A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery |
| |
| Authors: | J.C. Pacheco D.W. Kerstetter F.H. Hazin Humberto Hazin R.S.S.L. Segundo J.E. Graves F. Carvalho P.E. Travassos |
| |
| Affiliation: | 1. Unidade Acadêmica de Serra Talhada, Universidade Federal Rural de Pernambuco, Fazenda Saco, s/n° CEP 56912-000, Serra Talhada/PE, Brazil;2. Nova Southeastern University Oceanographic Center, 8000 North Ocean Drive, Dania Beach, FL 33004, USA;3. Laboratório de Oceanografia Pesqueira, Departamento de Pesca e Aqüicultura, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros s/n Dois Irmados CEP 52171-900, Recife/PE, Brazil;4. Department of Fisheries Science, Virginia Institute of Marine Science, College of William and Mary, P.O. Box 1346, Gloucester Point, VA 23062, USA;5. Florida Program for Shark Research, Florida Museum of Natural History, P.O. Box 117800 Gainesville, Florida 32611-7800, USA;6. Program of Fisheries and Aquatic Sciences - School of Forest Resource and Conservation. University of Florida, 7922 NW 71st Street, Gainesville, Florida 32653, USA;1. Washington Sea Grant, University of Washington, Box 355020, Seattle, WA 98195, USA;2. TerraStat Consulting Group, 323 Union Avenue, Snohomish, WA 98290, USA;1. Instituto Español de Oceanografía, P.O. Box 1373, 38180 Santa Cruz de Tenerife, Spain;2. Instituto Español de Oceanografía, P.O. Box 130, 15080 A Coruña, Spain;1. School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, UK;2. Departamento de Zoología y Antropología Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain;3. Grupo de Recursos Marinos y Pesquerías, Facultad de Ciencias, Universidade da Coruña, 15008 A Coruña, Spain;4. Dipartimento di Ecologia, Università della Calabria, 87030 Rende CS, Italy;5. Barrabés Next, C. Serrano 16-1, 28001 Madrid, Spain;1. National Research Institute of Far Seas Fisheries, 5-7-1 Orido, Shimizu, Shizuoka 424-8633, Japan;2. Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan;1. Quantitative Ecology and Resource Management, Box 352182, University of Washington, Seattle, WA, 98195-5020, United States;2. International Pacific Halibut Commission, 2320 West Commodore Way, Suite 300, Seattle, WA, 98199-1287, United States |
| |
| Abstract: | Catch composition, catch rates, hooking location, and status at release at haulback were monitored during 81 experimental sets (launches and hauling fishing per day) in a commercial pelagic longline fishery targeting tuna in the equatorial South Atlantic Ocean. Circle hooks (size 18/0, 0° offset) and J-style hooks (size 9/0, 10° offset) with squid baits were deployed in an alternating fashion. The catch composition was not significantly different for most species between the two types of hooks, except for bigeye tuna, which showed a significantly higher proportion of catches on the circle hook (p ? 0.001) and for sailfish, pelagic stingray, and leatherback sea turtle, which had higher catch rates on the J-style hook (p = 0.018, p ? 0.001, and p = 0.044, respectively). Bigeye and yellowfin tuna showed significantly higher rates of survival at the time of gear retrieval with circle hooks, and circle hooks hooked bigeye tuna, yellowfin tuna, swordfish, and sailfish significantly more often externally than internally. Our results suggest that the use of size 18/0, 0° offset circle hooks in the equatorial pelagic longline fishery may increase the survival of bycatch species at the time of gear retrieval with minimal effects on the catches of target species. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
