Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden

Gelatinous carnivores are important components of the pelagic system and potentially key organisms in trophic webs, since they prey on several groups of organisms. In the Gullmar fjord many species of gelatinous organisms have been found exerting an important predatory impact on Acartia clausi, a do...

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Autores principales:	Vergara-Soto,Odette, Calliari,Danilo, Tiselius,Peter, Escribano,Rubén, González,M. Lorena, Soto-Mendoza,Samuel
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2010
Materias:	Functional response ingestion rate chaetognath ctenophore copepod
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000100003
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spelling	oai:scielo:S0718-195720100001000032010-09-14Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, SwedenVergara-Soto,OdetteCalliari,DaniloTiselius,PeterEscribano,RubénGonzález,M. LorenaSoto-Mendoza,Samuel Functional response ingestion rate chaetognath ctenophore copepod Gelatinous carnivores are important components of the pelagic system and potentially key organisms in trophic webs, since they prey on several groups of organisms. In the Gullmar fjord many species of gelatinous organisms have been found exerting an important predatory impact on Acartia clausi, a dominant copepod of the mesozooplankton in this ecosystem. This work aims at evaluating the predatory impact of M. leydi and S. setosa on the community of copepods of the Gullmar fjord. These experiments were of functional-response type. In addition, length-weight regressions for predator biomass estimates were obtained. S. setosa showed a functional response Type II. By contrast, M. leidyi showed a linear functional response (Type I) with maximum ingestion (Imax) rates of 7 copepods ind-1 h-1 for individuals of length size between 7 and 15 mm. Sagitta setosa exhibited an Imax of 3.96 (copepods pred-1 h-1) with individuals in the size-range between 6 and 7 mm. The predatory impact of S. setosa and M. leidyi was high, suggesting that these species exert a strong impact on the mesozooplankton community of the Gullmar fjord.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.45 n.1 20102010-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000100003en10.4067/S0718-19572010000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Functional response ingestion rate chaetognath ctenophore copepod
spellingShingle	Functional response ingestion rate chaetognath ctenophore copepod Vergara-Soto,Odette Calliari,Danilo Tiselius,Peter Escribano,Rubén González,M. Lorena Soto-Mendoza,Samuel Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
description	Gelatinous carnivores are important components of the pelagic system and potentially key organisms in trophic webs, since they prey on several groups of organisms. In the Gullmar fjord many species of gelatinous organisms have been found exerting an important predatory impact on Acartia clausi, a dominant copepod of the mesozooplankton in this ecosystem. This work aims at evaluating the predatory impact of M. leydi and S. setosa on the community of copepods of the Gullmar fjord. These experiments were of functional-response type. In addition, length-weight regressions for predator biomass estimates were obtained. S. setosa showed a functional response Type II. By contrast, M. leidyi showed a linear functional response (Type I) with maximum ingestion (Imax) rates of 7 copepods ind-1 h-1 for individuals of length size between 7 and 15 mm. Sagitta setosa exhibited an Imax of 3.96 (copepods pred-1 h-1) with individuals in the size-range between 6 and 7 mm. The predatory impact of S. setosa and M. leidyi was high, suggesting that these species exert a strong impact on the mesozooplankton community of the Gullmar fjord.
author	Vergara-Soto,Odette Calliari,Danilo Tiselius,Peter Escribano,Rubén González,M. Lorena Soto-Mendoza,Samuel
author_facet	Vergara-Soto,Odette Calliari,Danilo Tiselius,Peter Escribano,Rubén González,M. Lorena Soto-Mendoza,Samuel
author_sort	Vergara-Soto,Odette
title	Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
title_short	Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
title_full	Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
title_fullStr	Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
title_full_unstemmed	Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden
title_sort	functional response of sagitta setosa (chaetognatha) and mnemiopsis leidyi (ctenophora) under variable food concentration in the gullmar fjord, sweden
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000100003
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Functional response of Sagitta setosa (Chaetognatha) and Mnemiopsis leidyi (Ctenophora) under variable food concentration in the Gullmar fjord, Sweden

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