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| Format: | Artículo científico |
| Language: | en |
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Pontificia Universidad Católica de Valparaíso
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=45635203 |
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Table of Contents:
- Trophic ecology of the lobster krill Munida gregaria in San Jorge Gulf, Argentina Martín Varisco Julio H. Vinuesa Ciencias de la Tierra feeding predators Patagonia lobster krill San Jorge Gulf The langostilla, Munida gregaria, also called lobster krill or squat lobster, is a very common galatheidcrustacean in San Jorge Gulf and around the southern tip of South America. Previous studies have shown that this speciesplays an important role in the trophic webs wherever it has been studied. In order to determine its natural food sources, weanalyzed 10 samples (30-36 individuals each) taken from different sites in San Jorge Gulf. Moreover, stomach analyseswere performed on 32 fish species, 4 mollusk species, and 7 crustacean species from the gulf. The lobster krill is primarilya detritivore or surface deposit-feeder and secondarily a predator and/or scavenger. Its main energy sources are particulateorganic 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 studyarea. This dual complementary feeding behavior is common in the studied galatheids, making them a fundamental linkbetween 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 ofpredators is still incomplete, with other species feeding on larvae and juveniles of the species. 2007 artículo científico 0716-1069 https://www.redalyc.org/articulo.oa?id=45635203 en http://www.redalyc.org/revista.oa?id=456 Investigaciones Marinas application/pdf Pontificia Universidad Católica de Valparaíso Investigaciones Marinas (Chile) Num.2 Vol.35