Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California

ABSTRACT Larval fish composition and abundance were analyzed during February-March (winter) and November-December (autumn) of 2005 to investigate which environmental conditions and mesoscale oceanographic processes affect the distribution of larval fish assemblages in the Gulf of California, and if...

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Autores principales:	Urias-Leyva,Homero, Aceves-Medina,Gerardo, Avendaño-Ibarra,Raymundo, Saldierna-Martínez,Ricardo J., Gómez-Gutiérrez,Jaime, Robinson,Carlos J.
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2018
Materias:	fish larvae assemblage upwelling eddies Gulf of California
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100020
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spelling	oai:scielo:S0718-560X20180001000202018-04-17Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of CaliforniaUrias-Leyva,HomeroAceves-Medina,GerardoAvendaño-Ibarra,RaymundoSaldierna-Martínez,Ricardo J.Gómez-Gutiérrez,JaimeRobinson,Carlos J. fish larvae assemblage upwelling eddies Gulf of California ABSTRACT Larval fish composition and abundance were analyzed during February-March (winter) and November-December (autumn) of 2005 to investigate which environmental conditions and mesoscale oceanographic processes affect the distribution of larval fish assemblages in the Gulf of California, and if these variables and processes are useful to delimit specific regions of ichthyofaunal distribution. The overall pattern was mostly a latitudinal gradient of the abundance of two faunistic complexes of larval fish assemblages (temperate northern and tropical southern complexes) strongly associated with the spatial distribution of sea surface temperature. The integration of these results, with previous investigations in the region, lets us confirm that the northern and southern larval fish assemblages extend and contract their distribution ranges according to the latitudinal displacement of the 21°C sea surface isotherm. We identified this to be a valuable criterion to establish the southern distribution limit of the temperate larval fish assemblage, and the 18°C as the northern limit of the tropical larval fish assemblage. However, this general pattern is maintained only in absence of mesoscale oceanographic features (upwelling and eddies) that increase larval drift from the coast to the central region of the Gulf, particularly during the November-December period when longitudinal gradients were stronger than in February-March.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.46 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100020en10.3856/vol46-issue1-fulltext-4
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	fish larvae assemblage upwelling eddies Gulf of California
spellingShingle	fish larvae assemblage upwelling eddies Gulf of California Urias-Leyva,Homero Aceves-Medina,Gerardo Avendaño-Ibarra,Raymundo Saldierna-Martínez,Ricardo J. Gómez-Gutiérrez,Jaime Robinson,Carlos J. Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
description	ABSTRACT Larval fish composition and abundance were analyzed during February-March (winter) and November-December (autumn) of 2005 to investigate which environmental conditions and mesoscale oceanographic processes affect the distribution of larval fish assemblages in the Gulf of California, and if these variables and processes are useful to delimit specific regions of ichthyofaunal distribution. The overall pattern was mostly a latitudinal gradient of the abundance of two faunistic complexes of larval fish assemblages (temperate northern and tropical southern complexes) strongly associated with the spatial distribution of sea surface temperature. The integration of these results, with previous investigations in the region, lets us confirm that the northern and southern larval fish assemblages extend and contract their distribution ranges according to the latitudinal displacement of the 21°C sea surface isotherm. We identified this to be a valuable criterion to establish the southern distribution limit of the temperate larval fish assemblage, and the 18°C as the northern limit of the tropical larval fish assemblage. However, this general pattern is maintained only in absence of mesoscale oceanographic features (upwelling and eddies) that increase larval drift from the coast to the central region of the Gulf, particularly during the November-December period when longitudinal gradients were stronger than in February-March.
author	Urias-Leyva,Homero Aceves-Medina,Gerardo Avendaño-Ibarra,Raymundo Saldierna-Martínez,Ricardo J. Gómez-Gutiérrez,Jaime Robinson,Carlos J.
author_facet	Urias-Leyva,Homero Aceves-Medina,Gerardo Avendaño-Ibarra,Raymundo Saldierna-Martínez,Ricardo J. Gómez-Gutiérrez,Jaime Robinson,Carlos J.
author_sort	Urias-Leyva,Homero
title	Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
title_short	Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
title_full	Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
title_fullStr	Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
title_full_unstemmed	Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California
title_sort	regionalization in the distribution of larval fish assemblages during winter and autumn in the gulf of california
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000100020
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_version_	1714205193776660480

Regionalization in the distribution of larval fish assemblages during winter and autumn in the Gulf of California

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