Article (Scientific journals)
Food preferences of larvae of Antarctic silverfish Pleuragramma antarcticum Boulenger, 1902 from Terre Adélie coastal waters during summer 2004
Vallet, Carole; Beans, Cristina; Koubbi, Philippe et al.
2011In Polar Science, 5, p. 239-251
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Keywords :
Pleuragramma antarcticum; food preferences; Terre Adélie; Southern Ocean; phytoplankton; zooplankton; Census of Antarctic Marine Life
Abstract :
[en] Ichthyoplankton samples were collected from 19 to 31 January 2004 in the Dumont d’Urville Sea (East Antarctic shelf). The Nototheniidae Pleuragramma antarcticum comprised more than 90 % of the sampled larvae. Gut contents of 95 P. antarcticum larvae were examined. Most larvae fed on phytoplankton, especially diatoms, whereas some other specimens had a mixed diet with phyto- and zooplankton prey. A single specimen fed exclusively on copepods. The stomach contents was dominated by three diatoms taxa, such as Thalassiothrix antarctica, Fragilariopsis spp. and Chaetoceros spp. Prey selection was apparently food density dependent, with an inverse relationship between food abundance and selection feeding. Larvae selected positively some diatoms, such as Coscinodiscus spp. and T. antarctica, presenting a low concentration in the water column compared to Fragilariopsis spp., which were strongly negatively selected. During summer, larvae were opportunistic feeders with a broad trophic niche, which allowed them to switch between different food types.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Vallet, Carole;  Université du Littoral Côte d'Opale, Wimereux, France
Beans, Cristina
Koubbi, Philippe
Courcot, Lucie
Hecq, Jean-Henri ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Goffart, Anne  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
Food preferences of larvae of Antarctic silverfish Pleuragramma antarcticum Boulenger, 1902 from Terre Adélie coastal waters during summer 2004
Publication date :
January 2011
Journal title :
Polar Science
ISSN :
1873-9652
Publisher :
Elsevier Science Bv and NIPR, Netherlands
Volume :
5
Pages :
239-251
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - Politique scientifique fédérale [BE]
IPEV - Institut Polaire Français Paul Émile Victor [FR]
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since 05 May 2011

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