Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)

The feeding of Engraulis anchoita was studied in the coastal reproductive habitat of the northern population during the spawning period. Stomach contents of anchovy adults and plankton samples taken during a research cruise were examined. The highest stomach fullness values were found in the Rio de...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Padovani,Luciano N, Viñas,María D, Pájaro,Marcelo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2011
Materias:	Engraulis anchoita feeding stomach content estuarine front copepods southwestern Atlantic Argentina
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200002
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-560X2011000200002
record_format	dspace
spelling	oai:scielo:S0718-560X20110002000022011-07-26Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)Padovani,Luciano NViñas,María DPájaro,Marcelo Engraulis anchoita feeding stomach content estuarine front copepods southwestern Atlantic Argentina The feeding of Engraulis anchoita was studied in the coastal reproductive habitat of the northern population during the spawning period. Stomach contents of anchovy adults and plankton samples taken during a research cruise were examined. The highest stomach fullness values were found in the Rio de la Plata estuary, particularly at stations close to the surface salinity front. Copepods, particularly those < 1 mm total length, represented by Paracalanus spp. and Oithona spp., were the most abundant prey. The dominance of small copepods in the Argentine anchovy diet is noted for the first time. Ecological implications of this fact are discussed. Other abundant preys were appendicularians, cladocerans, and fish eggs. The species composition of the zooplankton samples coincided roughly with that found in the stomach contents. However, selective feeding was observed on preys > 1 mm total length. This might be explained by a low gill rakers efficiency of adult anchovies to retain small prey. In the Rio de la Plata front, both the reported large biomasses of zooplankton and the observed intense anchovy feeding revealed the ecological significance of this front, especially when compared with the contiguous "poor in food" coastal areas.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.39 n.2 20112011-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200002en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Engraulis anchoita feeding stomach content estuarine front copepods southwestern Atlantic Argentina
spellingShingle	Engraulis anchoita feeding stomach content estuarine front copepods southwestern Atlantic Argentina Padovani,Luciano N Viñas,María D Pájaro,Marcelo Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
description	The feeding of Engraulis anchoita was studied in the coastal reproductive habitat of the northern population during the spawning period. Stomach contents of anchovy adults and plankton samples taken during a research cruise were examined. The highest stomach fullness values were found in the Rio de la Plata estuary, particularly at stations close to the surface salinity front. Copepods, particularly those < 1 mm total length, represented by Paracalanus spp. and Oithona spp., were the most abundant prey. The dominance of small copepods in the Argentine anchovy diet is noted for the first time. Ecological implications of this fact are discussed. Other abundant preys were appendicularians, cladocerans, and fish eggs. The species composition of the zooplankton samples coincided roughly with that found in the stomach contents. However, selective feeding was observed on preys > 1 mm total length. This might be explained by a low gill rakers efficiency of adult anchovies to retain small prey. In the Rio de la Plata front, both the reported large biomasses of zooplankton and the observed intense anchovy feeding revealed the ecological significance of this front, especially when compared with the contiguous "poor in food" coastal areas.
author	Padovani,Luciano N Viñas,María D Pájaro,Marcelo
author_facet	Padovani,Luciano N Viñas,María D Pájaro,Marcelo
author_sort	Padovani,Luciano N
title	Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
title_short	Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
title_full	Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
title_fullStr	Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
title_full_unstemmed	Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)
title_sort	importance of the río de la plata estuarine front (southwestern atlantic ocean) in the feeding ecology of argentine anchovy, engraulis anchoita (clupeiformes, clupeidae)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200002
work_keys_str_mv	AT padovanilucianon importanceoftheriodelaplataestuarinefrontsouthwesternatlanticoceaninthefeedingecologyofargentineanchovyengraulisanchoitaclupeiformesclupeidae AT vinasmariad importanceoftheriodelaplataestuarinefrontsouthwesternatlanticoceaninthefeedingecologyofargentineanchovyengraulisanchoitaclupeiformesclupeidae AT pajaromarcelo importanceoftheriodelaplataestuarinefrontsouthwesternatlanticoceaninthefeedingecologyofargentineanchovyengraulisanchoitaclupeiformesclupeidae
_version_	1714205079077126144

Importance of the Río de la Plata estuarine front (southwestern Atlantic Ocean) in the feeding ecology of Argentine anchovy, Engraulis anchoita (Clupeiformes, Clupeidae)

Ejemplares similares