Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)

The diet and selectivity of larval anchoveta Engraulis ringens was studied during 4 consecutive days (austral spring) in Hornopirén inlet, a fjord-like environment of southern Chile. This environment was characterised by sharp halocline around 10 m depth, separating brackish and saltier waters. The...

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Autores principales:	Landaeta,Mauricio F, Ochoa-Muñoz,María J, Bustos,Claudia A
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2014
Materias:	Diet microplankton southern Chile tides stratification
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000300005
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spelling	oai:scielo:S0718-195720140003000052015-01-14Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)Landaeta,Mauricio FOchoa-Muñoz,María JBustos,Claudia A Diet microplankton southern Chile tides stratification The diet and selectivity of larval anchoveta Engraulis ringens was studied during 4 consecutive days (austral spring) in Hornopirén inlet, a fjord-like environment of southern Chile. This environment was characterised by sharp halocline around 10 m depth, separating brackish and saltier waters. The potential prey field, microzooplankton, was collected at 4 depths (0, 5, 10 and 30 m), while the ichthyoplankton was collected at 2 strata, surface (0-10 m depth) and deep (10-45 m depth). Nauplii and copepodites were the major components of microzooplankton. The analysis of 487 gut contents of larval anchoveta indicates that similar volume of prey was ingested in both layers and during both tides. However, in the upper, brackish and warmer water, larval E. ringens ingested significantly less prey but of larger size, selecting nauplii and copepodites as the main prey items. In the deep, saltier and colder water, larvae ingested more prey of smaller size, showing only selectivity for nauplii. The feeding incidence of E. ringens increased twice during the flood, when the abundance of copepodites in the field also increased. Therefore, complex biophysical interactions occur in Patagonian fjords during the feeding process of larval stages of this commercially important species in tight relationship with the spatio-temporal distribution of prey.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.49 n.3 20142014-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000300005en10.4067/S0718-19572014000300005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Diet microplankton southern Chile tides stratification
spellingShingle	Diet microplankton southern Chile tides stratification Landaeta,Mauricio F Ochoa-Muñoz,María J Bustos,Claudia A Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
description	The diet and selectivity of larval anchoveta Engraulis ringens was studied during 4 consecutive days (austral spring) in Hornopirén inlet, a fjord-like environment of southern Chile. This environment was characterised by sharp halocline around 10 m depth, separating brackish and saltier waters. The potential prey field, microzooplankton, was collected at 4 depths (0, 5, 10 and 30 m), while the ichthyoplankton was collected at 2 strata, surface (0-10 m depth) and deep (10-45 m depth). Nauplii and copepodites were the major components of microzooplankton. The analysis of 487 gut contents of larval anchoveta indicates that similar volume of prey was ingested in both layers and during both tides. However, in the upper, brackish and warmer water, larval E. ringens ingested significantly less prey but of larger size, selecting nauplii and copepodites as the main prey items. In the deep, saltier and colder water, larvae ingested more prey of smaller size, showing only selectivity for nauplii. The feeding incidence of E. ringens increased twice during the flood, when the abundance of copepodites in the field also increased. Therefore, complex biophysical interactions occur in Patagonian fjords during the feeding process of larval stages of this commercially important species in tight relationship with the spatio-temporal distribution of prey.
author	Landaeta,Mauricio F Ochoa-Muñoz,María J Bustos,Claudia A
author_facet	Landaeta,Mauricio F Ochoa-Muñoz,María J Bustos,Claudia A
author_sort	Landaeta,Mauricio F
title	Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
title_short	Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
title_full	Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
title_fullStr	Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
title_full_unstemmed	Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)
title_sort	feeding success and selectivity of larval anchoveta engraulis ringens in a fjord-type inlet from northern patagonia (southeast pacific)
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572014000300005
work_keys_str_mv	AT landaetamauriciof feedingsuccessandselectivityoflarvalanchovetaengraulisringensinafjordtypeinletfromnorthernpatagoniasoutheastpacific AT ochoamunozmariaj feedingsuccessandselectivityoflarvalanchovetaengraulisringensinafjordtypeinletfromnorthernpatagoniasoutheastpacific AT bustosclaudiaa feedingsuccessandselectivityoflarvalanchovetaengraulisringensinafjordtypeinletfromnorthernpatagoniasoutheastpacific
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Feeding success and selectivity of larval anchoveta Engraulis ringens in a fjord-type inlet from northern Patagonia (Southeast Pacific)

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