Cárdenas-González, E. (Enrique) de

Durán-Muñoz, P. (Pablo)

Paz, X. (Xabier)

English

Durán-Muñoz, Pablo

Paz, Xabier

Cárdenas-González, Enrique  de

Digital.CSIC

Results From the 98 Spanish Bottom Trawl Survey in the NAFO
Regulatory Area for Divisions 3NO

Repositorio Institucional Digital del IEO

NOT TO BE CITED WITHOUT PRIOR REFERENCE TO THE AUTHOR(S) Northwest Atlantic Fisheries Organization Serial No. N3039 	 NAFO SCR Doc. 98/48 SCIENTIFIC COUNCIL MEETING - JUNE 1998 Results From the 98 Spanish Bottom Trawl Survey in the NAFO Regulatory Area for Divisions 3NO by P. Duran' X. Paz 1 , and E. de Cardenas 2 1  Institute Espanol de Oceanografia. P.O Box 1552, Vigo, Spain 2  Instituto Espanol de Oceanografia. Madrid, Spain As the previous years a stratified-random bottom trawl survey was performed in NAFO Regulatory Area (Divisions 3NO) during 6 th to 28 th May. The survey, witch covered offshore areas on the Grand.Bank, was conducted following the same procedures and the same vessel and gear of the 1995-97 surveys (Paz, et al, 1995; 1996, 1997). The area and strata to be covered by the survey were based on the stratification charts and tables in Bishop (1994). In 1998, the area covered was extended until 800 fathoms including the new strata: 755, 759, 763, 767. A total of 124 successful fishing sets were completed, 101 in Div 3N and 23 in Div 30 (Figure 1). At touchdown of the net a standard 30 minutes tow started at a mean speed of 3 knows. Trawls with net damage were excluded from analysis. From each set, catch numbers and weights for main species along with length frequency from American plaice, Greenland halibut, witch flounder, yellowtail flounder and cod. Otoliths were collected from American plaice, Greenland halibut, cod and roughead grenadier. The catch weight by tow distribution for American plaice, yellowtail flounder, Greenland halibut, witch flounder and cod appears in the figures 2 to 6. The catches of the five species considered: American plaice, yellowtail flounder, Greenland halibut, witch flounder and cod are increasing this year and their value indices estimates resulted greater. In the figure 7 appears the comparison between abundance and biomass indices for the four years considering only the strata covered in 1995 and in the figure 8 we compare three years considering the area covered in 1996, depth of the strata until 110 m.. Here the indices are referred to an area greater than in the figure 7. The abundance and biomass indices by strata for these species are presented in the tables 1 to 5 respectively, and their length distribution by sexes in tables 6 to 10 respectively. Cod length distribution (table 10) is given for both sexes combined. REFERENCES 	 -2 Bishop, C.A..1994. Revisions and additions to stratification schemes used during research vessels surveys in NAFO Subareas 2 and 3. NAFO SCR Doc 94/43, Serial N 2413, 23p. Paz, J.; J. Martinez and E. De Cardenas, 1995. Preliminary Results from the 95 Spanish Bottom Trawl Survey in the NAFO Regulatory Area for Divisions 3NO. NAFO SC R Doc 95/55, Serial N 2568, 9p. Paz, J.;P. Duran and E. De Cardenas. 1996. Preliminary Results from the 96 Spanish Bottom Trawl Survey in the NAFO Regulatory Area for Divisions 3NO. NAFO SC R Doc 96/49, Serial N 2725, 12p. Paz, J.;P. Duran and E. De Cardenas. 1997. Preliminary Results from the 97 Spanish Bottom Trawl Survey in the NAFO Regulatory Area for Divisions 3NO. NAFO SC R Doc 97/25, Serial N 2856, 13p Table 1.- American plaice abundance and biomass indices by strata in the 1998 Spanish spring bottom trawl survey in Div. 3NO. Estrata Area Number of hauls Area trawled Catch (number) Catch (Kg) Abundance (,000) Biomass (t) 353 269 4 0.05 7817 3447.0 45219 19940.7 354 246 3 0.04 8820 3680.7 60908 25416.2 355 74 2 0.02 1871 866.2 6257 2897.1 356 47 2 0.02 215 91.5 457 194.4 357 164 2 0.02 33 15.0 226 102.5 358 225 3 0.02 150 64.9 1429 618.2 359 421 6 0.07 8963 3832.2 54100 23130.6 360 2783 25 0.26 19074 8645.4 207258 93939.1 374 214 3 0.04 90 38.6 547 234.3 375- 271 3 0.03 120 57.2 941 449.3 376 1334 10 0.09 4624 2666.9 66322 38254.2 377' 100 2 0.02 581 303.5 2541 1326.8 378 139 2 0.01 85 33.6 985 389.2 379 106 3 0.04 86 25.6 255 	. 76.2 380 96 2 0.01 41 10.9 350 93.0 381 144 2 0.02 258 54.1 1624 340.6 382 343 3 0.02 161 42.0 2414 629.8 721 65 2 0.02 102 49.4 328 158.6 722 84 2 0.01 32 12.8 267 106.2 723 155 2 0.02 133 64.6 884 430.7 724 124 2 0.02 155 69.7 932 419.0 725 105 1 0.01 4 2.0 47 24.3 726 72 2 0.01 49 19.0 377 145.9 727 96 2 0.02 174 58.0 718 239.5 728 78 2 0.02 383 100.2 1448 378.9 752 131 2 0.02 1024 321.3 5861 1840.0 753 138 2 0.02 2597 945.4 16478 5998.4 754' 180 2 0.02 41 17.2 351 147.4 755 385 2 0.02 8 2.5 148 46.7 756 101 2 0.02 2899 1284.9 13012 5767.8 757 102 2 0.02 1323 529.0 6544 2616.1 758 99 2 0.01 47 25.9 443 244.2 759 127 2 0.02 0 0.0 0 0.0 760 154 2 0.02 88 51.7 635 372.5 761 171 2 0.02 45 22.3 373 184.9 762 212 2 0.01 0 0.0 0 0.0 763 261 2 0.02 1 0.5 13 6.0 764 100 2 0.02 4 1.6 18 7.4 765 124 2 0.01 0 0.0 0 0.0 766 144 2 0.02 0 0.0 0 0.0 767 158 2 0.01 0 0.0 0 0.0 TOTAL 10342 124 1.22 62098 27453 500711 227166.6 Standard error: 	 3999 	4293 -4- Table 2.- Yellowtail flounder abundance and biomass indices by strata in the 1998 Spanish spring bottom trawl survey in Div. 3NO. Estrata Area Number of hauls Area trawled Catch (number) Catch (Kg) Abundance (,000) Biomass (t) 353 269 4 0.05 313 146.2 1813 845.9 354 246 3 0.04 29 10.9 201 75.3 355 74 2 0.02 1 0.8 3 2.5 356 47 2 0.02 0 0.0 0 0.0 357 164 2 0.02 0 0.0 0 0.0 358 225 3 0.02 0 0.0 0 0.0 359 421 6 0.07 9 3.1 54 18.7 360 2783 25 0.26 123789 27955.2 1345060 303755.3 374 214 3 0.04 3 0.4 16 2.4 375 271 3 0.03 306 111.0 2401 871.9 376 1334 10 0.09 41721 8352.1 598447 119803.2 377 100 2 0.02 0 0.0 0 0.0 378 139 2 0.01 0 0.0 0 0.0 379 106 3 0.04 0 0.0 0 0.0 380 96 2 0.01 0 0.0 0 0.0 381 144 2 0.02 0 0.0 0 0.0 382 343 3 0.02 0 0.0 0 0.0 721 65 2 0.02 0 0.0 0 0.0 722 84 2 0.01 0 0.0 0 0.0 723 155 2 0.02 0 0.0 0 0.0 724 124 2 0.02 0 0.0 0 0.0 725 105 1 0.01 0 0.0 0 0.0 726 72 2 0.01 0 0.0 0 0.0 727 96 2 0.02 0 0.0 0 0.0 728 78 2 0.02 0 0.0 0 0.0 752 131 2 0.02 0 0.0 0 0.0 753 138 2 0.02 0 0.0 0 0.0 754 180 2 0.02 0 0.0 0 0.0 755 385 2 0.02 0 0.0 0 0.0 756 101 2 0.02 0 0.0 0 0.0 757 102 2 0.02 0 0.0 0 0.0 758 99 2 0.01 0 0.0 0 0.0 759 127 2 0.02 0 0.0 0 0.0 760 154 2 0.02 0 0.0 0 0.0 761 171 2 0.02 0 0.0 0 0.0 762 212 2 0.01 0 0.0 0 0.0 763 261 2 0.02 0 0.0 0 0.0 764 100 2 0.02 0 0.0 0 0.0 765 124 2 0.01 0 0.0 0 0.0 766 144 2 0.02 0 0.0 0 0.0 767 158 2 0.01 0 0.0 0 0.0 TOTAL 10342 124 1.22 166170 36579.7 1947995 425375.3 Standard error: 	 29221 	15485 -5 Table 3.- Greenland halibut abundance and biomass indices by strata in the 1998 Spanish spring bottom trawl survey in Div. 3NO. Estrata Area Number of hauls Area trawled Catch (number) Catch (Kg) Abundance (,000) Biomass (t) 353 269 4 0.05 306 I 59 1771 341.3 354 246 3 0.04 367 76.4 2536 527.6 355 74 2 0.02 12 6.2 40 20.7 356 47 2 0.02 332 91.9 704 195.2 357 164 2 0.02 902 181 6163 1236.8 358 225 3 0.02 441 76 4198 723.8 359 421 6 0.07 83 14.5 501 87.5 360 2783 25 0.26 57 9.7 619 105.4 374 214 3 0.04 7 1.5 42 9.1 375 271 3 0.03 0 0 0 0.0 376 1334 10 0.09 0 0 0 0.0 377 100 2 0.02 3 0.6 13 2.6 378 139 2 0.01 74 14.3 858 165.6 379 106 3 0.04 393 60.8 1169 180.9 380 96 2 0.01 362 53.4 3091 455.7 381 144 2 0.02 67 15 422 94.4 382 343 3 0.02 6 1.2 90 18.0 721 65 2 0.02 1115 254.6 3580 817.2 722 84 2 0.01 1376 535.2 11420 4440.2 723 155 2 0.02 523 114.6 3490 764.0 724 124 2 0.02 567 180.9 3406 1087.6 725 105 1 0.01 122 22.3 1485 271.5 726 72 2 0.01 2334 602.4 17928 4626.4 727 96 2 0.02 874 168.1 3609 694.1 728 78 2 0.02 5402 1232.6 20428 4661.5 752 131 2 0.02 3523 1168.2 20173 6690.0 753 138 2 0.02 1081 717.8 6862 4554.3 754 180 2 0.02 341 	- 373.1 2920 3198.0 755 385 2 0.02 446 410.9 8320 7670.1 756 101 2 0.02 11695 4742.9 52499 21290.4 757 102 2 0.02 3093 2052.3 15298 10149.6 758 99 2 0.01 1286 1132.3 12129 10676.0 759 127 2 0.02 1330 1038.2 7902 6168.5 760 154 2 0.02 1391 708.7 10022 5106.0 761 171 2 0.02 2111 991.3 17500 8218.8 762 212 2 0.01 1036 823.5 23425 18622.1 763 261 2 0.02 761 754.5 9131 9054.0 764 100 2 0.02 727 459.2 3340 2111.3 765 124 2 0.01 927 491.7 11789 6253.4 766 144 2 0.02 398 448.6 2994 3377.7 767 158 2 0.01 138 220 2005 3196.3 TOTAL 10342 124 1.22 46009 20305.4 293873 147863.6 Standard error: 	 2443 	4064 -6- Table 4.- Witch flounder abundance and biomass indices by strata in the 1998 Spanish spring bottom trawl survey in Div. 3N0. Estrata Area Number of hauls Area trawled Catch (number) Catch (Kg) Abundance (,000) Biomass (t) 353 269 4 0.05 48 34.6 278 200.2 354 246 3 0.04 761 326.6 5252 2255.3 355 74 2 0.02 1295 484.7 4332 1621.1 356 47 2 0.02 415 156.7 881 332.9 357 164 2 0.02 12 4.8 80 32.8 358 225 3 0.02 13 7.9 124 75.2 359 421 6 0.07 130 84.6 785 510.6 360 2783 25 0.26 31 24.4 336 265.3 374 214 3 0.04 	, 0 0.0 0 0.0 375 271 3 0.03 0 0.0 0 0.0 376 1334 10 0.09 2 1.9 29 27.3 377 100 2 0.02 0 0.0 0 0.0 378 139 2 0.01 1 1.0 11 11.6 379 106 3 0.04 5.0 24 14.9 380 96 2 0.01 1 0.4 9 3.5 381 144 2 0.02 0 0.0 0 0.0 382 343 3 0.02 0 0.0 0 0.0 721 65 2 0.02 692 177.7 2222 570.4 722 84 2 0.01 682 137.3 5657 1139.1 723 155 2 0.02 68 30.0 453 200.0 724 124 2 0.02 123 40.7 739 244.7 725 105 1 0.01 11 2.2 132 26.8 726 72 2 0.01 110 24.8 846 190.5 727 96 2 0.02 5 2.3 20 9.5 728 78 2 0.02 72 12.8 271 48.4 752 131 2 0.02 54 18.5 309 105.9 753 138 2 0.02 106 49.0 675 310.9 754 180 2 0.02 3 2.2 26 18.9 755 385 2 0.02 0 0.0 0 0.0 756 101 2 0.02 214 70.5 960 316.5 757 102 2 0.02 601 199.5 2970 986.6 758 99 2 0.01 64 11.8 599 . 111.3 759 127 2 0.02 1 1.2 6 7.3 760 154 2 0.02 525 175.2 3785 1262.3 761 171 2 0.02 648 220.3 5374 1826.5 762 212 2 0.01 0 0.0 0 0.0 763 261 2 0.02 2 0.7 24 8.3 764 100 2 0.02 504 139.9 2319 643.2 765 124 2 0.01 282 67.1 3589 853.4 766 144 2 0.02 51 14.8 384 111.4 767 158 2 0.01 21 6.3 305 91.5 TOTAL 10342 124 1.22 7555 2537.46 43807 14434.1 Standard error 	 588 	675 -7- Table 5.- Cod abundance and biomass indices by strata in the 1998 Spanish spring bottom trawl survey in Div. 3NO. Estrata Area Number of hauls Area trawled Catch (number) Catch (Kg) Abundance (,000) Biomass (t) 353 269 4 0.05 1 0.0 6 0.1 354 246 3 0.04 108 151.5 . 	746 1046.1 355 74 2 0.02 125 154.6 418 517.1 356 47 2 0.02 23 35.6 49 75.6 357 164 2 0.02 36 42.6 246 291.1 358 225 3 0.02 30 38.2 285 363.8 359 421 6 0.07 3 6.7 18 40.4 360 2783 25 0.26 11 15.8 117 171.9 374 214 3 0.04 0 0.0 0 0.0 375 271 3 0.03 6 6.7 47 52.6 376 1334 10 0.09 8 5.6 112 80.9 377 100 2 0.02 10 10.8 44 47.2 378 139 2 0.01 23 19.8 265 229.4 379 106 3 0.04 67 71.2 199 211.9 380 96 2 0.01 40 13.3 341 113.5 381 144 2 0.02 3 1.2 19 7.6 382 343 3 0.02 2 2.7 29 40.6 721 65 2 0.02 3 3.5 10 11.2 722 84 2 0.01 0 0.0 0 0.0 723 155 2 0.02 24 25.1 160 167.3 724 124 2 0.02 5331 8509.5 32052 51160.1 725 105 1 0.01 92 88.2 1120 1073.7 726 72 2 0.01 30 27.1 230 208.1 727 96 2 0.02 43 15.2 178 62.8 728 78 2 0.02 9 8.8 34 33.3 752 131 2 0.02 0 0.0 0 0.0 753 138 2 0.02 0 0.0 0 0.0 754 180 2 0.02 0 0.0 0 0.0 755 385 2 0.02 0 0.0 0 0.0 756 101 2 0.02 2 1.8 9 8.1 757 102 2 0.02 0 0.0 0 0.0 758 99 2 0.01 0 0.0 0 0.0 759 127 2 0.02 0 0.0 0 0.0 760 154 2 0.02 0 0.0 0 0.0 761 171 2 0.02 0 0.0 0 0.0 762 212 2 0.01 0 0.0 0 0.0 763 261 2 0.02 0 0.0 0 0.0 764 100 2 0.02 0 0.0 0 0.0 765 124 2 0.01 0 0.0 0 0.0 766 144 2 0.02 0 0.0 0 0.0 767 158 2 0.01 0 0.0 0 0.0 TOTAL 10342 124 1.22 6030 9255.6 36735 56014.7 Standard error: 3150 5371    - 8 - Table 6.- Length distribution of American plaice Frecuency % o Length groups (cm) Males Females Combined 12 0.02 0.02 0.03 14 0.02 0.0 0.02 16 1.1 0.7 1.8 18 0.2 0.5 0.7 20 1.3 0.9 2.1 22 4.4 3.6 7.9 24 15.3 12.7 27.9 26 24.6 21.9 46.4 28 45.4 31.3 76.7 30 60.4 40.9 101.3 32 55.6 60.3 115.9 34 42.1 96.8 138.9 36 24.0 113.1 137.1 38 12.4 105.7 118.1 40 4.0 78.8 82.8 42 2.3 53.7 55.9 44 0.6 36.5 37.1 46 0.6 20.2 20.8 48 0.1 13.4 13.5 50 0.0 5.9 5.9 52 0.0 2.5 2.5 54 0.3 1.7 1.9 56 0.0 1.3 1.3 58 0.0 1.2 1.2 60 0.0 1.2 1.2 62 0.0 0.3 0.3 64 0.0 0.3 0.3 66 0.0 0.1 0.1 68 0.0 0.2 0.2 TOTAL 294.6 705.4 1000.0 N° Ind. Sampled N° Samples Total catch Sampled catch Total hauls 4640 108 27453 27383 124 7390 12030 -9- Table 7.- Length distribution of yellowtail flounder Frecuency Vo o Length groups (cm) 	Males 	Females 	lndeterm. 	Combined 10 0.0 0.0 0.01 0.01 12 0.0 0.0 0.3 0.3 14 0.1 0.1 0.0 0.2 16 1.1 1.2 0.0 2.3 18 8.2 5.2 0.0 13.4 20 9.8 11.1 0.0 20.9 22 32.3 26.0 0.0 58.3 24 64.6 53.7 0.0 118.4 26 . 114.7 95.6 0.0 210.3 28 96.9 104.5 0.0 201.4 30 57.7 99.3 0.0 157.0 32 28.7 58.9 0.0 87.6 34 11.0 42.2 0.0 53.2 36 5.1 23.5 0.0 28.5 38 4.8 16.0 0.0 20.8 40 2.0 14.5 0.0 16.6 42 0.1 6.0 0.0 6.1 44 0.02 3.2 0.0 3.2 46 0.0 1.1 0.0 1.1 48 0.01 0.4 0.0 0.5 TOTAL 437.1 562.5 0.3 1000.0 N° Ind. Sampled 2848 3693 3 6544 N° Samples 48 Total catch 36580 Sampled catch 36578 Total hauls 124 - 10 - Table 8.- Length distribution of Greenland halibut Frecuency % o Length groups (cm) 	Males 	Females 	Indeterm. 	Combined 10 0.0 0.0 0.02 0.02 12 0.0 0.05 0.1 0.1 14 0.05 0.6 0.2 0.8 16 0.1 0.1 0.0 0.2 18 0.6 0.5 0.0 1.1 20 3.9 3.9 0.1 7.9 22 6.8 11.1 0.0 17.9 24 9.9 11.9 0.0 21.8 26 21.7 25.4 0.0 47.0 28 40.3 56.3 0.0 96.5 30 52.9 63.9 0.0 116.8 32 42.5 57.0 0.0 99.5 34 51.8 56.0 0.0 107.8 36 48.4 69.0 0.0 117.4 38 41.4 61.7 0.0 103.1 40 22.2 41.3 0.0 63.5 42 17.7 29.4 0.0 47.1 44 11.7 26.6 0.0 38.3 46 9.3 19.5 0.0 28.8 48 8.0 15.5 0.0 23.5 50 5.1 13.3 0.0 18.4 52 4.3 6.5 0.0 107 54 1.7 5.1 0.0 6.8 56 2.2 5.5 0.0 7.7 58 0.8 3.9 0.0 4.7 60 1.0 2.1 0.0 3.1 62 0.3 1.3 0.0 1.6 64 0.5 1.4 0.0 1.9 66 0.2 1.0 0.0 1.2 68 0.03 0.7 0.0 0.7 70 0.0 0.8 0.0 0.8 72 0.0 0.6 0.0 0.6 74 0.0 0.5 0.0 0.5 76 0.0 0.6 0.0 0.6 78 0.0 0.7 0.0 0.7 80 0.0 0.3 0.0 0.3 82 0.0 0.3 0.0 0.3 84 0.0 0.0 0.0 0.0 86 0.0 0.2 0.0 0.2 88 0.0 0.1 0.0 0.1 90 0.0 0.1 0.0 0.1 92 0.0 0.0 0.0 0.0 94 0.0 0.1 0.0 0.1 TOTAL 405.2 594.4 0.4 1000.0 N° Ind. Sampled 4470 7080 14 11564 N° Samples 84 Total catch 20305 Sampled catch 20305 Total hauls 124 -J1- Table 9.- Length distribution of witch flounder Frecuency Too Length groups (cm) 	Males 	Females 	Indeterm. 	Combined 16 0.0 0.0 0.4 0.4 18 0.0 0.0 0.1 0.1 20 0.0 1.2 0.1 1.3 22 1.5 2.8 0.3 4.6 24 7.3 9.0 0.3 16.7 26 11.7 19.5 0.1 31.4 28 27.0 33.1 0.0 60.1 30 41.4 41.9 0.0 83.2 32 50.6 50.9 0.0 101.5 34 61.7 60.5 0.0 122.3 36 78.5 68.9 0.0 147.4 38 65.3 76.1 0.0 141.4 40 40.3 68.5 0.0 108.8 42 21.1 47.1 0.0 68.2 44 12.4 27.0 0.0 39.4 46 7.4 23.8 0.0 31.2 48 4.6 16.4 0.0 21.0 50 0.6 8.1 0.0 8.7 52 0.4 6.8 0.0 7.2 54 0.3 2.2 0.0 2.5 56 0.1 2.0 0.0 2.1 58 0.0 0.6 0.0 0.6 60 0.0 0.1 0.0 0.1 TOTAL 432.1 566.5 1.4 1000.0 N° Ind. Sampled 1451 1914 8 3373 N° Samples 74 Total catch 2537 Sampled catch 2536 Total hauls 124 - 12 - Table 10.- Cod length distribution in the 1998 Spanish spring bottom trawl survey in Div. 3NO. Length (cm) Frecuency %, 12 - 14 1.3 15 - 17 1.6 18 - 20 0.8 21 - 23 0.5 24 - 26 1.3 27 - 29 4.8 30 - 32 7.3 33 - 35 5.3 36 - 38 5.0 39 - 41 13.5 42 - 44 24.5 45 - 47 80.6 48 - 50 119.9 51 - 53 122.7 54 - 56 179.1 57 - 59 150.9 60 - 62 95.2 63 - 65 69.4 66 - 68 32.2 .69 - 71 21.1 72 - 74 28.3 75 - 77 8.7 78 - 80 10.6 81 - 83 7.1 84 - 86 0.7 87 - 89 7.2 90 - 92 0.0 93 - 95 0.2 96 - 98 0.0 99 -101 0.0 102 - 104 0.2 TOTAL 1000.0 N° Ind. Sampled 967 N° Samples 55 Total catch 9256 Sampled catch 9256 Total hauls 124 200 mile limit 1998 - 13 - 3L 200 m 500 m 46° r 30 	 3N + + 1000 m + + - 45° 44° - 43° 53° 	52° 51° 	 50° ' 	49° 	 48° 	47° Fig 1.- Distribution of fishing stations during 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. 100 m 200 m 3L • 10 • \ • — 500 m 1000 m • 46° - 45° 44° -•‘ c_111-0 • • 200 mile limit 1998 - 43° 53° 	 52° 51° 	 50° 	 49° 48° 	 47° 30 • • 914 	1828 - 14 - Fig. 2.- Distribution of American plaice catches from the 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. Symbols represent Catch in weight (Kg) per haul (square root scale). 100 m 200 m 3L 500 m 1000 m 3N 30 46° -- 45° 50 m -- 44° 200 mile limit 4057.6 8115.2 - 15 - 53° 	52° 	 51 ° 	50° 	49° 	48° 	47° Fig. 3.- Distribution of yelowtail flounder catches from the 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. Symbols represent Catch in weight (Kg) per haul (square root scale). 100 m 200 m 3L 3N 30 4— 3° ;-4110 53° 	 52° 48° 	 47° 51° 	 50° 	 49° 500 m woo m 46° L 45° 44° • • — •  • • 1. • • 200 mile limit 	 N 	• •o • 'l sae • 1998 • 0 1317.3 2634.7 - 16 - Fig. 4.- Distribution of Greenland halibut catches from the 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. Symbols represent Catch in weight (Kg) per haul (square root scale). 3L 100 m 200 m 46° 500 m 1000 M 30 	 3N H 45° 50m i 	 1 ---- + r 44° 1 !-• •• • • N •7 • -14•-• • 0 siT 197.7 395.5 • -- 43° 200 mile limit 1998 1 - 17 - 53° 	52° 	51 ° 	50° 	49° 	48° 	47° Fig. 5.- Distribution of witch flounder catches from the 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. Symbols represent Catch in weight (Kg) per haul (square root scale). 7' •  • •. •-- -) 	0). ) L.' • ) _ • of - Is - 3L 100 m 200 m 500 m 1000 n1 , 46° 30 3N H 45° 200 mile limit 1998 • 1 	\ ' ‘ 	. •- 	4 50 m  1 - , )--) --, 	\ • \ se y , 	• 1_r• ) •\ , • -+. - L. -•)') \I lk  44° 0 41 - - 43° 0 	4251 8502 1 53° 	52° 51 ° 	50° 	49° 48° 	47° Fig. 6.- Distribution of cod catches from the 1998 Spanish Bottom Trawl Survey in NAFO Divs. 3NO. Symbols represent Catch in weight (Kg) per haul (square root scale). - 19 - American plaice. Abundance and Biomass estimated. NAFO Divisions 3N0, 1995-98 250000 -(- - - 500000 400000 .,4 -, 300000 2 (r)  200000 2 0- 100000 a -a 0 T 	200000 -4 ''' "R 1 &moo -L. § I t.. 100000 - - a 	50000 	(--1 	0 	' 	' I 	I 	I 1995 	1996 (as 95) 1997 (as 95) 1998 (as 95) Year of the Survey 0 B (Tm) —21— Num. (103) Yelowtail flounder. Abundance and Biomass estimated. Divisions 3N0, 1995-98 500000 NAFO 2500000 2000000 8 --,-; -t, 1500000 Ws .1  0 1000000 r g .o = 500000 	< 4r, 0 400000 0300000 0 m 200000 E 2 100000 .moo- I 1995 	1996 (as 95) 	1997 (as 95) 	1998 (as 95) Year of the Survey 0 B (Tm) —SI— Num. (103) 20000 2 t. 15000 c,"1 	loom E 2 	5000 m o - - Greenland halibut. Abundance and Biomass estimated. Divisions 3NO, 1995-98 NAFO 60000 50000 40000 2  a 30000 Ir2 (4' 20000 2 0 10000 < . -5 o i 	 I 1995 	1996 (as 95) 	1997 (as 95) 	1998 (as 95) Year of the Survey OB (Tm) -49—Num. (103) Witch flounder. Abundance and Biomass estimated. NAFO Divisions 3NO, 1995-98 6000 2 15000 p; 6- 10000 g -g 2 5000 	= 3 -¢ 9- 0 b 4500 61 3000 E o 	1500 m- 0 I 1995 	1996 (as 95) 	1997 (as 95) 	1998 (as 95) Year of the Survey 0 Ei (Tm) —II— Num. (103) Fig 7.- Abundance and biomass indices from Spanish survey for the main commercial species, considering only the strata covered in 1995. NAFO Divisions 3N0,1995-1998. -20- American plaice 250000 	 T 600000 ^, 	200000 b . 0 	150000 1  I50000 0 1 400000 2 a + 300000 4:j 8 2 	100000 83 	50000 200000 3 `" 0 a f 100000 0 1996 	1997 (as 96) 1998 (as 96) = B (Tm) —O—Abun.(10 3) 450000 T 400000 ,.._, 350000 rel. 300000 in 250000gi 0 200000 E 2 150000 in 100000 50000 0 Yellowtail flounder - 2500000 - 2000000 a)- 1500000 2 6' is 0 17 0 c r 1000000 - 	— a 500000 0 loon 	4 007 Me OA \ 	1 0017 tee. 96) =B (Tm) —11—Abun.(10 3) Greenland halibut 105000 	 T 250000 90000 C 75000 (a 	60000 in + 200000 0000 6' -8- 1 15 00 :)  Iv 100000 E Z. - 50000 a 1 	0 'I 45000 E 'CD 	30000 15000 0 1996 	1997 (as 96) 	1998 (as 96) 013 (Tm) -41—Abun.(10 3) 16000 14000 "S 12000 i- 10000a8000 5,)  g 	6000 in 	4000 2000 0 Witch flounder 45000 40000 35000 30000 c 25000 .6i g- 20000 S ,C2 15000 4 10000 5000 0 - 1996 	1997 (as 96) 	1998 (as 96) = B (Tm) —111--Abun.(10 3) Fig 8.- Abundance and biomass indices from Spanish survey for the main species, considering only the strata covered in 1996. NAFO div. 3NO, 1996-98 (1 Depth until 1100 m. 

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Results From the 98 Spanish Bottom Trawl Survey in the NAFO Regulatory Area for Divisions 3NO

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