Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource

Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource

The structure of the northern anchovy population before the disturbance caused by “El Niño” in 1982-1983 is analyzed. 20,205 age data originated from biological sampling of the commercial catches in Baja California throughout the 1978-1982 period were processed, and the results are presented here. T...

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Glavni autor: Vidal-Talamantes, R
Format: Online
Jezik:eng
Izdano: Iniversidad Autónoma de Baja California 2021
Online pristup:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/818
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spelling oai:cienciasmarinas.com.mx:article-8182013-08-19T03:29:29Z Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource Variaciones en la composición por edades de la captura de anchoveta (Engraulis mordax) y alternativas para el manejo del recurso Vidal-Talamantes, R The structure of the northern anchovy population before the disturbance caused by “El Niño” in 1982-1983 is analyzed. 20,205 age data originated from biological sampling of the commercial catches in Baja California throughout the 1978-1982 period were processed, and the results are presented here. The year classes responsible for the catch in 1979-1981 are identified. It is established that the one year old group has been the main catch generator. The age composition variability is described and a situation of capture of young individuals is observed. It is suggested to limit the capture of individuals younger than one year with the purpose of allowing a higher biomass incorporation by the growth process. The year class and recruitment concepts as well as their relation to vulnerability and social behavior processes are discussed. Se analiza la estructura de la población de anchoveta antes de la perturbación causada por el fenómeno de “El Niño” durante 1982-1983. Se presentan los resultados del procesamiento de 20,205   datos de   edad provenientes de muestreos biológicos de la captura comercial en Baja California durante el período 1978-1982. Se identifican las clases anuales responsables de las capturas de 1979-1981. Se establece que el grupo de un año de edad ha sido el principal generador de captura. Se describe la variabilidad de la composición por edades y se observa una situación de pesca de individuos jóvenes. Se sugiere que se limite la captura de peces menores de un año de edad, con el objeto de permitir una mayor incorporación de biomasa por efecto del proceso de crecimiento. Se discute sobre los conceptos de clase anual y reclutamiento y su relaci6n con procesos como vulnerabilidad y comportamiento social. Iniversidad Autónoma de Baja California 2021-02-16 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/818 10.7773/cm.v17i3.818 Ciencias Marinas; Vol. 17 No. 3 (1991); 73-89 Ciencias Marinas; Vol. 17 Núm. 3 (1991); 73-89 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/818/420420528 Copyright (c) 2021 Ciencias Marinas
institution Ciencias Marinas
collection OJS
language eng
format Online
author Vidal-Talamantes, R
spellingShingle Vidal-Talamantes, R
Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
author_facet Vidal-Talamantes, R
author_sort Vidal-Talamantes, R
title Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
title_short Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
title_full Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
title_fullStr Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
title_full_unstemmed Variations in the age composition of catch of anchovy (Engraulis mordax) and alternatives for the management of the resource
title_sort variations in the age composition of catch of anchovy (engraulis mordax) and alternatives for the management of the resource
description The structure of the northern anchovy population before the disturbance caused by “El Niño” in 1982-1983 is analyzed. 20,205 age data originated from biological sampling of the commercial catches in Baja California throughout the 1978-1982 period were processed, and the results are presented here. The year classes responsible for the catch in 1979-1981 are identified. It is established that the one year old group has been the main catch generator. The age composition variability is described and a situation of capture of young individuals is observed. It is suggested to limit the capture of individuals younger than one year with the purpose of allowing a higher biomass incorporation by the growth process. The year class and recruitment concepts as well as their relation to vulnerability and social behavior processes are discussed.
publisher Iniversidad Autónoma de Baja California
publishDate 2021
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/818
_version_ 1715724015309422592

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