Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico

A method to model the annual abundance variation of the Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico is proposed. Principal components analysis (PCA) was used to obtain two population indices: the abundance of recruits, or FR index, and the abundance of...

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Autor principal:	Cervantes-Hernández,Pedro
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2008
Materias:	Brown shrimp recruits spawners annual variation Mexican Pacific
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100011
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spelling	oai:scielo:S0718-195720080001000112008-07-21Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, MexicoCervantes-Hernández,Pedro Brown shrimp recruits spawners annual variation Mexican Pacific A method to model the annual abundance variation of the Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico is proposed. Principal components analysis (PCA) was used to obtain two population indices: the abundance of recruits, or FR index, and the abundance of spawners, or DR index. The age group of four months was used to calculate the FR index and the age groups from six to 11 months were used to calculate the DR index. The analysis of the fishery mortality rate (F) indicated that shrimp between 12 (F = 0.88 monthly) and 16 months (F = 1.66 monthly) were overfished, and that 3 months old shrimp were observed partially recruited to the fishery (F = 0.02 monthly); for this reason, PCA did not show a significant factor loading in any of the indices. The age groups selected by PCA in each calculated population index were observed underfished in the natural population so that these age groups were considered very important to maintain the continuity of the fishery between 1989 and 1998. Based on the annual abundance variation of FR and DR obtained by the virtual population analysis (VPA), from July to August/September, the abundance of recruits was higher than the spawners, while from October to January, the abundance of spawners was higher than the recruitsinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.43 n.1 20082008-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100011en10.4067/S0718-19572008000100011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Brown shrimp recruits spawners annual variation Mexican Pacific
spellingShingle	Brown shrimp recruits spawners annual variation Mexican Pacific Cervantes-Hernández,Pedro Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
description	A method to model the annual abundance variation of the Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico is proposed. Principal components analysis (PCA) was used to obtain two population indices: the abundance of recruits, or FR index, and the abundance of spawners, or DR index. The age group of four months was used to calculate the FR index and the age groups from six to 11 months were used to calculate the DR index. The analysis of the fishery mortality rate (F) indicated that shrimp between 12 (F = 0.88 monthly) and 16 months (F = 1.66 monthly) were overfished, and that 3 months old shrimp were observed partially recruited to the fishery (F = 0.02 monthly); for this reason, PCA did not show a significant factor loading in any of the indices. The age groups selected by PCA in each calculated population index were observed underfished in the natural population so that these age groups were considered very important to maintain the continuity of the fishery between 1989 and 1998. Based on the annual abundance variation of FR and DR obtained by the virtual population analysis (VPA), from July to August/September, the abundance of recruits was higher than the spawners, while from October to January, the abundance of spawners was higher than the recruits
author	Cervantes-Hernández,Pedro
author_facet	Cervantes-Hernández,Pedro
author_sort	Cervantes-Hernández,Pedro
title	Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
title_short	Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
title_full	Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
title_fullStr	Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
title_full_unstemmed	Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico
title_sort	method to obtain abundance indices in the population of farfantepenaeus californiensis (holmes, 1900) from the gulf of tehuantepec, oaxaca, mexico
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100011
work_keys_str_mv	AT cervanteshernandezpedro methodtoobtainabundanceindicesinthepopulationoffarfantepenaeuscaliforniensisholmes1900fromthegulfoftehuantepecoaxacamexico
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Method to obtain abundance indices in the population of Farfantepenaeus californiensis (Holmes, 1900) from the Gulf of Tehuantepec, Oaxaca, Mexico

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