Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)

We investigated the spatial distribution of the abundance, biomass and size of zooplankton (nauplii, calanoids, cyclopoids and appendicularians) in relation to the distribution of first-feeding larvae and eggs of Engraulis anchoita across the frontal system of Peninsula Valdés. Twelve samples of zoo...

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Autores principales: Spinelli, M.L., Pájaro, M., Martos, P., Esnal, G.B., Sabatini, M., Capitanio, F.L.
Formato: JOUR
Materias:
Appendicularians
Copepods
North Patagonian frontal system
Southwestern Atlantic Ocean
Zooplankton-anchovy linkage
biomass
chlorophyll a
egg
food availability
ichthyoplankton
larva
prey availability
relative abundance
spatial distribution
spawning
survival
trophic level
zooplankton
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Appendicularia (class)
Calanoida
Copepoda
Cyclopoida
Engraulidae
Engraulis anchoita
Tragelaphus eurycerus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02148358_v76_n1_p39_Spinelli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02148358_v76_n1_p39_Spinelli
record_format dspace
spelling todo:paper_02148358_v76_n1_p39_Spinelli2023-10-03T15:10:18Z Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean) Spinelli, M.L. Pájaro, M. Martos, P. Esnal, G.B. Sabatini, M. Capitanio, F.L. Appendicularians Copepods North Patagonian frontal system Southwestern Atlantic Ocean Zooplankton-anchovy linkage biomass chlorophyll a egg food availability ichthyoplankton larva prey availability relative abundance spatial distribution spawning survival trophic level zooplankton Atlantic Ocean Atlantic Ocean (Southwest) Patagonia Appendicularia (class) Calanoida Copepoda Cyclopoida Engraulidae Engraulis anchoita Tragelaphus eurycerus We investigated the spatial distribution of the abundance, biomass and size of zooplankton (nauplii, calanoids, cyclopoids and appendicularians) in relation to the distribution of first-feeding larvae and eggs of Engraulis anchoita across the frontal system of Peninsula Valdés. Twelve samples of zooplankton and ichthyoplankton were taken with small Bongo (67 μm) and Pairovet (200 μm) nets during the spring of 2004 along two transects. The total abundance of zooplankton and the chlorophyll a concentration were higher in homogeneous waters, while total biomasses were higher in stratified waters. Temperature was negatively correlated with biological variables and was the main factor affecting the zooplankton distribution. In both transects, abundance peaks of first-feeding larvae were detected at coastal stations along with the smallest fraction of zooplankton (<500 μm), while the largest fraction was dominant at the external stations, coinciding with the highest egg abundance. The physical structure of this front generates different levels of food availability for first-feeding larvae. Calanoids (southern transect) and cyclopoids (northern transect) are predominant followed by nauplii and appendicularians. The biomass of zooplankton preys contributes to the carbon transfer to the upper trophic levels and is probably important for the survival and growth of anchovy larvae in this frontal system. Fil:Martos, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02148358_v76_n1_p39_Spinelli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Appendicularians
Copepods
North Patagonian frontal system
Southwestern Atlantic Ocean
Zooplankton-anchovy linkage
biomass
chlorophyll a
egg
food availability
ichthyoplankton
larva
prey availability
relative abundance
spatial distribution
spawning
survival
trophic level
zooplankton
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Appendicularia (class)
Calanoida
Copepoda
Cyclopoida
Engraulidae
Engraulis anchoita
Tragelaphus eurycerus
spellingShingle Appendicularians
Copepods
North Patagonian frontal system
Southwestern Atlantic Ocean
Zooplankton-anchovy linkage
biomass
chlorophyll a
egg
food availability
ichthyoplankton
larva
prey availability
relative abundance
spatial distribution
spawning
survival
trophic level
zooplankton
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Appendicularia (class)
Calanoida
Copepoda
Cyclopoida
Engraulidae
Engraulis anchoita
Tragelaphus eurycerus
Spinelli, M.L.
Pájaro, M.
Martos, P.
Esnal, G.B.
Sabatini, M.
Capitanio, F.L.
Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
topic_facet Appendicularians
Copepods
North Patagonian frontal system
Southwestern Atlantic Ocean
Zooplankton-anchovy linkage
biomass
chlorophyll a
egg
food availability
ichthyoplankton
larva
prey availability
relative abundance
spatial distribution
spawning
survival
trophic level
zooplankton
Atlantic Ocean
Atlantic Ocean (Southwest)
Patagonia
Appendicularia (class)
Calanoida
Copepoda
Cyclopoida
Engraulidae
Engraulis anchoita
Tragelaphus eurycerus
description We investigated the spatial distribution of the abundance, biomass and size of zooplankton (nauplii, calanoids, cyclopoids and appendicularians) in relation to the distribution of first-feeding larvae and eggs of Engraulis anchoita across the frontal system of Peninsula Valdés. Twelve samples of zooplankton and ichthyoplankton were taken with small Bongo (67 μm) and Pairovet (200 μm) nets during the spring of 2004 along two transects. The total abundance of zooplankton and the chlorophyll a concentration were higher in homogeneous waters, while total biomasses were higher in stratified waters. Temperature was negatively correlated with biological variables and was the main factor affecting the zooplankton distribution. In both transects, abundance peaks of first-feeding larvae were detected at coastal stations along with the smallest fraction of zooplankton (<500 μm), while the largest fraction was dominant at the external stations, coinciding with the highest egg abundance. The physical structure of this front generates different levels of food availability for first-feeding larvae. Calanoids (southern transect) and cyclopoids (northern transect) are predominant followed by nauplii and appendicularians. The biomass of zooplankton preys contributes to the carbon transfer to the upper trophic levels and is probably important for the survival and growth of anchovy larvae in this frontal system.
format JOUR
author Spinelli, M.L.
Pájaro, M.
Martos, P.
Esnal, G.B.
Sabatini, M.
Capitanio, F.L.
author_facet Spinelli, M.L.
Pájaro, M.
Martos, P.
Esnal, G.B.
Sabatini, M.
Capitanio, F.L.
author_sort Spinelli, M.L.
title Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
title_short Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
title_full Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
title_fullStr Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
title_full_unstemmed Potential zooplankton preys (Copepoda and Appendicularia) for Engraulis anchoita in relation to early larval and spawning distributions in the Patagonian frontal system (SW Atlantic Ocean)
title_sort potential zooplankton preys (copepoda and appendicularia) for engraulis anchoita in relation to early larval and spawning distributions in the patagonian frontal system (sw atlantic ocean)
url http://hdl.handle.net/20.500.12110/paper_02148358_v76_n1_p39_Spinelli
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