Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000

Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000

An analysis is made of the catch, effort and catch per unit effort (CPUE) of the incidental capture of billfish and other species by longline vessels in eastern Venezuela. The information was based on fishing logbooks from 1986 to 2000. The fishing grounds were divided into two sectors according to...

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Главные авторы: Marcano, JS, Lárez, A, Gutiérrez, X, Alió, JJ, Salazar, H, Márquez, M
Формат: Online
Язык:eng
Опубликовано: Iniversidad Autónoma de Baja California 2004
Online-ссылка:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/107
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id oai:cienciasmarinas.com.mx:article-107
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Marcano, JS
Lárez, A
Gutiérrez, X
Alió, JJ
Salazar, H
Márquez, M
spellingShingle Marcano, JS
Lárez, A
Gutiérrez, X
Alió, JJ
Salazar, H
Márquez, M
Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
author_facet Marcano, JS
Lárez, A
Gutiérrez, X
Alió, JJ
Salazar, H
Márquez, M
author_sort Marcano, JS
title Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
title_short Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
title_full Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
title_fullStr Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
title_full_unstemmed Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000
title_sort incidental catch of billfish and other species by venezuelan longline vessels in the caribbean sea and western atlantic ocean: period 1986-2000
description An analysis is made of the catch, effort and catch per unit effort (CPUE) of the incidental capture of billfish and other species by longline vessels in eastern Venezuela. The information was based on fishing logbooks from 1986 to 2000. The fishing grounds were divided into two sectors according to the different hydrological regimes: the Caribbean Sea (11º–17ºN, 61º–75W) and the western Atlantic Ocean (5º–17ºN, 50º–60ºW). The number of vessels in the fleet increased from 9 to 41 units between 1986 and 1996. Tunas were the dominant group in the landings, representing on average 73.2% in the Caribbean Sea and 78.8% in the Atlantic Ocean. Yellowfin tuna (Thunnus albacares) was the most important species, accounting for 67.4% and 56% of the total weight captured in the Caribbean Sea and Atlantic Ocean, respectively. The incidental catch was composed of white marlin (Tetrapturus albidus), sail fish (Istiophorus albicans), blue marlin (Makaira nigricans), sword fish (Xiphias gladius), dolphinfish (Coryphaena hippurus), and sharks (mainly Carcharhinus spp. and Isurus spp.). White marlin and blue marlin presented asimilar pattern of variation and a sustained decrease in average yearly CPUE during the study period. For both species, CPUE seasonality was strong and more evident in the Caribbean, with a minimum in June and August. Blue marlin showed the highest yields per unit of effort (1.7 kg/100 hooks/day) in both sectors; dolphinfish showed similar CPUE values in both sectors, while the yields of sword fish were higher in the Caribbean Sea and those of sharks were higher in the Atlantic Ocean. The average annual CPUE of white marlin and several shark species showed significant differences between the Caribbean Sea and Atlantic Ocean sectors. The changes in abundance of the species seem to be associated with feeding migratory movements.
publisher Iniversidad Autónoma de Baja California
publishDate 2004
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/107
_version_ 1715723922602721280
spelling oai:cienciasmarinas.com.mx:article-1072019-04-12T20:45:01Z Incidental catch of billfish and other species by Venezuelan longline vessels in the Caribbean Sea and western Atlantic Ocean: Period 1986-2000 Captura incidental de agujas y otras especies por palangreros venezolanos en el Mar Caribe y Océano Atlántico occidental: Periodo 1986–2000 Marcano, JS Lárez, A Gutiérrez, X Alió, JJ Salazar, H Márquez, M incidental catch billfish CPUE Caribbean Sea Atlantic Ocean longline fisheries captura incidental peces de pico CPUE Mar Caribe Océano Atlántico palangre An analysis is made of the catch, effort and catch per unit effort (CPUE) of the incidental capture of billfish and other species by longline vessels in eastern Venezuela. The information was based on fishing logbooks from 1986 to 2000. The fishing grounds were divided into two sectors according to the different hydrological regimes: the Caribbean Sea (11º–17ºN, 61º–75W) and the western Atlantic Ocean (5º–17ºN, 50º–60ºW). The number of vessels in the fleet increased from 9 to 41 units between 1986 and 1996. Tunas were the dominant group in the landings, representing on average 73.2% in the Caribbean Sea and 78.8% in the Atlantic Ocean. Yellowfin tuna (Thunnus albacares) was the most important species, accounting for 67.4% and 56% of the total weight captured in the Caribbean Sea and Atlantic Ocean, respectively. The incidental catch was composed of white marlin (Tetrapturus albidus), sail fish (Istiophorus albicans), blue marlin (Makaira nigricans), sword fish (Xiphias gladius), dolphinfish (Coryphaena hippurus), and sharks (mainly Carcharhinus spp. and Isurus spp.). White marlin and blue marlin presented asimilar pattern of variation and a sustained decrease in average yearly CPUE during the study period. For both species, CPUE seasonality was strong and more evident in the Caribbean, with a minimum in June and August. Blue marlin showed the highest yields per unit of effort (1.7 kg/100 hooks/day) in both sectors; dolphinfish showed similar CPUE values in both sectors, while the yields of sword fish were higher in the Caribbean Sea and those of sharks were higher in the Atlantic Ocean. The average annual CPUE of white marlin and several shark species showed significant differences between the Caribbean Sea and Atlantic Ocean sectors. The changes in abundance of the species seem to be associated with feeding migratory movements. Se efectuó un análisis de la captura, el esfuerzo y la captura por unidad de esfuerzo (CPUE) en la pesca incidental de peces de pico y otras especies por palangreros del oriente de Venezuela, sobre la base de la información de las bitácoras de pesca en el periodo 1986–2000. El área total de pesca se dividió en dos sectores atendiendo a los distintos regímenes hidrológicos: Mar Caribe (11º–17ºN y 61º–75ºW ) y Océano Atlántico (5º–17ºN y 50º–60ºW). La flota aumentó de 9 hasta 41 unidades entre 1986 y 1996. Los túnidos conformaron el grupo dominante en los desembarques, con promedios de 73.2% en el Caribe y 78.8% en el Atlántico. El atún aleta amarilla (Thunnus albacares) fue la especie más importante, aportando 67.4% y 56% del total en peso capturado en los sectores Caribe y Atlántico, respectivamente. La captura incidental estuvo conformada por aguja blanca (Tetrapturus albidus), pez vela (Istiophorus albicans), aguja azul (Makaira nigricans), pez espada (Xiphias gladius), dorado (Coryphaena hippurus) y tiburones (mayormente Carcharhinus spp. e Isurus spp.). La aguja blanca y la aguja azul presentaron un patrón similar de variación y una declinación sostenida de la CPUE anual media en el periodo estudiado. La estacionalidad de la CPUE de ambas especies es marcada, y más evidente en el Caribe, con un mínimo entre junio y agosto. La aguja azul presentó la mayor CPUE (1.7 kg/100 anzuelos/día) de ambas zonas; el dorado registró similar CPUE en ambos sectores; la de pez espada fue más elevada en el Caribe y la de los tiburones en el Atlántico. Las CPUE medias anuales de la aguja blanca y los tiburones pelágicos, mostraron diferencias significativas entre los sectores Caribe y Atlántico. Las variaciones en abundancia de las especies están posiblemente asociadas con fenómenos migratorios alimentarios. Iniversidad Autónoma de Baja California 2004-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/107 10.7773/cm.v30i12.107 Ciencias Marinas; Vol. 30 No. 1B (2004); 201-217 Ciencias Marinas; Vol. 30 Núm. 1B (2004); 201-217 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/107/87

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