Preliminary catches of smoothhound sharks E. Cortés and H. Balchowsky SEDAR39-DW-3 9 May 214 This information is distributed solely for the purpose of pre-dissemination peer review. It does not represent and should not be construed to represent any agency determination or policy.
Please cite this document as: Cortés, E. and H. Balchowsky. 214.Prelinimary catches of smoothhound sharks. SEDAR39- DW-3. SEDAR, North Charleston, SC. 29 pp.
Submitted May 9, 214 SEDAR 39-DW-3 Preliminary catches of smoothhound sharks Enric Cortés 1 and Heather Balchowsky 2 1 NOAA Fisheries Southeast Fisheries Science Center Panama City Laboratory 35 Delwood Beach Drive, Panama City, FL 3248, USA 2 NOAA Fisheries Southeast Fisheries Science Center Sustainable Fisheries Division 75 Virginia Beach Drive, Miami, FL 33149, USA ABSTRACT This document presents commercial landings, recreational catches, and discard estimates of smoothhound sharks (genus Mustelus) for -212. Information on the geographical distribution of both commercial landings and recreational catches and live discards is presented along with gear-specific information of commercial landings. Data on the disposition of smoothhound sharks in two commercial observer programs and length composition information and trends in average size of the catches from several commercial and recreational sources are also presented. KEYWORDS Catch, Landings, Discards, Commercial fishing, Long lining, Shark fisheries, Bycatch, Observer programs, Smoothhound sharks, Mustelus canis 1 National Oceanographic and Atmospheric Administration, National Marine Fisheries Service, Southeast Fisheries Science Center, Panama City Laboratory, 35 Delwood Beach Road, Panama City, Florida 3248, U.S.A. E-mail: Enric.Cortes@noaa.gov; Heather.Balchowsky @noaa.gov 1
1. Background The status of smoothhound sharks (genus Mustelus) has never been assessed. In preparation for the SEDAR 39 Data Workshop, the purpose of the present document is to develop preliminary catch tables to facilitate input into stock assessments. Information on geographical distribution of commercial landings and recreational catches as well as gearspecific information of commercial landings from several sources is presented. Size (length compositions and trends in average length and weight) information from several commercial and recreational sources is also compiled and analyzed. 2. Catch streams 2.1. Commercial landings U.S. commercial landings in weight were compiled from two sources: Northeast regional general canvass landings data (gcd) and Atlantic Coastal Cooperative Statistics Program (ACCSP) data for the Atlantic region and GulfFIN (Gulf Fisheries Information Network) data for the Gulf of Mexico region. ACCSP data cover all Atlantic states and were available for smooth dogfish (Mustelus canis) starting in. The Northeast gcd ranged from the northern states south to Virginia and were available for smooth dogfish as well starting in 1982. Total Atlantic shark landings of smooth dogfish were thus taken from the Northeast gcd for 1982-199 and from ACCSP for -212 (Table 1; Figure 1). The initial extraction of data from the ACCSP database revealed a very large peak in 1994 corresponding to gillnet catches in North Carolina. After consultation, it was clarified that the state of NC did not differentiate between smooth dogfish and spiny dogfish (Squalus acanthias) until. The state of NC lumped all landings into an unclassified dogfish category in - and in 1994, although they appeared identified as 8,642,748 lb whole weight (ww) of smooth dogfish and 1,234,931 lb ww of spiny dogfish (total 9,877,658 ww) in the ACCSP database, they were still unclassified dogfish (Alan Bianchi, NC Division of Marine Fisheries, pers. comm. to H. Balchowsky). To account for NC unclassified dogfish (smooth and spiny dogfish) that could have been smooth dogfish in -, we calculated the ratio of smooth to spiny dogfish for the first four years (-1998) with data reported by species. The ratio (.11) was then multiplied by the reported NC unclassified dogfish to yield estimates of smooth dogfish landings for, 1992, and. For 1994, the ratio of.11 was multiplied by the sum of reported smooth dogfish and spiny dogfish to yield an estimate of smooth dogfish. Landings showed an increasing trend from 1982 to 212, punctuated by two peaks, the largest one in 21 and a secondary peak in (Table 1; Figure 1). No landings of other Mustelus species were found in these two databases. For the Gulf of Mexico region, the GulfFIN database essentially contained no landings of Mustelus. Commercial landings were dominated by gillnets, followed by trawls and a not coded gear category, both of which were an order of magnitude lower than gillnets (Table 2; Figure 2). 2
Averaged over 1982-212, 83% of smooth dogfish were caught in gillnets, 8% in trawls, 7% in the not coded gear category, and 1% in longlines. Geographically, most landings occurred in NC (45%), followed by VA (23%), NJ (18%), MD (6%), and NY (5%), with the contribution from the rest of the Atlantic states being almost negligible (ca. 3%) (Table 3; Figure 3). Commercial landings in numbers can be calculated by dividing annual landings in weight by average weights from the Gillnet Observer Program (GNOP) and Reef Fish and Shark Bottom Longline Observer Programs (collectively referred to as BLLOP hereforth) as appropriate. All weights from the GNOP and BLLOP were predicted from fork length measurements taken by observers in gillnet and longline fisheries, respectively, using a length-weight regression. Average weights were available for 22-212 from the GNOP and for 1994-212 from the BLLOP. 2.2 Recreational catches Recreational catches of smoothhound sharks correspond to estimates from three data collection programs: the Marine Recreational Information Program (MRIP), the NMFS Headboat Survey (HBOAT) operated by the SEFSC Beaufort Laboratory, and the Texas Parks and Wildlife Department Recreational Fishing Survey (TXPWD). The MRIP has effectively replaced MRFSS (Marine Recreational Fishery Statistics Survey), but new estimates for a suite of fish species, including sharks, are only available for the period 24-212. For -23, MRFSS estimates were adjusted to MRIP using ratio estimators (see SEDAR32-WP-2). Annual recreational catch estimates of smoothhound sharks were computed as the sum of the MRIP (A+B1=fished landed or killed), HBOAT (fish landed), and TXPWD (fish landed) survey estimates as appropriate. In the Atlantic region, virtually all catches were of smooth dogfish and, overwhelmingly, from the MRIP. Catches in numbers showed a decreasing trend from 1982 to 212, punctuated by a peak in 1984 (Table 4; Figure 4, top panel). Most of the catches corresponded to NJ, DE, NY, NC, VA, MA, and MD, respectively, with those states accounting for about 88% of the total catches in both the Atlantic and Gulf of Mexico (Table 5; Figure 5, top panel). Catches in weight followed a similar trend to those in numbers (Table 4; Figure 4, middle panel). Catches in weight corresponded to NJ, DE, NC, MA, NY, VA, MD, and SC, respectively, with those states accounting for about 88% of the total catches in both the Atlantic and Gulf of Mexico (Table 6; Figure 5, bottom panel). We computed B2s (sharks released alive) in MRIP to calculate live post-release mortality once the hook-and-line post-release mortality rate for smooth dogfish is estimated (Courtney 214). B2 catches (available only in numbers) in the Atlantic followed an almost opposite trend to A+B1 catches (Tables 4, 7; Figure 4 bottom panel, Figure 5 bottom panel). The states of NJ (54%) and DE (21%) accounted for three quarters of all live releases. In the Gulf of Mexico region, the vast majority of catches were also of smooth dogfish and also came predominantly from the MRIP. There were some isolated catches of Florida 3
smoothhound (Mustelus norrisi) reported in the MRIP totaling ca. 1, animals over,,, 21, 22, 24, and 25. With the exception of a peak of almost 24, animals (12, lb ww) in 1984, annual catches never exceeded 8, animals (55, lb ww) (Table 8, Figure 6 top and middle panels). Most of the catches both in numbers and weight were from the west coast of Florida (Figure 7 top and middle panels). The sporadic live releases (B2) were mostly from Louisiana (Figures 6 and 7 bottom panels). We also calculated confidence intervals for A+B1 and B2 catches of smooth dogfish in the Atlantic and A+B1 catches of smooth dogfish in the Gulf of Mexico (Figure 8). 2.3 Bottom longline and gillnet dead discards and live post-release mortality Dead discard estimates will be obtained from the Coastal Fishery Logbook program and the Reef Fish Bottom Longline Observer Program and Gillnet Observer Program (GNOP), respectively (Carlson 214a,b). We will also account for live post-release mortality (the proportion of sharks released alive that die) in commercial gear by multiplying landings from gillnets and longlines by the percentage released alive in each of these gears (from observer programs) and the postrelease mortality rate estimated for each of these gears (Courtney 214). The proportion of smooth dogfish released alive was.33 (for the period 21-212 from the GNOP) for gillnets and the proportion of Mustelus spp. released alive was.57 (for the period 1994-212 from the BLLOP) for longline. Table 9 and Figure 9 summarize the disposition (action taken) of smooth dogfish from the GNOP and of Mustelus spp. from the BLLOP. It is assumed there are no animals observed to be released alive in the shrimp trawl fishery. 2.4 Shrimp trawl fishery discards Dead discard estimates from the shrimp trawl fishery in the Gulf of Mexico and Atlantic will be taken from Zhang et al. (214) and subsequent analyses. 2.5 Average size (length and weight) and length compositions The predicted average weight (lb whole weight) and observed fork length of Mustelus spp. from the BLLOP showed a slightly increasing trend from 1994 to 212 (Fig. 1). Average weight and fork length from the GNOP also showed an increasing trend from 25 to 212 for Mustelus spp. (Fig. 11). Average size information for smooth dogfish from the MRIP showed a very slight decreasing trend in length and a very slight increasing trend in weight (Fig. 12). Length-frequency distributions of Mustelus spp. observed in the BLLOP show that mostly mature individuals were caught (ca. 82 cm FL for sexes combined; Fig. 13). More Mustelus canis observed in the GNOP appeared to be mature than immature (Fig. 14). Recreationally caught smooth dogfish were mostly immature, but mature animals were also caught (Fig. 15). 4
Acknowledgments We thank the following people for providing data from several sources: G. Gaipo for commercial landings data, V. Matter for recreational catch data, A. Mathers for Gillnet Observer Program data, and M. Enzenhauer for Reef Fish and Shark Bottom Longline Observer Program data. We also thank J. Defilippi from the Atlantic Coastal Cooperative Statistics Program and A. Bianchi and S. McInermy from the North Carolina Department of Environment and Natural Resources for helping clarify issues from the ACCSP database and NC landings, respectively. References Carlson, JK. 214a. Bycatch estimates of Mustelus spp. in the reeffish bottom longline fishery. SEDAR39-DW-xx. SEDAR, North Charleston, SC. Carlson, JK. 214b. Bycatch estimates of Mustelus canis in the south Atlantic coastal gillnet fishery. SEDAR39-DW-xx. SEDAR, North Charleston, SC. Courtney, D. 214. A Preliminary review of post-release live-discard mortality rate estimates in sharks for use in SEDAR 39. SEDAR39-DW-21. SEDAR, North Charleston, SC Matter, V.M. and A. Rios. 213. MRFSS to MRIP adjustment ratios and weight estimation procedures for South Atlantic and Gulf of Mexico managed species. SEDAR32-DW- 2. SEDAR, North Charleston, SC. Zhang, X., E. Cortés, D. Courtney, and E. Scott-Denton. 214. Shrimp fishery bycatch estimates for smoothhound sharks in the Gulf of Mexico, 1972-212. SEDAR 39- DW-5. SEDAR, North Charleston, SC. 5
Table 1. Commercial landings (lb whole weight) of smooth dogfish in the Atlantic region. NE GCL is Northeast General Canvass Landings and ACCSP is Atlantic Coastal Cooperative Statistics Program. year NE gcd ACCSP Total landings 1982 7493 7493 24748 24748 1984 135 135 7864 7864 1986 4878 4878 69728 69728 1988 1642 1642 25143 25143 199 31776 31776 569572 732194 732194 1992 85448 1812297 1812297 73634 168469 168469 1994 66466 1762497 1762497 513538 2696337 2696337 1996 8983 1578134 1578134 455299 982797 982797 1998 62667 192116 192116 82182 1326997 1326997 2 73823 179259 179259 21 75126 1223791 1223791 22 185591 144241 144241 23 197765 148498 148498 24 1136639 1765486 1765486 25 56856 123639 123639 26 525852 114165 114165 27 84662 1658633 1658633 28 979655 181577 181577 14563 2714633 2714633 21 224492 39186 39186 211 175122 2793519 2793519 212 1243698 2239335 2239335 6
Table 2. Commercial landings (lb whole weight) of smooth dogfish in the Atlantic region by gear type. year BY HAND DIP NETS DREDGE FIXED NETS GILL NETS HAND LINE HAUL SEINESHOOK AND LINE LONG LINES NOT CODED OTHER GEARSPOTS AND TRAPS SPEARS AND GIGS TRAWLS 1982 7493 475 257 38 2378 1984 135 737 144 6983 1986 126 4752 7794 28 317 58799 1988 912 73 15 1143 199 2319 8586 67686 36 4669 1992 1751896 227 4177 1546616 1428 14837 1994 1564725 65 21426 211.2 4518 3587 34 1371 227 263883 4256.6 925 4265 1917 8 46583 1996 153412 632 756 234 197 235 43868 922865 1718 4 666 1469 9 46949 1998 867 738864 292 29 372 388 24861 366 14677 32 1256674 3 56 624 3675 926 148 5 64557 2 63 112549 128 4 8433 86 5742 21 6473 181385 152 1112 674 8933 223 4241 11923 22 86 13197 12517 484 24 2139 127 1592 3 153312 23 14462 12822 1354 754 18385 3287 387 16479 24 17 3643 29 1584542 31 274 448 14244 46775 9962 8988 9593 25 7 567 62 14122 3155 11 4758 5129 95274 717 5149 3374 26 4764 217 918482 118 1158 3522 14426 88988 2224 4743 183 27 9 37 326.4 3362 1313988 287 1769.4 6 16211 219724 25 74 98781 28 1831 2496 1337729 613 4 13395 383 237584 7213 174974.7 28547 4991 1854673 35 2154 7287 8642 398952 39 9996 29146 21 16442 1735 327477 5 16 4323 56914 545585 1317 232648.22 211 4339 27169 267545 346 1863 15464.67 361443 163 315186.6 212 1762 1525 152143 1 94 283 8862.22 52289 42 772 175789.1 Total 1,167 37 74,241 131,645 32,35,973 21,353 33,666 44,244 45,89 2,756,777 13,387 52,639 35 2,961,2 7
Table 3. Commercial landings (lb whole weight) of smooth dogfish in the Atlantic region by state of landing. year CT DE MA MD ME NC NJ NY RI SC VA 1982 7493 42 164 272 1437 1984 135 5794 881 1189 1986 186 4692 14 68193 362 622 411 1988 912 73 2512 41 199 275 7513 221 2653 44 18746 162627 53557 15864 1992 97 25994 959715 89664 7224 15689 978736 31518 4738 229587 1994 12795 233616 197837 11241 68 4848 3923 743 45 79766 2182799 139241 13 293613 1996 6 142621 46323 7886 5612 3128 892858 11245 74539 527498 212651 314 282 15148 1998 3237 489451 184223 21554 15896 8755 124751 5539 3997 457 43874 1777 337889 2 311 36458 335282 49589 23149 452 5954 264464 21 1919 792 71 27 51383 28885 11684 248 8283 297161 22 3128 131 137 1544 341672 248222 1496 3367 1478 664988 23 3524 273 14193 37356 86426 164879 4833 149 823634 24 6459 475 1281 1223 623696 213565 9693 3954 8776 25 3823 538 15263 9286 647578 97978 8878 8544 2119 35143 26 466 46 4526 14433 61247 89614 114165 463 5456 25439 27 1955 457 6386 9477 63896 77534 136 143 15597 79719 28 4375 432 1438 3 826274 186649 151252 946 281 59985 9991 32799 589 313619 122115 446419 158538 56653 19691 455184 21 1988 17352 1 31433 1614844 846916 258878 65334 367 793695 211 617 6486 25892 21228 1241252 732487 26737 21874 597 28571 212 2759 9 18 14455 98275 711527 233369 1697 2772 151883 Total 45,347 59,87 666,612 2,344,59 3,27 17,331,339 7,18,332 1,954,882 288,661 131,183 8,95,361 8
Table 4. Recreational catches (A+B1) of smooth dogfish in the Atlantic region in numbers and weight (lb whole weight). B2s are sharks released alive (in numbers). Total catches year MRIP HBOAT (number) (weight) B2s 12779 18 12797 483684 259744 1982 3258 9 3267 99148 55126 167992 7 16862 398513 14217 1984 3282 3282 1971 57449 16385 1 16395 363366 314483 1986 154158 81 154239 696378 472 17157 163 171733 424872 566682 1988 98337 19 98356 48454 312863 113197 67 113264 395156 612883 199 69366 69366 186795 52494 58244 38 58552 182571 49215 1992 6232 461 62781 179842 455512 9791 727 98637 294512 459827 1994 32878 356 33234 11893 45448 46339 48 46819 154399 429199 1996 29727 1214 3941 1 5872 49619 895 5514 161911 87398 1998 34119 727 34846 11258 67653 1591 41 1551 53793 7118 2 52995 47 5342 166651 777195 21 39261 632 39893 15755 15924 22 2467 159 25666 86144 962222 23 5164 343 5 186666 137429 24 14434 1239 15673 57662 1224213 25 47479 1569 4948 18273 1738714 26 1348 116 14496 48386 2111439 27 93718 123 94741 322588 1389123 28 47113 711 47824 16817 356 17496 65 1811 78672 134333 21 18166 1495 19661 56757 852882 211 1984 1237 2141 64792 78287 212 31527 142 31669 96736 13224 9
Table 5. Recreational catches (A+B1, numbers) of smooth dogfish by state. year AL CT DE FLE FLW GA LA MA MD ME MS NC NH NJ NY RI SC TX VA 28121 18 31212 16371 8489 969 26976 1982 1311 1561 3213 519 991 14242 1856 1718 2399 19378 63281 42677 19 2421 1984 1248 3136 19426 2346 2595 3184 85166 123629 114 12457 2562 3264 5276 95 216 1124 8578 71756 116 48 565 7933 1986 3248 77 356 674 94 64479 12273 1138 15114 741 438 5 29527 1 61 27744 92 2221 152 2698 257 92 2192 2168 71 81 8214 1988 29 5589 1747 1181 27661 6592 31965 175 685 416 8 457 14 1113 45896 1988 21314 9669 7696 1725 123 4945 71 1135 926 7161 199 32 2754 736 1988 39 335 298 23 2212 25716 3162 79 735 53 27794 184 61 2974 2479 1531 8854 362 124 148 1992 684 6224 257 56 626 449 11774 63 1412 11249 1965 375 1 3577 1833 2761 26 585 4186 5226 54772 1259 1158 318 3498 1994 1742 1499 6 4764 328 7788 285 259 3 1863 1 1979 5 377 264 4711 24638 1423 952 77 1996 5 5157 15156 399 6 1176 148 411 2382 3857 1697 3 63 2 13342 86 23 1469 29742 792 213 3197 165 1998 2 289 9811 61 71 128 1534 21472 88 599 437 265 1 374 1453 6147 839 2 557 1194 844 34474 169 184 797 21 7963 584 136 26431 1635 813 62 1 811 22 7284 2976 325 613 1292 1469 79 23 3767 4182 1 1375 642 2146 15383 5 5123 24 5457 31 335 236 2182 849 172 1 741 25 7571 5518 41 1543 9971 14543 7432 1346 2625 26 5939 15 28 2269 1222 4175 56 771 2 21 27 882 67 22 25 3514 21775 815 44778 5853 28 283 15411 445 35 3378 13615 9697 668 4292 6895 281 39 963 5146 532 1725 21 97 273 4 13 1 156 185 1959 443 1458 19 2111 211 277 66 6 127 3152 5683 112 8198 212 396 1258 2.45346 247 27554 71 698 Total 4,46 67,575 38,554 22,883 35,898 1,578 4,821 179,562 174,711 19,49 11,48 217,868 5,5 657,829 272,785 5,163 79,979 86 192,321 1
Table 6. Recreational catches (A+B1, lb whole weight) of smooth dogfish by state. year AL CT DE FLE FLW GA LA MA MD ME MS NC NH NJ NY RI SC TX VA 13371 99.27 144699 72184 25676 2964 81589.64 1982 39352 6883 9719 15697 27497.46 29565 822 1412 4981 85447 131372 88597 9.5791 5259.12 1984 3776 13828 11774 94326 75899 13392 257587 373918 5286.182 54926 77433.47 1513 31976 419 74 5211 37822 233896 35876 2115 3424 25857 1986 15599 289 21574 2971 57 298924 95439 54118 5276 72593 35548 1961 89 113659 43 2828 56416 23 13463 23449 16354 11267 426 4458 449 26 465 1673 1988 155 2591 52838 5195 128236 3562 14943 811 2718 1858 43 1383 98 516 132277 8767 98813 2545 53318 75864 5576 1316 1869 526.13 4255 18849 199 23 61721 3247 125 18235 1532 7389 1139 1255 65342 833 3482 1867 487 74497 619 2649 13789 1929 48537 28589 1679.379 84 479 1992 4145 28855 48539 826 3794 118 54585 3653 6196 25499 4454 176 6 819 11111 77415 287 2711 1299 2381 158323 3638 5367.944 148 111 1994 159 513 26 21252 11166 26511 1322.353 1255 51 6341 5 3328 29 14263 8 259 74519 435 4357 2328 1996 52 2396 4584 1848 62 5451 3169 2488 1787 11666 864 31 189 15 4353 614 144 6377 89955 2396 989.1279 1694 499 1998 17 134 29673 522 487 388 683 64944 4261 1813 1229 11684 4 1132 6374 18591 3799 2 16657 5266 357 14268 4865 7919 2416 21 1 2575 4567 65753 467 3769.978 3194 6 217 22 223 13123 984 3452 3976 7238 24 23 17466 14637 6 4814 2566 75114 53843 287 17933 24 1656 326 1532 965 6598 2568 538 1 224 25 3511 17776 423 9354 43954 46852 23943 6224 8456 26 17964 69 122 6862 5458 12628 26.3797 496 1 63 27 17711 2676 96 4393 16587 47717 17761 2282.4 12826 28 1312 4917 1975 118 15154 4631 32784 752.55 1451 3751 12349 412 4449 18892 5488.539 6332 21 45 724 61 197 214 6947 858 23433 947 12112.13 1252 4513 211 6536 12 91 588 1413 13719 8934.67 19791.52 212 9365 7624 11.35983 1326 83339 582.673 2112.459 Total 46,718 181,195 878,171 141,191 232,378 9,476 39,983 55,27 81,484 54,557 11,725 1,364,411 19,755 2,162,415 532,357 1,117 18,3 374,61 5,934 11
Table 7. Recreational catches (B2, numbers) of smooth dogfish by state. year AL CT DE FLE FLW GA LA MA MD ME MS NC NH NJ NY RI SC TX VA 14811 1147 85159 98147 46154 466 1982 13485 182911 2174 13553.74635 35174 57156 9354 1336 3143 2629 12162 143 5359 785787 5833 476677 1984 3666 565 1831 15172 16679 1637 93333 16727 2646 651 1277 3142 7729 3745 31576 221342 17559 9957 1986 11695 64719 2188 427 168347 73456 9358 35366 8479 115298 338 32364 548 6446 285 22339 23496 9877 1988 1712 11798 2226 2755 1181 116758 261 276 379 3391 6122 426615 1434 49296 13 87349 13233 18422 258 5565 513 823 199 151 183945 487 16978 2687 1557 4127 986 236254 14184 1584 557 1827 1269 158323 3911 1754 56 53759 25834 21194 461 121 1992 1558 132625 11511.42322 24275 9261 128 6816 19361 25495 314 1681 13758 164574 1234 1819 265 1866 229938 11489 726 14358 1994 167 1387 1833 5322 2343 22128 37572 221 1184 831 492 1148 4261 5516 88293 27621 661 167 1996 5861 21579 12419 2548 164 13893 276138 5831 972 29114 24715 1145 47347 7125 2653 24835 41913 699 39 3344 131 1998 68 181613 276 11549 23649 374242 7352 7387 929 7258 167995 1381 13499 5833 8844 471625 17456 992 2432 372 2 71 156894 11493 576 6397 3845 531743 1634 1756 838 21 16314 393418 798 3897 6998 11727 5293 286 5747 22 27672 17464 2487 92 5328 36784 616829 4777 31873 23 22978 181563 149 92.1581398 668 8256 19762 966856 7555 173 7391 24 23 226875 6361 127 16864 636546 112815 44 346 76936 25 16638 4716 21564 11155 7249 18796 81798 19626 44 65395 8479 26 4176 398498 7352 91 2185 3283 1668 1148293 49986 116 256 4873 27 26917 22233 54 4686 178 34958 876127 59821 18 4465 1898 28 145 27114 6824 41 4214 41265 15766 26556 2418 13685 4418 1635 182659 1142 133.9563 21394 1312 2 642527 48786 116 1689 89569 21 657 165764 479.29572 342 28622 5536 29 485242 11444 382 3949 95266 211 679 774 114 12268.81752 95873 576652 5659.19119 43 288 1769 212 88526 12988.89547 112.888196 3951 868143 31264.44611 18493 7771 Total - 37,213 5,736,797 15,845-4,57 14,746 445,159 62,454 2,245 1,613 2,23,813 17,313 14,899,728 1,679,143 42,428 296,68-1,235,832 12
Table 8. Recreational catches (A+B1) of smooth dogfish in the Gulf of Mexico region in numbers and weight (lb whole weight). B2s are sharks released alive (in numbers). Total catches year MRIP HBOAT TXPWD (number) (weight) B2s 1982 1718 1718 1412 1984 19426 19426 11774 5841 565 646 354 3142 1986 3659 5 3664 22233 51 25 66 511 3325 548 1988 37 37 74 197 771 14 7724 53416 199 529 32 561 3488 53 53 16 487 1992 1913 2 1915 11598 11511 1833 8 1841 11111 1994 1745 6 1751 1641 1 1 2 5 1996 419 8 427 2572 164 2 2 4 15 1998 2 2 4 17 2 21 1 1 2 6 22 23 92 24 1 1 2 1 25 1543 1543 9354 26 2 2 4 1 27 28 21 19 11 179 38 1252 211 212 1258 1258 7624 13
Table 9. Disposition (action taken) for smooth dogfish from the GNOP (top) and for Mustelus spp. from the BLLOP (bottom) by year. Kept Released alive Discarded dead 21 27 25 1 26 24 9 2 27 78 231 28 1843 49 989 25 7 21 7 817 17 211 75 52 4 212 649 17 2 total 3728 1848 33 year Finned and carcass disc Kept Kept as bait Lost at surface Released alive Discarded dead Unknown 1994 27 2 2 1 1996 13 1 1 3 2 1998 2 41 31 12 1 3 16 1 21 6 156 22 1 18 47 7 23 2 288 1 6 2 24 81 4 25 9 14 5 5 26 2 1 13 6 3 27 1 1 42 28 1 26 1 533 14 5 1 5 3 1 21 4 2 1 136 8 211 35 16 57 5 1 212 61 1 443 4 total 2 185 728 5 1365 1 3 14
Landings (lb dw) 45 4 35 3 25 2 15 1 5 Smooth dogfish commercial landings (Atlantic) ACCSP+NE Figure 1. Commercial landings of smooth dogfish in the Atlantic region, 1982-212. 15
Atlantic landings (NE+ACCSP) of smooth dogfish by gear Landings (lb rw) 45 4 35 3 25 2 15 1 5 TRAWLS SPEARS AND GIGS POTS AND TRAPS OTHER GEARS NOT CODED LONG LINES HOOK AND LINE HAUL SEINES HAND LINE GILL NETS FIXED NETS DREDGE 1982 1984 1986 1988 199 1992 1994 1996 1998 2 22 24 26 28 21 212 DIP NETS AND CAST NETS BY HAND Figure 2. Commercial landings of smooth dogfish in the Atlantic region by gear type. 16
Atlantic landings (NE+ACCSP) of smooth dogfish by state VA Landings (lb rw) 45 4 35 3 25 2 15 SC RI NY NJ NC ME MD 1 5 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 MA DE CT Figure 3. Commercial landings of smooth dogfish in the Atlantic region by state of landing. 17
35 Smooth dogfish recreational catches, numbers (Atlantic) MRFSS+HBOAT 3 25 2 15 1 5 21 Catches (A+B!, numbers) 23 25 27 211 12 Smooth dogfish recreational catches, weight (Atlantic) MRFSS+HBOAT Catches (A+B!, weight) 1 8 6 4 2 21 23 25 27 211 25 Smooth dogfish recreational live discards (Atlantic) MRFSS Catches (B2, numbers) 2 15 1 5 21 23 25 27 211 Figure 4. Recreational catches of smooth dogfish in the Atlantic region in numbers (A+B1, top), weight (lb ww, A+B1, middle), and numbers (B2, bottom). 18
35 3 25 Recreational catches of smooth dogfish by state, ATL, numbers VA SC RI NY NJ A+B1 catches (numbers) 2 15 1 5 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 NH NC ME MD MA GA FLE DE CT A+B1 catches (lb whole weight) 12 1 8 6 4 2 Recreational catches of smooth dogfish by state, ATL, weight VA SC RI NY NJ NH NC ME MD MA GA FLE DE CT 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 B2 catches (numbers) 25 2 15 1 5 Live discards of smooth dogfish by state, ATL, numbers VA SC RI NY NJ NH NC ME MD MA GA FLE DE CT 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 Figure 5. Recreational catches of smooth dogfish in the Atlantic region by state in numbers (A+B1, top), weight (lb ww, A+B1, middle), and numbers (B2, bottom). 19
3 Smooth dogfish recreational catches (GOM) MRFSS+HBOAT+TXPWD 25 2 15 1 5 21 Catches (A+B!, numbers) 23 25 27 211 12 Smooth dogfish recreational catches (GOM) MRFSS+HBOAT+TXPWD Catches (A+B!, weight) 1 8 6 4 2 21 23 25 27 211 Smooth dogfish recreational live discards (GOM) MRFSS Catches (B2, numbers) 12 1 8 6 4 2 Figure 6. Recreational catches of smooth dogfish in the Gulf of Mexico region in numbers (A+B1, top), weight (lb ww, A+B1, middle), and numbers (B2, bottom). 2
Recreational catches of smooth dogfish by state, GOM, numbers 25 TX 2 MS A+B1 catches (numbers) 15 1 5 LA FLW 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 AL Recreational catches of smooth dogfish by state, GOM, weight 14 TX 12 1 MS A+B1 catches (lb whole weight) 8 6 4 2 LA FLW 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 AL Live discards of smooth dogfish by state, GOM, numbers 14 TX 12 1 MS B2 catches (numbers) 8 6 4 2 LA FLW 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 Figure 7. Recreational catches of smooth dogfish in the Gulf of Mexico region by state in numbers (A+B1, top), weight (lb ww, A+B1, middle), and numbers (B2, bottom). 21 AL
Recreational catches of smooth dogfish, ATL, A+B1, with 95% CIs 7 6 ATL LCL UCL 5 4 3 2 1 21 23 Catches (A+B1, numbers) 25 27 211 Recreational live discards of smooth dogfish, ATL, B2, with 95% CIs ATL LCL UCL 35 3 25 2 15 1 5 Recreational catches of smooth dogfish, GOM, A+B1, with 95% CIs 35 GOM LCL UCL 3 25 2 15 1 5 21 23 25 27 211 Catches (A+B1, numbers) 21 23 25 27 211 Catches (A+B1, numbers) Figure 8. Variability (as 95% CIs) in estimates of recreational catches of smooth dogfish in the Atlantic (A+B1, numbers, top; B2, numbers, middle) and Gulf of Mexico (A+B1, bottom). 22
1% Disposition of Mustelus canis from the GNOP Percent 9% 8% 7% 6% 5% 4% 3% 2% 1% %Discarded dead %Dicarded alive %Kept % 21 25 26 27 28 21 211 212 Disposition of Mustelus spp. from the BLLOP Percent 1% 9% 8% 7% 6% 5% 4% 3% 2% 1% % 1994 1996 1998 21 22 23 24 25 26 27 28 21 211 212 Unknown Discarded dead Released alive Lost at surface Kept as bait Kept Finned and carcass disc Figure 9. Disposition (action taken) for smooth dogfish from the Gillnet Observer Program (GNOP; top) and for Mustelus spp. from the Reef Fish and Shark Bottom Longline Observer Programs (BLLOP; bottom) by year. 23
Average weight (lbs. round wt) 2. 18. 16. 14. 12. 1. 8. 6. 4. 27 3 14 5 68 16 289 82 4 25 53 574 58 15 111 544 2.. 1994 1996 1998 2 22 24 26 28 21 212 12 Average length (FL, cm) 1 8 6 4 2 1994 1996 1998 2 22 24 26 28 21 212 Figure 1. Average weight (top) and length (bottom) of Mustelus spp. observed in the Reef Fish and Shark Bottom Longline Observer Programs (BLLOP). Error bars represent +/- one standard error; sample sizes are indicated in the top panel. 24
Average weight (lb round wt) 14. 12. 1. 8. 6. 4. 2. 1 1 15 16 27 78 27 156. 25 26 27 28 21 211 212 Average length (FL, cm) 1 9 8 7 6 5 4 3 2 1 25 26 27 28 21 211 212 Figure 11. Average weight (top) and length (bottom) of Mustelus canis observed in the Gillnet Observer Program (GNOP). Error bars represent +/- one standard error; sample sizes are indicated in the top panel. 25
7. 6. 5. 4. 3. 2. 1.. 9. 8. 7. 6. 5. 4. 3. 2. 1.. 21 23 25 27 211 21 23 25 27 211 Average weight (lbs. round wt) 8 26 73 43 37 43 66 65 137 45 59 58 136 67 42 33 27 57 27 17 45 18 51 34 14 24 61 15 52 147 4 74 Average length (FL, cm) Figure 12. Average weight (top) and length (bottom) of Mustelus canis observed in the Marine Recreational Information Program (MRIP). Error bars represent +/- one standard error; sample sizes are indicated in the top panel 26
Length compositions of Mustelus spp. (BLLOP) Count 18 16 14 12 1 8 6 4 2 1994 212 26 23 1994 1996 1998 23 24 25 26 27 28 21 211 212 FL (cm) Figure 13. Length-frequency distribution of Mustelus spp. from the Reef Fish and Shark Bottom Longline Observer Programs (BLLOP). The arrow indicates the approximate midpoint of length at maturity for males and females combined. Note that lengths are fork lengths. 27
Length compositions of Mustelus canis (GNOP) 25 12 26 Count 1 8 6 4 27 28 2 211 27 25 21 211 212 FL (cm) Figure 14. Length-frequency distribution of Mustelus canis from the Gillnet Observer Program (GNOP). The arrow indicates the approximate midpoint of length at maturity for males and females combined. Note that lengths are fork lengths. 28
Count Length compositions of Mustelus canis, Recreational (MRIP) 6 5 4 3 2 22 1 1988 FL (cm) 1982 1984 1986 1988 199 1992 1994 1996 1998 2 21 22 23 24 25 26 27 28 21 211 212 Figure 15. Length-frequency distribution of Mustelus canis from the MRIP. The arrow indicates the approximate midpoint of length at maturity for males and females combined. Note that lengths are fork lengths. 29