MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)

The rich biological productivity within the Peru-Chile current system depends mainly on wind-driven coastal upwelling, which brings colder, nutrient-rich, subsurface waters into the illuminated upper layer, promoting high phytoplankton productivity whish is available for zooplankton and ultimately f...

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Autores principales:	Hormazabal,S, Núñez,S, Arcos,D, Espindola,F, Yuras,G
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200053
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spelling	oai:scielo:S0717-653820040002000532005-05-16MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)Hormazabal,SNúñez,SArcos,DEspindola,FYuras,GThe rich biological productivity within the Peru-Chile current system depends mainly on wind-driven coastal upwelling, which brings colder, nutrient-rich, subsurface waters into the illuminated upper layer, promoting high phytoplankton productivity whish is available for zooplankton and ultimately for fish. Off central Chile (29-39°S), where strong mesoscale eddies and meanders characterize the Coastal Transition Zone (CTZ), we are using hydrographic data, hydroacustic fish-biomass data and satellite information of wind stress, sea level anomalies and chlorophyll, to investigate linkages between mesoscale eddies and meanders and pelagic fish spatial variability. Satellite and in situ data showed that mesoscale structures have a strong association with primary production enhancement in the CTZ. In this region, mesoscale eddies have a coherent vertical structure above 600 m depth, and generate an offshore transport of 2x10(6) m³ s-1 which would be exerting an important influence on upper trophic levels in oceanic waters. A good relationship between mesoscale eddies and temporal-spatial fish distribution has been observed. The different responses of biological-physical interactions associated with mesoscale structure are also discussed. Grant from FIP, FONDECYT N°1040618 and Fisheries Research Instituteinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200053en10.4067/S0717-65382004000200053
institution	Scielo Chile
collection	Scielo Chile
language	English
description	The rich biological productivity within the Peru-Chile current system depends mainly on wind-driven coastal upwelling, which brings colder, nutrient-rich, subsurface waters into the illuminated upper layer, promoting high phytoplankton productivity whish is available for zooplankton and ultimately for fish. Off central Chile (29-39°S), where strong mesoscale eddies and meanders characterize the Coastal Transition Zone (CTZ), we are using hydrographic data, hydroacustic fish-biomass data and satellite information of wind stress, sea level anomalies and chlorophyll, to investigate linkages between mesoscale eddies and meanders and pelagic fish spatial variability. Satellite and in situ data showed that mesoscale structures have a strong association with primary production enhancement in the CTZ. In this region, mesoscale eddies have a coherent vertical structure above 600 m depth, and generate an offshore transport of 2x10(6) m³ s-1 which would be exerting an important influence on upper trophic levels in oceanic waters. A good relationship between mesoscale eddies and temporal-spatial fish distribution has been observed. The different responses of biological-physical interactions associated with mesoscale structure are also discussed. Grant from FIP, FONDECYT N°1040618 and Fisheries Research Institute
author	Hormazabal,S Núñez,S Arcos,D Espindola,F Yuras,G
spellingShingle	Hormazabal,S Núñez,S Arcos,D Espindola,F Yuras,G MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
author_facet	Hormazabal,S Núñez,S Arcos,D Espindola,F Yuras,G
author_sort	Hormazabal,S
title	MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
title_short	MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
title_full	MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
title_fullStr	MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
title_full_unstemmed	MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)
title_sort	mesoscale eddies and pelagic fishery off central chile (33-40°s)
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200053
work_keys_str_mv	AT hormazabals mesoscaleeddiesandpelagicfisheryoffcentralchile3340s AT nunezs mesoscaleeddiesandpelagicfisheryoffcentralchile3340s AT arcosd mesoscaleeddiesandpelagicfisheryoffcentralchile3340s AT espindolaf mesoscaleeddiesandpelagicfisheryoffcentralchile3340s AT yurasg mesoscaleeddiesandpelagicfisheryoffcentralchile3340s
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MESOSCALE EDDIES AND PELAGIC FISHERY OFF CENTRAL CHILE (33-40°S)

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