catch increased in 2003, reaching the highest value in the catches series (64000t), declining in the following years to about 5286 in 2009. Removals to September 2010 (about 1100 t) are lower than the reported in 2009 for the same period and much lower than usually reported in previous years.   Exploitation rate Considering the Exploitation rate estimated as nominal catches divided by the EU survey biomass index of the same year (Figure 7 and Table 4), this was high in the years 1994-1997 when biomass was generally lower. In the years 1998-2004 the catch rate has been rather stable at a lower level. From 2005 to 2008 despite the exploitation rate remains stable at relative low values (between 1.9-1.5), the UE survey indexes estimated decreased year after year and in 2009 the estimated biomass was the second lowest of the historical series in the EU survey. The preliminary exploitation rate to 10 September 2010 remains low, but this is not based on projected catches and it will increase slightly when the total catch for the year is known.  Effort and TAC regulation During 2009 meeting, Scientific Council (NAFO 2009) noted the stock was below Blim , it was within the collapse zone defined by the NAFO PA framework, and recruitment prospects remained poor. To be consistent with the precautionary approach, fishing mortality should be kept as close to zero as possible when a stock is in the collapse zone. Therefore, Scientific Council reiterated its September 2009 recommendation for 2010 that the fishing mortality be set as close to zero as possible. Scientific Council recommended that fishing mortality in 2011 be set as close to zero as possible.  In the light of new information from EU Survey summer in 2010, although the stock is at low levels it is now out of the collapse zone. Also the recovery of the cod stock in recent years coinciding with the decline of shrimp stock suggest that this drastic decline of the shrimp biomass may also not be related only to fishing mortality. Annual catches in 2011 around 6500 tons would produce exploitation rates that not exceed the exploitation levels that have occurred from 2005 to 2008 corresponding with medium biomass values . However, because the stock level is now much lower than then this catches should be considered as maximums catches to estimate the exploitation level for 2011 and 2012.     Conclusions  Preliminary data indicate that 1087 t of shrimp had been taken in the 3M shrimp fishery by September 2010 and it is unlikely that the catches in 2010 exceeded those taken by the end of December 2009 (5286 t.).    The low values of the Total and Female biomass index in 2009 continues in 2010 confirming the strong decrease of this stock caused by the weak recruitments in the last six years and the increase of cod stock, one of their most important predators.  3  Based on the information available in October 2009 Scientific Council reiterated its September 2009 recommendation for 2010 and 2011 that the fishing mortality be set as close to zero as possible. However in the light of new information from EU Survey summer in 2010, although the stock is at low levels it is  now out of the collapse zone and the advice ought to be revised.      References   Casas, J. M. 2008. Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2007. NAFO SCR Doc.08/ 68, Serial No.N5600  NAFO. 2009.  Scientific Council Meeting, 21-29 October, 2009.  Appendix IV. Formulation of advice.   4  Table 1. Total and Female Biomass (tons) of shrimp estimated by swept area method in the years 1988-2010 on EU Flemish  Cap surveys.    Year Total Biomass (tons) Female Biomass (tons) Valid Sets Number* 1988 5615 4525 115 1989 2252 1359 116 1990 3405 1363 113 1991 11352 6365 117 1992 24508 15472 117 1993 11673 6923 101 19941 3879 2945 116 1995 7276 4857 121 1996 10461 5132 117 1997 7449 4885 117 19982 39367 11444 119 1999 24692 13669 117 2000 19003 10172 120 2001 27204 13336 120 2002 36510 17091 120 2003 21087 11589 177 2004 20182 12081 177 2005 30675 14381 176 2006 16235 11477 179 2007 17046 12843 176 2008 11092 8630 166 2009 2797 1764 178 2010 4894 3819 153  *Since 2003 the area surveyed and strata number increased up to depths from 740 to 1450 m. increasing proportionally the number of sets.    Table 2.  Total shrimp biomass estimated by strata (tons) in the years 1988-2010 from EU Flemish Cap surveys. Between 1988 and 2002 data were transformed by Warren’s method. (cells with 0 values corresponding to strata with biomass lower than 0.5 t; empty cells corresponding to strata with biomass = 0 t.)   Stratum (Fathoms) 1988 1989 1990 1991 1992 1993 19941 1995 1996 1997 19982 1999 2000 2001 2002 2003 2004  2005  2006 2007 2008 2009 2010 1 70-80                3 0   0     2 81-100           175   69 112 690 217 164 8 50 0 0 1 3 101-140    10     148 39 639 450 1486 2169 5527 1817 2107 1023 477 20 11 36 21 4 101-140           239 596 306 1099 1942 637 785 2395 1195 11 1 3 15 5 101-140     8    26 110 1107 1948 2135 2782 2445 3780 867 695 664 558 11 28 21 6 101-140    32 2 5  20 422 161 2915 1142 657 2112 2951 1667 1250 883 299 462 23 1 43                           7 141-200  30 400 1265 3763 2704 117 506 1336 988 4056 3072 2213 3006 4632 1521 3108 2607 1370 1642 468 32 495 8 141-200   88 248 1662 826 4 248 676 393 2402 2507 1140 2900 4257 1110 2043 4585 3084 709 1938 308 326 9 141-200 133 69 35   135  613 459 412 3981 1139 1110 1483 1754 819 673 583 1435 1277 1159 48 235 10 141-200 275 75 321 2103 3235 1778 752 1315 1148 1099 7186 4052 2771 3760 3748 4685 2489 2447 614 3248 671 154 467 11 141-200 263  148 1144 4096 1335 447 650 1235 1018 6049 3017 3005 4091 3460 3003 2350 2284 1086 2878 368 174 712                           12 201-300 2170 505 512 2361 4654 2115 636 1201 1295 1195 2042 2127 1082 845 1468 378 1222 1510 1524 1965 1585 569 1060 13 201-300  66 64 89 38 136  28 687 554 1580 1465 43 620 217 23 230 689 691 373 1080 149 80 14 201-300 618 375 623 995 2543  679 792 1076 426 3034 1717 689 843 2014 303 726 2155 923 1481 1593 215 305 15 201-300 963 451 855 2004 3605 2292 1078 1370 1278 478 2575 1156 1753 837 1108 483 993 1039 1539 1597 1944 649 824                           16 301-400 777 253 355 179 420 139 49 57 237 168 515 172 464 375 506 92 696 1099 840 526 136 145 188 17 301-400      35         3   5 196 56 33 2  18 301-400      175   43 9   6  44  42 42 115 8 10 3 20 19 301-400 134 359  792 388  118 467 397 404 887 109 121 229 311 61 366 402 173 187 61 278 77                          20 401-500                 6 250 29 20 7 1 0 28 401-500                 52 130 175 54 71 26 6 33 401-500                  5  0 0 7                           21 501-600                  0   0 0  34 501-600                  13  0 1 0  29 501-600                       1 32 501-600                       0                          22 601-700                      0  30 601-700                       0  <140 0.0% 0.0% 0.0% 0.4% 0.0% 0.0% 0.0% 0.3% 5.7% 4.2% 12.9% 16.8% 24.2% 30.2% 35.6% 40.8% 25.9% 21.0% 16.3% 6.5% 0.4% 2.4% 2.1% 1 codend mesh-size 40 mm 2 codend mesh-size 25 mm liner  6 Table 3.  Annual nominal catches (t) by country of northern shrimp (Pandalus borealis) caught in NAFO Div. 3M. Nation 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010*Canada 3724 1041 970 906 807 484 490 618 295 16 10Cuba 119 46 1037 1537 1462 969 964 1126 446 11EU/Estonia 1081 2092 1900 3240 5694 10835 13256 9851 14215 12851 13444 12009 8466 10607 10255 1884EU/Denmark 800 400 200 437 235 93 359EU/Latvia 300 350 1940 997 1191 3080 3105 2961 1892 3533 3059 2212 1330 1939 1285 1198EU/Lithuania 1225 675 2900 1785 3107 3370 3529 2701 3321 3744 4802 3652 1245 1992 410EU/Poland 824 148 894 1692 209 1158 458 224EU/Portugal 300 150 170 203 227 289 420 16 50 3EU/Spain 240 300 158 50 423 912 1020 1347 855 674 857 1049 725 997 768 406 640EU/United Kingdom 547Faroe Is. 7333 6791 5993 8688 7410 9368 9199 7719 10228 8516 12676 4952 2457 1102 2303 1201 1348 468France (SPM) 150 138 337 161 487 741 193Greenland 3788 2275 2400 1107 104 866 576 1734 644 1990 12 778Iceland 2243 2355 7623 20680 7197 6572 9277 8912 5265 5754 4715 3567 4014 2099Japan 114 130 100 117Norway 7183 8461 9533 5683 1831 1339 2975 2669 12972 11833 21238 11738 223 890 1872 321Russia 350 3327 4445 1090 1142 7070 5687 1176 3 654 266 46 73 20 20Ukraine 348 237 315 282USA 629Total 25611 24579 33471 48299 26028 30321 43439 52867 53389 50214 63970 45757 27479 18595 20741 12889 5286 10871 NAFO Statlant 21 A2 From the fisheries biologist of respective countries3 Assessed by Stacfis4 Reported to NAFO provisionally* Provisional reported to 10 September6192 2 211 1 1 1 1 1 12 1 2 1 1 2 2 211 1 1 1 1 1 1 1 1 1 1111111111111 1 1 1 1 1 11 1 1 1 1 1 11 1 1 1 1 1 1 2 212 1 1 1 12 2 21 1 11 1 1 1 1 1 1 1 2 1 21 1 1 2 2 1 1 1 1 11 1 1 11 1 1 2 1 1 1 1 11 11 1 1 1 1 12 11 1 1 1112111112 2 111111144     Table 4.- Exploitation Rate of Shrimp (Div. 3M) as Nominal Catches (tons) divided by UE Survey Index (tons).   Year Nominal Catches UE Survey Female Index Exploitation Rate 1993 25611 6923 3.7 1994 24579 2945 8.3 1995 33471 4857 6.9 1996 48299 5132 9.4 1997 26028 4885 5.3 1998 30321 11444 2.6 1999 43439 13669 3.2 2000 52867 10172 5.2 2001 53389 13336 4.0 2002 50214 17091 2.9 2003 63970 11589 5.5 2004 45757 12081 3.8 2005 27479 14381 1.9 2006 18595 11359 1.6 2007 20741 12843 1.6 2008 12889 8630 1.5 2009 5286 1764 3.0 2010* 1087 3818 0.3 * Preliminary data to 10 August 8                                                 Figure 1.The NAFO 3M stratification scheme used in EU research bottom trawl survey showing the sets carried out in 2010.  47.0º46.5º46.0º45.5º45.0º44.5º44.0º43.5º43.0º45.5º46.0º46.5º47.0º47.5º48.0º48.5º49.0º49.3ºFLEMISH CAP 201012635478910111512141316191817144181254365547730912109512771460202122232425 2627282930313234333738393637 9       Figure 2. EU survey cod biomass (gross solid line) and total shrimp biomass (dashed line) in the years 1988-2010 on Flemish Cap. 0204060801001201988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010YearCod Biomass  ('000 tons)024681012141618Shrimp Biomass ('000 tons)Cod Total shrimp 10                                              Figure 3.- Distribution of NAFO Div. 3M Northern shrimp (Pandalus borealis) catches kg/tow as obtained from EU research bottom trawl surveys conducted over the period 2005-2010.  -47 -46.5 -46 -45.5 -45 -44.5 -44 -43.5 -4345.54646.54747.54848.549 Northern shrimp 200547º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200647º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200747º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49ºNorthern shrimp 200847º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200947º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49ºNorthern shrimp 2010 11       .                                       Figure 4. Shrimp size distribution from Flemish Cap 2002-2010 surveys. Y-Axis=Frequency (106), X-Axis=Carapace Length (mm). 020040060080010001200 2002050100150200250300020040060080010001200 20030501001502002503000200400600800100012002004050100150200250300020040060080010001200 20050501001502002503000200400600800100012002007050100150200250300020040060080010001200200605010015020025030002004006008001000120005010015020025030020080200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620090200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 362010 12  Figure 5. Abundance indexes at age 2 obtained in EU Flemish Cap surveys from Lofoten gear (black line) and Juvenile bag (dotted line).     0.01.02.03.04.05.06.01999 2001 2003 2005 2007 2009YearRecruitment indicesEU age 2EU age 2  juvenile bag 13    Figure 6. Trends in NAFO Div. 3M northern shrimp (Pandalus borealis) catch (t) and TAC over the period 1993-2010.                             Figure 7.  Exploitation rates as nominal catch divided by the EU survey biomass index of the same year.  Dashed line shows the preliminary data in 2010 0102030405060701993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010YearCatch ('000 tons)TotalRecommended TACPreliminary0.01.02.03.04.05.06.07.08.09.010.01992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010YearExploitation rate   Exploitation rate preliminary

Division 3M Northern shrimp (Pandalus borealis) – Interim Monitoring Update

This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M. The assessment for this resource was completed, within Scientific Council during autumn 2011. Scientific Council recommended that the fishing mortality for 2013 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2012 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011 and 2012, due to the moratorium initiated in 2011. The biomass estimates (EU survey summer 1988-2012) are updated within this report. In the 2011 EU survey the 3M total and female biomass index were 1041t and 850 t respectively. These indexes were around 37% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a high level of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2011.S

Casas-Sánchez, José Miguel

Digital.CSIC

Division 3M Northern shrimp (Pandalus borealis) - Interim Monitoring Update

This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2010. Scientific Council recommended that the fishing mortality for 2011 and 2012 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2011 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011, due to the moratoria initiated in the present year. The catch table (1993-2010) and biomass estimates (EU survey summer 1988-2011) are updated within this report. Data indicate that 1766 t of shrimp was taken in 2010 when the effort was reduced by 50% well below comparing to 5374 t taken in 2009 without reduction on the effort. In the 2011 EU survey the 3M total and female biomass index were 1644 t and 1231 t respectively. These indexes were around 66% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a strong increase of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2010.S

NOT TO BE CITED WITHOUT PRIOR  REFERENCE TO THE AUTHOR(S)   Northwest Atlantic Fisheries Organization  Serial No. N6075 NAFO SCR Doc. 12/42  SCIENTIFIC COUNCIL MEETING – SEPTEMBER 2012  Division 3M Northern shrimp (Pandalus borealis) – Interim Monitoring Update By J.M. Casas Sánchez Abstract This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2011. Scientific Council recommended that the fishing mortality for 2013 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2012 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011 and 2012, due to the moratorium initiated in 2011. The biomass estimates (EU survey summer 1988-2012) are updated within this report. In the 2011 EU survey the 3M total and female biomass index were 1041t and 850 t respectively. These indexes were around 37% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a high level of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2011.  UE Bottom Trawl Research Survey Trends  Summer multi-species research surveys have been conducted onboard the Spanish vessels R/V Cornide de Saavedra since 1988 and R/V Vizconde de Eza since 2003. From 1988 to 2002 the indexes estimated by the R/V Cornide de Saavedra were calibrated and transformed to the R/V Vizconde de Eza following the Warren’s method. Fishing sets of 30 minute duration, with a tow speed of 3 knots, were randomly allocated to strata covering the Flemish Cap Bank to a depth of 1462 m since 2004, with the number of sets in a stratum proportional to its size (Figure 1).  Both vessels used the same gear (Lofoten) with a codend mesh size of 35 mm. In order to obtain information about the juvenile fraction of the stock, since 2001 a bag with 6 mm mesh size was attached to the cod-end of the Lofoten gear. SIMRAD ITI sensor was employed to monitor net geometry. Details of the survey design and fishing protocols are outlined in (Casas, 2008).   The increasing of biomass from 1988 to 1992, coincided with a period of time where there was not a directed fishery to shrimp and the cod stock began to decline. With the beginning of the shrimp fishery in 1993 the biomass declined up to 1997. After that from 1998 to 2008 the stock recovered reasonably well although with high annual variability (historical maximums in 2002 and 2005 were followed by years with lower biomass but at a relative high level). In 2009 the biomass decreased to values between the lowest of the historical series. In 2010 despite of the biomass increase about 77% compared to 2009 this was still among the lowest in the total of the historical series. The total biomass estimated in 2011 and 2012, around 1644 and 1041 t. were the lowest values in the historical series showing the worsening and depletion state of the shrimp stock (Table 1). This low values in the size of the shrimp stock are 2 likely associated to the increase of the cod stock experimented in the last years (Figure 2) and they remain well below Blim proxy (Figure 3). As in previous years the youngest specimens (age 1) didn’t appear in the catches and the abundance at age 2 were weakly presents suggesting the absence of any strong year classes since 2003. (Figure 4) Considering the abundance at age 2 as indicator of recruitment, the number of shrimp of two years old in the survey and from juvenile bag (Figure 5) were estimated and the index average-weighed. Since 2005, both indices showed low values indicating the sequence in recent years of weak year classes. In 2012 survey this decreasing trend continues and confirms the weakness of the last recruitments. Fishery and Management Catch trends  The fishery for northern shrimp at Flemish Cap began in the spring of 1993 and has since continued with estimated annual catches (as estimated by STACFIS, Table 3 and Figure 6) of approximately 26000 t to 48000 t in the years 1993 through 1996.  After 1996 the catches were lower and rising slowly from 26000 t in 1997 to 53000 t in 2000 and 2001.  There was 50000 t taken in 2002. The catch increased in 2003, reaching the highest value in the catches series (64000t), declining in the following years to about 1766 in 2010. In 2011 and 2012 following the NAFO SC recommendation no effort was directed to shrimp fishery in Flemish Cap and removals to September 2012 have not been recorded.  Exploitation rate Considering the Exploitation rate estimated as nominal catches divided by the EU survey biomass index of the same year (Figure 7 and Table 4), this was high in the years 1994-1997 when biomass was generally lower. In the years 1998-2004 the catch rate has been rather stable at a lower level. From 2005 to 2008 despite the exploitation rate remained stable at relative low values (between 1.9-1.5), the UE survey indexes estimated decreased year after year. This trend continued in the recent years despite the moratorium established on 3M shrimp stock in 2011.  In October 2011 Scientific Council notes that there are indications of factors other than fishery that may be involved in the current decline of the stock. Effort and TAC regulation During 2011 meeting, Scientific Council (NAFO 2011) noted the stock was at lowest level in the time series; bellow Blim and remaining in a state of impaired recruitment. Therefore, Scientific Council recommended that fishing mortality for 2013 be set as close to zero as possible. In the light of new information from EU Survey summer in 2012, the stock remains at lowest level in the time series and continues in the collapse zone. Also the recovery of the cod stock in recent years (with values of biomass in 2012 next to the historical maximums in the time series), coinciding with the decline of shrimp stock and the very low values of the exploitation level in 2011 and 2012, due to the moratorium, suggest that this drastic decline of the shrimp biomass is caused by the increasing of the natural mortality linked to predation by cod rather than fishing mortality.  Conclusions The low values of the Total and Female biomass indexes in 2009 continued in 2010 and well bellow the Blim proxy in 2011 and 2012, confirming the strong decrease of this stock caused by the weak recruitments in the last eight years and the increase of cod stock, one of their most important predators.  3 Based on the information available in October 2011 Scientific Council recommended that the fishing mortality for 2012 was set as close to zero as possible. The new and unfavourable information from EU Survey summer in 2012, confirms the recommendation carried out within Scientific Council during autumn 2011 according to which  the fishing mortality for 2012 and 2013 should be as close to zero as possible .  References Casas, J. M. 2008. Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2007. NAFO SCR Doc.08/ 68, Serial No.N5600 NAFO. 2011.  Scientific Council Meeting, 19-26 October, 2011.    4 Table 1. Total and Female Biomass (tons) of shrimp estimated by swept area method in the years 1988-2012 on EU Flemish  Cap surveys.  Year Total Biomass (tons) Female Biomass (tons) Valid Sets Number* 1988 5615 4525 115 1989 2252 1359 116 1990 3405 1363 113 1991 11352 6365 117 1992 24508 15472 117 1993 11673 6923 101 19941 3879 2945 116 1995 7276 4857 121 1996 10461 5132 117 1997 7449 4885 117 19982 39367 11444 119 1999 24692 13669 117 2000 19003 10172 120 2001 27204 13336 120 2002 36510 17091 120 2003 21087 11589 177 2004 20182 12081 177 2005 30675 14381 176 2006 16235 11477 179 2007 17046 12843 176 2008 11092 8630 166 2009 2797 1764 178 2010 4894 3819 153 2011 1643 1231 126 2012 1041 806 174  *Since 2003 the area surveyed and strata number increased up to depths from 740 to 1450 m. increasing proportionally the number of sets.  5 Table 2.  Total shrimp biomass estimated by strata (tons) in the years 1988-2012 from EU Flemish Cap surveys. Between 1988 and 2002 data were transformed by Warren’s method. (cells with 0 values corresponding to strata with biomass lower than 0.5 t; empty cells corresponding to strata with biomass = 0 t.) estratos brazas 1988 1989 1990 1991 1992  1993 19941 1995 1996 1997 19982  1999  2000  2001  2002  2003  2004  2005 2006 2007 2008 2009 2010 2011 2012 1 70-80                3 0   0    198 2 81-100           175   69 112 690 217 193 8 50 0 0 1 0 0 3 101-140    10     148 39 639 450 1486 2169 5527 1817 2107 1207 477 20 11 1 21 1 0 4 101-140           239 596 306 1099 1942 637 785 2739 1195 11 1 3 15 0 1 5 101-140     8    26 110 1107 1948 2135 2782 2445 3780 867 847 664 558 11 28 21 1 8 6 101-140    32 2 5  20 422 161 2915 1142 657 2112 2951 1667 1250 1080 299 462 23 1 43 0 3                            7 141-200  30 400 1265 3763 2704 117 506 1336 988 4056 3072 2213 3006 4632 1521 3108 3202 1370 1642 468 32 495 8 46 8 141-200   88 248 1662 826 4 248 676 393 2402 2507 1140 2900 4257 1110 2043 5747 3084 709 1938 308 326 6 31 9 141-200 133 69 35   135  613 459 412 3981 1139 1110 1483 1754 819 673 808 1435 1277 1159 48 235 31 21 10 141-200 275 75 321 2103 3235 1778 752 1315 1148 1099 7186 4052 2771 3760 3748 4685 2489 2935 614 3248 671 154 467 58 31 11 141-200 263  148 1144 4096 1335 447 650 1235 1018 6049 3017 3005 4091 3460 3003 2350 2728 1086 2878 368 174 712 16 64                            12 201-300 2170 505 512 2361 4654 2115 636 1201 1295 1195 2042 2127 1082 845 1468 378 1222 1980 1524 1965 1585 569 1060 242 208 13 201-300  66 64 89 38 136  28 687 554 1580 1465 43 620 217 23 230 903 691 373 1080 149 80 56 67 14 201-300 618 375 623 995 2543  679 792 1076 426 3034 1717 689 843 2014 303 726 2750 923 1481 1593 215 305 460 79 15 201-300 963 451 855 2004 3605 2292 1078 1370 1278 478 2575 1156 1753 837 1108 483 993 1374 1539 1597 1944 649 824 407 133                            16 301-400 777 253 355 179 420 139 49 57 237 168 515 172 464 375 506 92 696 1587 840 526 108 145 188 208 115 17 301-400      35         3   10 196 56 33 2  8 0 18 301-400      175   43 9   6  44  42 56 115 8 10 3 20 9 0 19 301-400 134 359  792 388  118 467 397 404 887 109 121 229 311 61 366 530 173 187 61 278 77 172 35                            20 401-500                 6 353 29 20 5 1 0 39 0 21 501-600                  2    0  24 401-500                        0  25 501-600                         0 28 401-500                 52 138 175 54 71 26  11 7 29 501-600                       1   30 601-700                       0   31 601-700                         0 32 501-600                       0   33 401-500                  6    7    34 501-600                  12   1 0  0 1 codend mesh-size 40 mm 2 codend mesh-size 25 mm liner  6 Table 3.  Annual nominal catches (t) by country of northern shrimp (Pandalus borealis) caught in NAFO Div. 3M. Nation 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011* 2012*Canada 3724 1041 970 906 807 484 49026182295116 101Cuba 119 4611037115371146219691964111261446111EU/Estonia 1081 2092 1900 3240 5694 1083511325629851114215212851113444112009184662106072102552215222662EU/Denmark 800 400 200 437 235 9313591EU/Latvia 300 350 1940 99711191130801310512961118921353313059122121133011939112851119416111EU/Lithuania 1225 675 2900 178513107133701352912701133211374414802136521124511992148511021EU/Poland 824 148189411692120911158145812241EU/Portugal 300 150 170120312271289142011615013EU/Spain 240 300 158 50 42319121102011347185516741857110492725299727681406253715072EU/United Kingdom 5471Faroe Is. 7333 6791 5993 8688 7410 9368 9199 7719210228285162126762495212457111021230311201 134914951France (SPM) 150 138133711611487 74111931Greenland 37881227512400111071104186615761173416441199021217782Iceland 2243 235517623 20680171971657219277289122526525754147151356714014120991Japan 1141130 10011171Norway 7183 8461 9533 5683 1831113391297512669212972111833121238111738122318902191413212Russia 350 3327 4445 1090 1142 707015687111761316541266146173121120171Ukraine 3481237131512821USA 6291Total 25611 24579 33471 48299 26028 30321 43439 52867 53389 50214 63970 45757 27479 18595 20741 13985 5448 1988 0 0  * Moratorium 1 NAFO Statland 21 A 2 From the fisheries biologist of respective countries 7 Table 4.- Exploitation Rate of Shrimp (Div. 3M) as Nominal Catches (tons) divided by UE Survey Index (tons).  Year Nominal Catches UE Survey Female Index Exploitation Rate 1993 25611 6923 3.7 1994 24579 2945 8.3 1995 33471 4857 6.9 1996 48299 5132 9.4 1997 26028 4885 5.3 1998 30321 11444 2.6 1999 43439 13669 3.2 2000 52867 10172 5.2 2001 53389 13336 4.0 2002 50214 17091 2.9 2003 63970 11589 5.5 2004 45757 12081 3.8 2005 27479 14381 1.9 2006 18595 11359 1.6 2007 20741 12843 1.6 2008 12889 8630 1.5 2009 5286 1764 3.0 2010 1766 3818 0.5 2011* 0 1231 0 2012* 0 806 0 *moratorium on fishing shrimp in 3M    8                        Figure 1. NAFO 3M stratification used in EU research bottom trawl survey showing the sets carried out in 2012.  47.0º46.5º46.0º45.5º45.0º44.5º44.0º43.5º43.0º45.5º46.0º46.5º47.0º47.5º48.0º48.5º49.0º49.3ºFLEMISH CAP 201212635 478910111512141316191817144181254365547730912109512771460202122232425 2627282930313234333738393635 9   Figure 2. EU survey cod biomass (gross solid line) and total shrimp biomass (dashed line) in the years 1988-2012 on Flemish Cap.  Figure 3. EU survey female shrimp biomass in the years 1988-2012 on Flemish Cap and Blim proxy of 3M shrimp stock.     0204060801001201988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012YearCod Biomass  ('000 tons)051015202530354045 Total shrimp Biomass ('000 tons)Cod Total shrimp025005000750010000125001500017500200001988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012YearEU Survey Female Index (t.)B lim 10                           Figure 4. Shrimp size distribution from Flemish Cap 2003-2012 surveys. Y-Axis=Frequency (106), X-Axis=Carapace Length (mm).0200400600800100012002004050100150200250300020040060080010001200 20050501001502002503000200400600800100012002007050100150200250300020040060080010001200200605010015020025030002004006008001000120005010015020025030020080200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620090200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620100200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620110200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 362012males females  11 0.01.02.03.04.05.06.07.02001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012YearRecruitment indicesEU age 2EU age 2 juvenile bag Figure 5. Abundance indexes at age 2 obtained in EU Flemish Cap surveys from Lofoten gear (black line) and Juvenile bag (dotted line).       Figure 6. Trends in NAFO Div. 3M northern shrimp (Pandalus borealis) catch (t) and TAC over the period 1993-2012.     0102030405060701993 1996 1999 2002 2005 2008 2011YearCatch ('000 tons)PreliminaryTotalRecommended TAC 12           Figure 7.  Exploitation rates as nominal catch divided by the EU survey biomass index of the same year.   0.01.02.03.04.05.06.07.08.09.010.01993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011YearExploitation rate   

This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2009. The indices of biomass in the July 2009 survey showed a sharp decline, confirming recent downward trends, even though the levels of exploitation have been low since 2005. The estimate of stock size was below Blim and it has entered the collapse zone defined by the NAFO PA framework, and recruitment prospects remained poor. Therefore, Scientific Council recommended  that the fishing mortality for 2010 and 2011 be set as close to zero as possible. The catch table (to September 2010) and biomass estimates (EU survey summer 1988-2010) are updated within this report. Preliminary data indicate that 5286 t of shrimp was taken in 2009 against an annual TAC of between 18000 and 27000 tons. In the 2010 EU survey the 3M total and female biomass index was 4894 and 3819 t respectively. These indexes were 75% higher than last year and although they were still low compared to historical average they are now above Blim. This new situation makes necessary the revision of the recommendation carried out within Scientific Council during autumn 2009.S

This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2010. Scientific Council recommended that the fishing mortality for 2011 and 2012 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2011 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011, due to the moratoria initiated in the present year. The catch table (1993-2010) and biomass estimates (EU survey summer 1988-2011) are updated within this report. Data indicate that 1766 t of shrimp was taken in 2010 when the effort was reduced by 50% well below comparing to 5374 t taken in 2009 without reduction on the effort. In the 2011 EU survey the 3M total and female biomass index were 1644 t and 1231 t respectively. These indexes were around 66% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a strong increase of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2010

NOT TO BE CITED WITHOUT PRIOR  REFERENCE TO THE AUTHOR(S)   Northwest Atlantic Fisheries Organization  Serial No. N5934 NAFO SCR Doc. 11/45  SCIENTIFIC COUNCIL MEETING – SEPTEMBER 2011  Division 3M Northern shrimp (Pandalus borealis) – Interim Monitoring Update By  J.M. Casas Sánchez  Abstract  This document updates some of the indices for northern shrimp (Pandalus borealis) harvested within NAFO Divisions 3M.  The assessment for this resource was completed, within Scientific Council during autumn 2010. Scientific Council recommended that the fishing mortality for 2011 and 2012 be set as close to zero as possible. Now, the low indices of biomass estimated in the 2011 EU summer survey, where the stock size was well below Blim proxy, confirm the depletion of the stock after several years of downward trend, even though the levels of exploitation have been low since 2005 and close to zero in 2011, due to the moratoria initiated in the present year. The catch table (1993-2010) and biomass estimates (EU survey summer 1988-2011) are updated within this report. Data indicate that 1766 t of shrimp was taken in 2010 when the effort was reduced by 50% well below comparing to 5374 t taken in 2009 without reduction on the effort. In the 2011 EU survey the 3M total and female biomass index were 1644 t and 1231 t respectively. These indexes were around 66% lower than last year and the lowest values in the EU survey series. As previous years, the sharp decline of shrimp biomass in Flemish Cap was associated with a strong increase of the cod stock. This unfavorable situation confirms the recommendation carried out within Scientific Council during autumn 2010.   UE Bottom Trawl Research Survey Trends   Summer multi-species research surveys have been conducted onboard the Spanish vessels R/V Cornide de Saavedra since 1988 and R/V Vizconde de Eza since 2003. From 1988 to 2002 the indexes estimated by the R/V Cornide de Saavedra were calibrated and transformed to the R/V Vizconde de Eza following the Warren’s method. Fishing sets of 30 minute duration, with a tow speed of 3 knots, were randomly allocated to strata covering the Flemish Cap Bank to a depth of 1462 m since 2004, with the number of sets in a stratum proportional to its size (Figure 1).  Both vessels used the same gear (Lofoten) with a codend mesh size of 35 mm. In order to obtain information about the juvenile fraction of the stock, since 2001 a bag with 6 mm mesh size was attached to the cod-end of the Lofoten gear. SIMRAD ITI and SCANMAR sensors were employed to monitor net geometry. Details of the survey design and fishing protocols are outlined in (Casas, 2008).  In 2011 the number of tows planned was lower than previous years due to technical problems. Anyway all strata were sampled properly and general trend of shrimp stock can be described.  The increasing of biomass from 1988 to 1992, coincided with a period of time where there was not a directed fishery to shrimp and the cod stock began to decline. With the beginning of the shrimp fishery in 1993 the biomass declined up to 1997. After that from 1998 to 2008 the stock recovered reasonably well although with high annual variability (historical maximums in 2002 and 2005 were followed by years with lower biomass but at a relative high level). In 2009 the biomass decreased to values between the lowest of the historical series. In 2010 despite of the biomass increase about 77% compared to 2009 this was still among the lowest in the total of the historical series. The total biomass estimated in 2011, around 1644 t. was the lowest value showing the depletion state of the shrimp stock (Table 1). This low values in the size of the shrimp stock are likely associated to the increase of the cod stock experimented in the last years (Figure 2) and they are now well below Blim proxy (Figure 3).  Biomass estimated by depth strata from 1988 to 2009 is shown in Table 2. The presence of shrimp in shallowest strata, with depths less than 140 fathoms (257 m), was scarce in the first years (1988-1995). However, since 1996, a noticeable amount of shrimp occurred in these strata and the estimated biomass increased up to 2002 and 2003 years where the 36 % and 40% respectively of the total biomass were estimated in depths lesser than 140 fathoms. After these years the biomass estimated in 2  these depths declined each year and practically disappears in 2011 (0.1% of total biomass). The figure 4 shows this evolution between the years 2006-2011.   As in previous years the youngest specimens (age 1) didn’t appear in the catches and  the abundance at age 2 were weakly presents  suggesting the absence of any strong year classes since 2003. (Figure 5)  Considering the abundance at age 2 as indicator of recruitment, the number of shrimp of two years old in the survey and from juvenile bag (Figure 6) were estimated and the index average-weighed. Since 2005, both indices showed low values indicating the sequence in recent years of weak year classes. Although in 2011 the index corresponding to juvenile bag increases slightly, a further drop in the value obtained from the main gear seems to indicate the weakness of the last recruitments.  Fishery and Management  Catch trends  The fishery for northern shrimp at Flemish Cap began in the spring of 1993 and has since continued with estimated annual catches (as estimated by STACFIS, Table 3 and Figure 7) of approximately 26000 t to 48000 t in the years 1993 through 1996.  After 1996 the catches were lower and rising slowly from 26000 t in 1997 to 53000 t in 2000 and 2001.  There was 50000 t taken in 2002. The catch increased in 2003, reaching the highest value in the catches series (64000t), declining in the following years to about 1766 in 2010. In 2011 following the NAFO SC recommendation no effort was directed to shrimp fishery in Flemish Cap and removals to September 2011 have not been recorded.   Exploitation rate Considering the Exploitation rate estimated as nominal catches divided by the EU survey biomass index of the same year (Figure 8 and Table 4), this was high in the years 1994-1997 when biomass was generally lower. In the years 1998-2004 the catch rate has been rather stable at a lower level. From 2005 to 2008 despite the exploitation rate remains stable at relative low values (between 1.9-1.5), the UE survey indexes estimated decreased year after year. This trend has continued in the recent years despite the low values of the exploitation rate in 2010 and the moratorium established on 3M shrimp stock in 2011.     Effort and TAC regulation During 2010 meeting, Scientific Council (NAFO 2010) noted the stock remained near the lowest recorded in the time series and near Blim , All year classes since 2002 had been weak and recruitment prospects remained poor. Therefore, Scientific Council reiterated its September 2010 recommendation for 2011 that the fishing mortality be set as close to zero as possible. Scientific Council recommended that fishing mortality in 2011 and 2012 be set as close to zero as possible.  In the light of new information from EU Survey summer in 2011, the stock is at lowest level in the time series and it is again in the collapse zone. Also the recovery of the cod stock in recent years (the second highest in the time series in 2011), coinciding with the decline of shrimp stock and the low values of the exploitation level in 2010 and 2011 suggest that this drastic decline of the shrimp biomass is caused by the increasing of the natural mortality linked to predation by cod rather than fishing mortality.     Conclusions   The low values of the Total and Female biomass indexes in 2009 continued in 2010 and well bellow the Blim proxy in 2011, confirming the strong decrease of this stock caused by the weak recruitments in the last seven years and the increase of cod stock, one of their most important predators.   Based on the information available in October 2010 Scientific Council reiterated its September 2010 recommendation for 2010 and 2011 that the fishing mortality was set as close to zero as possible. The new and unfavourable information from EU Survey summer in 2011, confirms the recommendation carried out within Scientific Council during autumn 2010 according to which  the fishing mortality for 2011 and 2012 should be as close to zero as possible .   3  References   Casas, J. M. 2008. Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2007. NAFO SCR Doc.08/ 68, Serial No.N5600  NAFO. 2010.  Scientific Council Meeting, 20-27 October, 2010.    4  Table 1. Total and Female Biomass (tons) of shrimp estimated by swept area method in the years 1988-2011 on EU Flemish  Cap surveys.    Year Total Biomass (tons) Female Biomass (tons) Valid Sets Number* 1988 5615 4525 115 1989 2252 1359 116 1990 3405 1363 113 1991 11352 6365 117 1992 24508 15472 117 1993 11673 6923 101 19941 3879 2945 116 1995 7276 4857 121 1996 10461 5132 117 1997 7449 4885 117 19982 39367 11444 119 1999 24692 13669 117 2000 19003 10172 120 2001 27204 13336 120 2002 36510 17091 120 2003 21087 11589 177 2004 20182 12081 177 2005 30675 14381 176 2006 16235 11477 179 2007 17046 12843 176 2008 11092 8630 166 2009 2797 1764 178 2010 4894 3819 153 2011 1643 1231 126  *Since 2003 the area surveyed and strata number increased up to depths from 740 to 1450 m. increasing proportionally the number of sets. Table 2.  Total shrimp biomass estimated by strata (tons) in the years 1988-2011 from EU Flemish Cap surveys. Between 1988 and 2002 data were transformed by Warren’s method. (cells with 0 values corresponding to strata with biomass lower than 0.5 t; empty cells corresponding to strata with biomass = 0 t.)  Stratum (Fathoms) 1988 1989 1990 1991 1992 1993 19941 1995 1996 1997 19982 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 1 70-80     3 0 0   2 81-100    175  69 112 690 217 164 8 50 0 0 1 0 3 101-140    10 148 39 639 450 1486 2169 5527 1817 2107 1023 477 20 11 36 21 1 4 101-140    239 596 306 1099 1942 637 785 2395 1195 11 1 3 15 0 5 101-140    8 26 110 1107 1948 2135 2782 2445 3780 867 695 664 558 11 28 21 1 6 101-140    32 2 5 20 422 161 2915 1142 657 2112 2951 1667 1250 883 299 462 23 1 43 0         7 141-200  30 400 1265 3763 2704 117 506 1336 988 4056 3072 2213 3006 4632 1521 3108 2607 1370 1642 468 32 495 8 8 141-200   88 248 1662 826 4 248 676 393 2402 2507 1140 2900 4257 1110 2043 4585 3084 709 1938 308 326 6 9 141-200 133 69 35 135 613 459 412 3981 1139 1110 1483 1754 819 673 583 1435 1277 1159 48 235 31 10 141-200 275 75 321 2103 3235 1778 752 1315 1148 1099 7186 4052 2771 3760 3748 4685 2489 2447 614 3248 671 154 467 58 11 141-200 263  148 1144 4096 1335 447 650 1235 1018 6049 3017 3005 4091 3460 3003 2350 2284 1086 2878 368 174 712 16         12 201-300 2170 505 512 2361 4654 2115 636 1201 1295 1195 2042 2127 1082 845 1468 378 1222 1510 1524 1965 1585 569 1060 169 13 201-300  66 64 89 38 136 28 687 554 1580 1465 43 620 217 23 230 689 691 373 1080 149 80 56 14 201-300 618 375 623 995 2543 679 792 1076 426 3034 1717 689 843 2014 303 726 2155 923 1481 1593 215 305 460 15 201-300 963 451 855 2004 3605 2292 1078 1370 1278 478 2575 1156 1753 837 1108 483 993 1039 1539 1597 1944 649 824 407         16 301-400 777 253 355 179 420 139 49 57 237 168 515 172 464 375 506 92 696 1099 840 526 136 145 188 208 17 301-400    35  3 5 196 56 33 2  18 301-400    175 43 9 6 44 42 42 115 8 10 3 20  19 301-400 134 359  792 388 118 467 397 404 887 109 121 229 311 61 366 402 173 187 61 278 77 172        20 401-500     6 250 29 20 7 1 0 39 28 401-500     52 130 175 54 71 26 6 11 33 401-500     5 0 0 7         21 501-600     0 0 0 0 34 501-600     13 0 1 0 0 29 501-600     1  32 501-600     0         22 601-700     0  30 601-700     0   <140 0.0% 0.0% 0.0% 0.4% 0.0% 0.0% 0.0% 0.3% 5.7% 4.2% 12.9% 16.8% 24.2% 30.2% 35.6% 40.8% 25.9% 21.0% 16.3% 6.5% 0.4% 2.4% 2.1% 0.1% 1 codend mesh-size 40 mm 2 codend mesh-size 25 mm liner  6Table 3.  Annual nominal catches (t) by country of northern shrimp (Pandalus borealis) caught in NAFO Div. 3M.    1 NAFO Statland 21 A 2 From the fisheries biologist of respective countriesNation 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010Canada 3724 1041 970 906 807 484 490 2 618 2 295 1 16 10 1Cuba 119 46 1 1037 1 1537 1 1462 1 969 1 964 1 1126 1 446 1 11EU/Estonia 1081 2092 1900 3240 5694 10835 1 13256 2 9851 1 14215 2 12851 1 13444 1 12009 1 8466 2 10607 2 10255 2 2078 1 254 1EU/Denmark 800 400 200 437 235 93 1 359 1EU/Latvia 300 350 1940 997 1 1191 1 3080 1 3105 1 2961 1 1892 1 3533 1 3059 1 2212 1 1330 1 1939 1 1285 1 1194 1 610 1EU/Lithuania 1225 675 2900 1785 1 3107 1 3370 1 3529 1 2701 1 3321 1 3744 1 4802 1 3652 1 1245 1 1992 1 485 1 102 1EU/Poland 824 148 1 894 1 1692 1 209 1 1158 1 458 1 224 1EU/Portugal 300 150 170 1 203 1 227 1 289 1 420 1 16 1 50 1 3EU/Spain 240 300 158 50 423 1 912 1 1020 1 1347 1 855 1 674 1 857 1 1049 2 725 2 997 2 768 1 406 2 537 1 298 2EU/United Kingdom 547 1Faroe Is. 7333 6791 5993 8688 7410 9368 9199 7719 2 10228 2 8516 2 12676 2 4952 1 2457 1 1102 1 2303 1 1201 1349 1 495 1France (SPM) 150 138 1 337 1 161 1 487 741 1 193 1Greenland 3788 1 2275 1 2400 1 1107 1 104 1 866 1 576 1 1734 1 644 1 1990 2 12 1 778 2Iceland 2243 2355 1 7623 20680 1 7197 1 6572 1 9277 2 8912 2 5265 2 5754 1 4715 1 3567 1 4014 1 2099 1Japan 114 1 130 100 1 117 1Norway 7183 8461 9533 5683 1831 1 1339 1 2975 1 2669 2 12972 1 11833 1 21238 1 11738 1 223 1 890 2 1914 1 321 2Russia 350 3327 4445 1090 1142 7070 1 5687 1 1176 1 3 1 654 1 266 1 46 1 73 1 21 1 20 1 7 1Ukraine 348 1 237 1 315 1 282 1USA 629 1Total 25611 24579 33471 48299 26028 30321 43439 52867 53389 50214 63970 45757 27479 18595 20741 13985 5374 1766 Table 4.- Exploitation Rate of Shrimp (Div. 3M) as Nominal Catches (tons) divided by UE Survey Index (tons).   Year Nominal Catches UE Survey Female IndexExploitation Rate 1993 25611 6923 3.7 1994 24579 2945 8.3 1995 33471 4857 6.9 1996 48299 5132 9.4 1997 26028 4885 5.3 1998 30321 11444 2.6 1999 43439 13669 3.2 2000 52867 10172 5.2 2001 53389 13336 4.0 2002 50214 17091 2.9 2003 63970 11589 5.5 2004 45757 12081 3.8 2005 27479 14381 1.9 2006 18595 11359 1.6 2007 20741 12843 1.6 2008 12889 8630 1.5 2009 5286 1764 3.0 2010 1766 3818 0.5 2011* 0 1231 0 *moratorium on fishing shrimp in 3M  8                                                Figure 1.The NAFO 3M stratification scheme used in EU research bottom trawl survey showing the sets carried out in 2011.  47.0º46.5º46.0º45.5º45.0º44.5º44.0º43.5º43.0º45.5º46.0º46.5º47.0º47.5º48.0º48.5º49.0º49.3ºFLEMISH CAP 2011 126354789101115121413161918171441812543655477309121095127714602021222324 25 2627282930313234333738393637 9      Figure 2. EU survey cod biomass (gross solid line) and total shrimp biomass (dashed line) in the years 1988-2011 on Flemish Cap.  Figure 3. EU survey female shrimp biomass in the years 1988-2011 on Flemish Cap and Blim proxy of 3M shrimp stock.   0204060801001201988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010YearCod Biomass  ('000 tons)051015202530354045Total Shrimp Biomass ('000 tons)Cod Total shrimp020004000600080001000012000140001600018000200001989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011YearEU Survey Female IndexB lim 10                                            Figure 4.- Distribution of NAFO Div. 3M Northern shrimp (Pandalus borealis) catches kg/tow as obtained from EU research bottom trawl surveys conducted over the period 2006-2011.  47º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200647º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200747º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200847º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º Northern shrimp 200947º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49ºNorthern shrimp 2010northern shrimp 201147º 46.5º 46º 45.5º 45º 44.5º 44º 43.5º 43º45.5º46º46.5º47º47.5º48º48.5º49º 11      .                                       Figure 5. Shrimp size distribution from Flemish Cap 2003-2011 surveys. Y-Axis=Frequency (106), X-Axis=Carapace Length (mm). Males020040060080010001200Females050100150200250300020040060080010001200 2004050100150200250300020040060080010001200 20050501001502002503000200400600800100012002007050100150200250300020040060080010001200200605010015020025030002004006008001000120005010015020025030020080200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620090200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620100200400600800100012006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 360501001502002503006 8 10 12 14 16 18 20 22 24 26 28 30 32 34 3620112003  12 Figure 6. Abundance indexes at age 2 obtained in EU Flemish Cap surveys from Lofoten gear (black line) and Juvenile bag (dotted line).     0.01.02.03.04.05.06.07.02001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011YearRecruitment indicesEU age 2EU age 2 juvenile bag 13   Figure 7. Trends in NAFO Div. 3M northern shrimp (Pandalus borealis) catch (t) and TAC over the period 1993-2011.                             Figure 8.  Exploitation rates as nominal catch divided by the EU survey biomass index of the same year.  0102030405060701993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011YearCatch ('000 tons)TotalRecommended TAC0.01.02.03.04.05.06.07.08.09.010.01992 1994 1996 1998 2000 2002 2004 2006 2008 2010YearExploitation rate 

Division 3M Northern shrimp (Pandalus borealis) - Interim Monitoring Update

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