Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event

The impact of the El Niño event (1997-1998) on the spatial dynamics as well as on the changes in the aggregation patterns of anchoveta eggs and larvae due to the alteration in the thermal anomalies were analyzed. Six bio-oceanographic surveys were carried out in northern Chile from Arica (18°29'...

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Autores principales:	Rojas,Pablo M, Landaeta,Mauricio F, Ulloa,Raúl
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2011
Materias:	Chile-Humboldt Current System fish larvae thermal anomaly coastal upwelling zooplankton
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000300010
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spelling	oai:scielo:S0718-195720110003000102012-05-10Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño eventRojas,Pablo MLandaeta,Mauricio FUlloa,Raúl Chile-Humboldt Current System fish larvae thermal anomaly coastal upwelling zooplankton The impact of the El Niño event (1997-1998) on the spatial dynamics as well as on the changes in the aggregation patterns of anchoveta eggs and larvae due to the alteration in the thermal anomalies were analyzed. Six bio-oceanographic surveys were carried out in northern Chile from Arica (18°29'S, 70°19'W) to Antofagasta (23°38'S, 70°24'W) over different periods (before and during) of the 1997-1998 El Niño event. Changes in the vertical distribution and aggregation patterns of anchoveta in early life stages were registered as well as an increase in zooplankton biomass with the arrival of El Niño; moreover, the spatial distribution of anchoveta was altered due to the gradually poleward displacement of spawning areas as a result of the arrival of subtropical warm waters from the north. The increase in zooplankton biomass linked to a change in the species composition suggests a negative impact on the anchoveta larval feeding. Our results suggest that abrupt changes in the environment would have immediate consequences on the spatial distribution of anchoveta in early life stages, causing a potential impact on the recruitment of this small pelagic fish in the Humboldt Current System off northern Chile.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.46 n.3 20112011-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000300010en10.4067/S0718-19572011000300010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chile-Humboldt Current System fish larvae thermal anomaly coastal upwelling zooplankton
spellingShingle	Chile-Humboldt Current System fish larvae thermal anomaly coastal upwelling zooplankton Rojas,Pablo M Landaeta,Mauricio F Ulloa,Raúl Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
description	The impact of the El Niño event (1997-1998) on the spatial dynamics as well as on the changes in the aggregation patterns of anchoveta eggs and larvae due to the alteration in the thermal anomalies were analyzed. Six bio-oceanographic surveys were carried out in northern Chile from Arica (18°29'S, 70°19'W) to Antofagasta (23°38'S, 70°24'W) over different periods (before and during) of the 1997-1998 El Niño event. Changes in the vertical distribution and aggregation patterns of anchoveta in early life stages were registered as well as an increase in zooplankton biomass with the arrival of El Niño; moreover, the spatial distribution of anchoveta was altered due to the gradually poleward displacement of spawning areas as a result of the arrival of subtropical warm waters from the north. The increase in zooplankton biomass linked to a change in the species composition suggests a negative impact on the anchoveta larval feeding. Our results suggest that abrupt changes in the environment would have immediate consequences on the spatial distribution of anchoveta in early life stages, causing a potential impact on the recruitment of this small pelagic fish in the Humboldt Current System off northern Chile.
author	Rojas,Pablo M Landaeta,Mauricio F Ulloa,Raúl
author_facet	Rojas,Pablo M Landaeta,Mauricio F Ulloa,Raúl
author_sort	Rojas,Pablo M
title	Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
title_short	Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
title_full	Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
title_fullStr	Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
title_full_unstemmed	Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event
title_sort	eggs and larvae of anchoveta engraulis ringens off northern chile during the 1997-1998 el niño event
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000300010
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Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event

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