Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)

The role of daily vertical migration (DVM) of ichthyoplanktonic associations off Punta Angamos, in northern Chile, was examined. In September 1998 and January 1999, two oceanographic surveys were conducted during coastal upwelling events. Fish larvae were collected during the day/night in three dept...

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Autor principal:	Rojas,Pablo M
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	fish larvae assemblages vertical migratory behaviour upwelling filament northern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300002
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spelling	oai:scielo:S0718-560X20140003000022014-10-10Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)Rojas,Pablo M fish larvae assemblages vertical migratory behaviour upwelling filament northern Chile The role of daily vertical migration (DVM) of ichthyoplanktonic associations off Punta Angamos, in northern Chile, was examined. In September 1998 and January 1999, two oceanographic surveys were conducted during coastal upwelling events. Fish larvae were collected during the day/night in three depth strata (0-20, 20-80 and 80-200 m) and inside/outside of upwelling filaments. The study area was dominated by a southward flow along 200 m depth; meanwhile, the Ekman layer did not exceed 20 m depth. The greatest accumulation of larvae was found in the middle layer (20-80 m), where the current velocity was low and did not interact with the circulation associated with upwelling the filament formation. Most fish larvae were found in non-upwelling waters in the middle stratum. Independent of the origin of water (upwelling/non-upwelling), larvae of Dioge-nichthys laternatus (Myctophidae), Engraulis ringens (Engraulidae) and Bathylagus nigrigenys (Bathylagidae) showed a deeper vertical distribution during the day, suggesting a daily vertical migration. This behavior can potentially increase retention of larvae near the coast in productive areas through vertical evasion of the Ekman layer during upwelling events.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.3 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300002en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	fish larvae assemblages vertical migratory behaviour upwelling filament northern Chile
spellingShingle	fish larvae assemblages vertical migratory behaviour upwelling filament northern Chile Rojas,Pablo M Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
description	The role of daily vertical migration (DVM) of ichthyoplanktonic associations off Punta Angamos, in northern Chile, was examined. In September 1998 and January 1999, two oceanographic surveys were conducted during coastal upwelling events. Fish larvae were collected during the day/night in three depth strata (0-20, 20-80 and 80-200 m) and inside/outside of upwelling filaments. The study area was dominated by a southward flow along 200 m depth; meanwhile, the Ekman layer did not exceed 20 m depth. The greatest accumulation of larvae was found in the middle layer (20-80 m), where the current velocity was low and did not interact with the circulation associated with upwelling the filament formation. Most fish larvae were found in non-upwelling waters in the middle stratum. Independent of the origin of water (upwelling/non-upwelling), larvae of Dioge-nichthys laternatus (Myctophidae), Engraulis ringens (Engraulidae) and Bathylagus nigrigenys (Bathylagidae) showed a deeper vertical distribution during the day, suggesting a daily vertical migration. This behavior can potentially increase retention of larvae near the coast in productive areas through vertical evasion of the Ekman layer during upwelling events.
author	Rojas,Pablo M
author_facet	Rojas,Pablo M
author_sort	Rojas,Pablo M
title	Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
title_short	Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
title_full	Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
title_fullStr	Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
title_full_unstemmed	Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)
title_sort	diel variation in the vertical distribution of fish larvae forced by upwelling filaments off punta angamos (northern chile)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300002
work_keys_str_mv	AT rojaspablom dielvariationintheverticaldistributionoffishlarvaeforcedbyupwellingfilamentsoffpuntaangamosnorthernchile
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Diel variation in the vertical distribution of fish larvae forced by upwelling filaments off Punta Angamos (northern Chile)

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