This paper shows data about catch, effort, catch per unit effort (CPUE) and size distributions of shrimp (Pandalus borealis) for Spanish commercial fishery in NAFO Divisions 3M and 3L in 2004

Casas-Sánchez, J.M. (José Miguel)

Río-Iglesias, J.L. (José Luis) del

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Casas-Sánchez, José Miguel

Río-Iglesias, José Luis  del

Digital.CSIC

The Spanish Shrimp Fishery on Flemish Cap (Division 3M) and Division 3L in 2004

Repositorio Institucional Digital del IEO

NOT TO CITED WITHOUT PRIOR  REFERENCE TO THE AUTHOR(S)   Northwest Atlantic    Fisheries Organization  Serial No. N5184 NAFO SCR Doc. 05/79  SCIENTIFIC COUNCIL MEETING – OCTOBER/NOVEMBER 2005  The Spanish Shrimp Fishery on Flemish Cap (Division 3M) and Division 3L in 2004  by  J. M. Casas and J. L. del Río  Instituto Español de Oceanografía, P.O. Box 1552, Vigo, Spain e-mail: mikel.casas@vi.ieo.es   Abstract  This paper shows data about catch, effort, catch per unit effort (CPUE) and size distributions of shrimp (Pandalus borealis) for Spanish commercial fishery in NAFO Divisions 3M and 3L in 2004  Material and Methods  The information concerning to the Spanish shrimp fishery was taken from data collected by UE observers on board in the Spanish vessels. Also, two Spanish scientific observers for the Spanish Scientific Program were on board during the fishing period directed to shrimp in two of the vessels, providing information about fishing activity and carrying out biological sampling (length distributions).   Results  In all vessels the gear used was a simple trawl with bar spacing sorting grates. The hauls were mainly carried out in depths between 250 and 500 meters. The 90% of the effort (fishing hours) was carried out between 300 and 500 meters (Fig. 1).   The annual catch according to UE observers was 155 tons and 1 049 tons in NAFO Div. 3L and 3M respectively (Gonzalez et. al., 2005). The Table 1 shows the catches and yields of shrimp and discards of the main caught species by quarter, together with the distribution of effort (number of days and hours of activity estimated).   Although the shrimp catch in Div. 3L was much smaller, the yields (kg/h) obtained were much bigger (835 kg/h) than Div. 3M (around 400 kg/h). In Div. 3M the biggest yield occurred in the second quarter with yields of 467 kg/h.   The Table 2 show the length distribution of shrimp by sexes, Divisions and quarters as percentage in the catches sampled during the 2004 year. The length distributions in Div. 3L showed a bigger percentage of females (66%) with two clear modes at 21 and 23 mm. The mode around 23 mm. was also present in length distribution of Div. 3M, however in the mode of 21 mm. was not present, showing two modes at 15 and 19 mm.  According to the results presented last year (del Río et al., 2004), these modal lengths would corresponded roughly with the ages 2 and 3 for males (15 and 19 mm, respectively) and ages 4 and 5 for females (21 and 23 mm.).    2 References  Casas, J.M., J.L Del Río,. and D. González Troncoso. 2004. Northern Shrimp (Pandalus borealis) on Flemish Cap Surveys 2003 and 2004. NAFO SCR Doc. 05/77 16 pp.  González, F , J. L. Del Río  , A. Vázquez, H. Murua , E. Román, M. Casas, P. Duran  and G. Ramilo. 2005. Spanish Research Report for 2004. NAFO SCS Doc.05/8    Table 1.  Estimated catches (kg), effort and CPUE (kg/h) from UE and Spanish scientific observers by quarter of the Spanish trawl fleet directed to shrimp fishery in NAFO Div. 3L and 3M in 2004.  DIVISION 3L SPECIES 1st 2nd 3rd 4th Total Northern shrimp1 149344  5290  154634 Capelin 4831    4831 Redfish 54      54 American plaice 151      151 Other fishes 1008    1008       Fishing days 12  1  13 Fishing hours 180  5  185 CPUE Shrimp (kg/h) 831  984  835 DIVISION 3M SPECIES 1st 2nd 3rd 4th Total Northern shrimp 58625 381772 222050 386969 1049416 Redfish 727 4417 32 2164 7340 Greenland halibut    8 8 Red hake   21  21 Skates 80 195  3 278 Wolfish    93 93 Witch flounder    2 2 American plaice 681 1178  6 1865 Other fishes    90 90       Fishing days 10 56 35 64 165 Fishing hours 152 826 580 1083 2641 CPUE Shrimp (kg/h) 385 462 383 357 397  3 Table 2:  Length distribution of Shrimp as percentage from sampled Spanish catches by quarters in NAFO Div. 3M.  Divisions 3M Quarters 2nd 3rd 4th total Length (mm) males females males females males females males females 10 0.01      0.00  10.5         11         11.5         12         12.5 0.07    0.05  0.05  13 0.11  0.16  0.10  0.11  13.5 0.29  0.31  0.29  0.29  14 0.24  1.35  0.55  0.65  14.5 0.24  1.44  0.79  0.84  15 0.11  6.06  2.24  2.63  15.5 0.46  1.95  1.92  1.81  16 0.44  4.65  3.19  3.19  16.5 0.63  2.48  1.94  1.91  17 1.02 0.01 3.08  3.00  2.86 0.00 17.5 2.85 0.01 2.32  1.63  1.83 0.00 18 3.71 0.08 7.82  2.73  3.55 0.01 18.5 5.49 0.04 4.49  2.52  3.04 0.00 19 7.24 0.05 5.84 0.16 4.55 0.05 4.95 0.06 19.5 5.04 0.10 3.33 0.00 4.34  4.25 0.01 20 4.31 0.59 2.42 0.66 5.81 0.15 5.20 0.26 20.5 3.67 0.61 2.20 0.97 3.09 0.23 3.01 0.37 21 2.43 1.29 2.36 1.73 5.15 0.54 4.53 0.77 21.5 2.44 1.95 1.44 0.91 2.16 1.63 2.08 1.55 22 2.08 2.34 0.44 2.92 2.05 4.01 1.82 3.72 22.5 1.63 4.49 0.16 3.14 0.51 3.59 0.55 3.60 23 1.34 5.01  1.26 0.90 8.93 0.80 7.50 23.5 0.51 6.37  6.15 0.30 7.34 0.27 7.09 24 0.15 6.78  4.43 0.22 8.17 0.18 7.52 24.5 0.12 7.48  10.36 0.05 3.80 0.05 5.04 25 0.07 5.30  3.52  5.84 0.01 5.46 25.5  3.48  4.33  1.73  2.25 26  2.09  1.88  1.89  1.90 26.5  1.83  1.29  0.77  0.93 27  1.24  1.10  0.51  0.65 27.5  0.88  0.00  0.25  0.26 28  0.56  0.75  0.22  0.33 28.5  0.47  0.16  0.10  0.14 29  0.15    0.13  0.11 29.5  0.09      0.01 30  0.01       30.5      0.02  0.02 TOTAL 46.71 53.29 54.29 45.71 50.10 49.90 50.45 49.55 Sampled catch (kg) 5559 4040 31631 41230 No. Samples 10 2 9 21 No. Sampled 3600 527 2773 6900   4   49.0º48.5º48.0º47.5º47.0º46.5º46.0º45.5º45.0º44.5º44.0º43.5º43.0º46.0º46.5º47.0º47.5º48.0º48.5º49.0º49.3º80100140200300400500600700800800700600 30020015010050600200 mil las400600500DIVISION 3L DIVISION 3M160 5580 11000  Fig. 1.   Geographical location and distribution of Spanish catches (kg) in NAFO Div. 3M and 3L in 2004.   02468101214161810 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30lenght classes (mm)percentage (%) Fig. 2. Size distribution (carapace lengths) of shrimp as percentage from catches sampled in NAFO Div. 3M in 2004.  

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The Spanish Shrimp Fishery on Flemish Cap (Division 3M) and Division 3L in 2004

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