Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina

The "langostilla", Munida gregaria, also called lobster krill or squat lobster, is a very common galatheid crustacean in San Jorge Gulf and around the southern tip of South America. Previous studies have shown that this species plays an important role in the trophic webs wherever it has be...

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Autores principales:	Vinuesa,Julio H, Varisco,Martin
Lenguaje:	English
Publicado:	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso 2007
Materias:	feeding, predators lobster krill Munida gregaria San Jorge Gulf
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200003
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spelling	oai:scielo:S0717-717820070002000032008-01-31Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, ArgentinaVinuesa,Julio HVarisco,Martin feeding, predators lobster krill Munida gregaria San Jorge Gulf The "langostilla", Munida gregaria, also called lobster krill or squat lobster, is a very common galatheid crustacean in San Jorge Gulf and around the southern tip of South America. Previous studies have shown that this species plays an important role in the trophic webs wherever it has been studied. In order to determine its natural food sources, we analyzed 10 samples (30-36 individuals each) taken from different sites in San Jorge Gulf. Moreover, stomach analyses were performed on 32 fish species, 4 mollusk species, and 7 crustacean species from the gulf. The lobster krill is primarily a detritivore or surface deposit-feeder and secondarily a predator and/or scavenger. Its main energy sources are particu-late organic matter and their associated bacteria, small live organisms on the surface of the sediment layer (ostracods, copepods, foraminifers, other protists), and animal debris. Polychaetes are the main prey of lobster krill in the study area. This dual complementary feeding behavior is common in the studied galatheids, making them a fundamental link between detritus and benthic and demersal top predators. Some species of these predators constitute important fisheries. Different life-cycle stages of the squat lobster were preyed on by 32 of the examined species. However, the spectrum of predators is still incomplete, with other species feeding on larvae and juveniles of the speciesinfo:eu-repo/semantics/openAccessEscuela de Ciencias del Mar. Pontificia Universidad Católica de ValparaísoInvestigaciones marinas v.35 n.2 20072007-11-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200003en10.4067/S0717-71782007000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	feeding, predators lobster krill Munida gregaria San Jorge Gulf
spellingShingle	feeding, predators lobster krill Munida gregaria San Jorge Gulf Vinuesa,Julio H Varisco,Martin Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
description	The "langostilla", Munida gregaria, also called lobster krill or squat lobster, is a very common galatheid crustacean in San Jorge Gulf and around the southern tip of South America. Previous studies have shown that this species plays an important role in the trophic webs wherever it has been studied. In order to determine its natural food sources, we analyzed 10 samples (30-36 individuals each) taken from different sites in San Jorge Gulf. Moreover, stomach analyses were performed on 32 fish species, 4 mollusk species, and 7 crustacean species from the gulf. The lobster krill is primarily a detritivore or surface deposit-feeder and secondarily a predator and/or scavenger. Its main energy sources are particu-late organic matter and their associated bacteria, small live organisms on the surface of the sediment layer (ostracods, copepods, foraminifers, other protists), and animal debris. Polychaetes are the main prey of lobster krill in the study area. This dual complementary feeding behavior is common in the studied galatheids, making them a fundamental link between detritus and benthic and demersal top predators. Some species of these predators constitute important fisheries. Different life-cycle stages of the squat lobster were preyed on by 32 of the examined species. However, the spectrum of predators is still incomplete, with other species feeding on larvae and juveniles of the species
author	Vinuesa,Julio H Varisco,Martin
author_facet	Vinuesa,Julio H Varisco,Martin
author_sort	Vinuesa,Julio H
title	Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
title_short	Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
title_full	Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
title_fullStr	Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
title_full_unstemmed	Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina
title_sort	trophic ecology of the lobster krill munida gregaria in san jorge gulf, argentina
publisher	Escuela de Ciencias del Mar. Pontificia Universidad Católica de Valparaíso
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-71782007000200003
work_keys_str_mv	AT vinuesajulioh trophicecologyofthelobsterkrillmunidagregariainsanjorgegulfargentina AT variscomartin trophicecologyofthelobsterkrillmunidagregariainsanjorgegulfargentina
_version_	1718442956526977024

Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina

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