Comparative analysis of depth distribution for seventeen large pelagic fish species captured in a longline fishery in the central-eastern Pacific Ocean

Jiangfeng Zhu; Liuxiong Xu; Xiaojie Dai; Xinjun Chen; Yong Chen

doi:10.3989/scimar.03379.16C

Autores/as

Jiangfeng Zhu College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education - School of Marine Sciences, University of Maine
Liuxiong Xu College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education
Xiaojie Dai College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education
Xinjun Chen College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education
Yong Chen The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education - School of Marine Sciences, University of Maine

DOI:

https://doi.org/10.3989/scimar.03379.16C

Palabras clave:

peces pelágicos, atunes, bycatch, distribución vertical, palangre, océano Pacífico

Resumen

El objetivo de este estudio ha sido estimar la distribución en profundidad de especies pelágicas capturadas en una pesquería de palangre y evaluar la diferencia en la distribución en profundidad entre las especies. Se estimó la distribución en profundidad para 17 especies capturadas frecuentemente, sobre la base de los datos obtenidos en una marea de una pesquería de palangre china dirigida al patudo (Thunnus obesus) en el océano Pacífico centro-oriental, durante febrero-noviembre 2006. Las distribuciones en profundidad de 13 especies no objetivo de la pesquería fueron significativamente diferentes de la del patudo. Aunque la mayoría de estas 13 especies se encontraron a menor profundidad que el patudo, la medida en la que la captura acompañante disminuye puede ser diferente al situar los anzuelos a mayor profundidad. En 7 de las especies no se encontraron diferencias significativas entre sexos en relación a la distribución en profundidad. No hubo correlación significativa entre los tamaños de los peces y las profundidades de captura. La información derivada de este estudio puede jugar un rol importante en la reducción de la captura acompañante de pesquerías pelágicas con palangre dirigidas a captura de atunes en el océano Pacífico centro-oriental.

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Citas

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