Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean
The choice of bait is one of the fisheries tactics used to increase selectivity for particular target species. The performance of three bait types (mackerel, sardine, squid) was evaluated with a commercial vessel operating in the Equatorial Atlantic Ocean using the deep-set pelagic longline deployme...
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Instituto de Pesca
2022-05-01
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| Series: | Boletim do Instituto de Pesca |
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| Online Access: | https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1678 |
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| author | Tiago Hilário Pedrosa CAMPELLO Lucas Eduardo COMASSETTO Humberto GOMES HAZIN José Carlos PACHECO DOS SANTOS David KERSTETTER Fábio Hissa Vieira HAZIN |
| author_facet | Tiago Hilário Pedrosa CAMPELLO Lucas Eduardo COMASSETTO Humberto GOMES HAZIN José Carlos PACHECO DOS SANTOS David KERSTETTER Fábio Hissa Vieira HAZIN |
| author_sort | Tiago Hilário Pedrosa CAMPELLO |
| collection | DOAJ |
| description | The choice of bait is one of the fisheries tactics used to increase selectivity for particular target species. The performance of three bait types (mackerel, sardine, squid) was evaluated with a commercial vessel operating in the Equatorial Atlantic Ocean using the deep-set pelagic longline deployment method to target large yellowfin and bigeye tunas. The effect of different factors and covariates on the Capture per Effort Unit - CPUE was evaluated through Generalized Linear Models (GLM). In 121 experimental sets using three bait types, 2385 individuals of the two target species were captured, 1166 yellowfin tuna and 1219 bigeye tuna. The results suggest a preference between bait types for each target species, with the yellowfin tuna being mostly caught by the hooks using squid and bigeye tuna with fish bait mackerel. Stratifying the results for three depth ranges of the hooks, the combination of bait and depth for yellowfin tuna resulted in an increase of catch probability in the intermediary depth layer using mackerel. For bigeye tuna, using mackerel in the intermediary layer resulted in a reduction in the catch rate. Bycatch represented around 11.15% of total captures. These results will provide important information to choosing the most efficient bait for the pelagic longline fishing operation and will help future decisions of fisheries management. |
| format | Article |
| id | doaj-art-bc12e322789741fcacb8a0f8d9cc07a0 |
| institution | DOAJ |
| issn | 1678-2305 |
| language | English |
| publishDate | 2022-05-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj-art-bc12e322789741fcacb8a0f8d9cc07a02025-08-20T03:22:53ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052022-05-01481710.20950/1678-2305/bip.2022.48.e678Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic OceanTiago Hilário Pedrosa CAMPELLO0https://orcid.org/0000-0002-9480-5146Lucas Eduardo COMASSETTO1https://orcid.org/0000-0002-3959-2846Humberto GOMES HAZIN2https://orcid.org/0000-0002-5999-2230José Carlos PACHECO DOS SANTOS3https://orcid.org/0000-0003-2956-470XDavid KERSTETTER4https://orcid.org/0000-0002-4440-8767Fábio Hissa Vieira HAZIN5https://orcid.org/0000-0003-3755-5379Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aquicultura - Recife (PE), Brazil.Instituto Federal de Educação, Ciência e Tecnologia de Roraima - Amajari (RR), Brazil.Universidade Federal Rural do Semiárido – Mossoró (RN), Brazil.Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aquicultura, Unidade Acadêmica de Serra Talhada - Serra Talhada (PE), Brazil.Halmos College of Natural Sciences and Oceanography / Nova Southeastern University - Dania Beach (FL), USA.Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aquicultura - Recife (PE), Brazil.The choice of bait is one of the fisheries tactics used to increase selectivity for particular target species. The performance of three bait types (mackerel, sardine, squid) was evaluated with a commercial vessel operating in the Equatorial Atlantic Ocean using the deep-set pelagic longline deployment method to target large yellowfin and bigeye tunas. The effect of different factors and covariates on the Capture per Effort Unit - CPUE was evaluated through Generalized Linear Models (GLM). In 121 experimental sets using three bait types, 2385 individuals of the two target species were captured, 1166 yellowfin tuna and 1219 bigeye tuna. The results suggest a preference between bait types for each target species, with the yellowfin tuna being mostly caught by the hooks using squid and bigeye tuna with fish bait mackerel. Stratifying the results for three depth ranges of the hooks, the combination of bait and depth for yellowfin tuna resulted in an increase of catch probability in the intermediary depth layer using mackerel. For bigeye tuna, using mackerel in the intermediary layer resulted in a reduction in the catch rate. Bycatch represented around 11.15% of total captures. These results will provide important information to choosing the most efficient bait for the pelagic longline fishing operation and will help future decisions of fisheries management.https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1678bigeye tunabycatchglmselectivityyellowfin tuna |
| spellingShingle | Tiago Hilário Pedrosa CAMPELLO Lucas Eduardo COMASSETTO Humberto GOMES HAZIN José Carlos PACHECO DOS SANTOS David KERSTETTER Fábio Hissa Vieira HAZIN Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean Boletim do Instituto de Pesca bigeye tuna bycatch glm selectivity yellowfin tuna |
| title | Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean |
| title_full | Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean |
| title_fullStr | Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean |
| title_full_unstemmed | Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean |
| title_short | Comparative analysis of three bait types in deep-set pelagic longline gear in the Equatorial Atlantic Ocean |
| title_sort | comparative analysis of three bait types in deep set pelagic longline gear in the equatorial atlantic ocean |
| topic | bigeye tuna bycatch glm selectivity yellowfin tuna |
| url | https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1678 |
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