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[Flexible omnivory in Dikerogammarus villosus (Sowinsky, 1894) (Amphipoda) — Amphipod Pilot Species Project (AMPIS) Report 5, Flexible omnivory in Dikerogammarus villosus (Sowinsky, 1894) (Amphipoda) — Amphipod Pilot Species Project (AMPIS) Report 5]

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[Feeding in Dikerogammarus villosus (Sowinsky, 1894) males was observed in the field and recorded on video in the laboratory. The following feeding modes were recognized: detritus feeding, grazing, particle feeding, coprophagy, predation on benthic and free swimming invertebrates, predation on fish eggs and larvae, as well as feeding on byssus threads of the zebra mussel, Dreissena polymorpha (Pallas, 1771). The feeding methods are described and illustrated with screenshots of video recordings. The very flexible feeding modes of D. villosus, which make diet switches possible, form a trait that must be an important factor in the invasion success of this Ponto-Caspian gammaridean species, and may thus explain for a great deal its high ecosystem impact. L'alimentation des mâles de Dikerogammarus villosus (Sowinsky, 1894) a été observée dans la nature et enregistrée par vidéo au laboratoire. Les différents modes d'alimentation suivants ont été reconnus: détritivore, broutage, particulaire, coprophage, prédation sur des invertébrés benthiques et nageurs, prédation d'æufs et de larves de poissons, et aussi alimentation sur les amas de la moule rayée Dreissena polymorpha (Pallas, 1771).

Les méthodes d'alimentation sont décrites et illustrées avec des photos provenant d'enregistrements vidéos. Le mode d'alimentation très flexible de D. villosus, qui permet des changements de régime, est un trait qui est peut-être un facteur important dans le succès d'invasion de cette espèce de gammaridé Ponto-Caspien et qui peut expliquer en grande partie son fort impact sur l'écosystème.
, Feeding in Dikerogammarus villosus (Sowinsky, 1894) males was observed in the field and recorded on video in the laboratory. The following feeding modes were recognized: detritus feeding, grazing, particle feeding, coprophagy, predation on benthic and free swimming invertebrates, predation on fish eggs and larvae, as well as feeding on byssus threads of the zebra mussel, Dreissena polymorpha (Pallas, 1771). The feeding methods are described and illustrated with screenshots of video recordings. The very flexible feeding modes of D. villosus, which make diet switches possible, form a trait that must be an important factor in the invasion success of this Ponto-Caspian gammaridean species, and may thus explain for a great deal its high ecosystem impact. L'alimentation des mâles de Dikerogammarus villosus (Sowinsky, 1894) a été observée dans la nature et enregistrée par vidéo au laboratoire. Les différents modes d'alimentation suivants ont été reconnus: détritivore, broutage, particulaire, coprophage, prédation sur des invertébrés benthiques et nageurs, prédation d'æufs et de larves de poissons, et aussi alimentation sur les amas de la moule rayée Dreissena polymorpha (Pallas, 1771).

Les méthodes d'alimentation sont décrites et illustrées avec des photos provenant d'enregistrements vidéos. Le mode d'alimentation très flexible de D. villosus, qui permet des changements de régime, est un trait qui est peut-être un facteur important dans le succès d'invasion de cette espèce de gammaridé Ponto-Caspien et qui peut expliquer en grande partie son fort impact sur l'écosystème.
]

Affiliations: 1: Zoological Museum, University of Amsterdam, Mauritskade 57, NL-1092 AD Amsterdam, The Netherlands; 2: Department of Animal Ecology and Ecophysiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heijendaalseweg 135, NL-6525 AJ Nijmegen, The Netherlands; National Museum of Natural History Naturalis, P.O. Box 9517, NL-2300 RA Leiden, The Netherlands; 3: School of Biological Sciences, Medical and Biological Centre, Queen's University of Belfast, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, U.K.; 4: Department of Invertebrate Zoology, Institute of Zoology, Chinese Academy of Sciences, Du-Tun Road, Beijing 100101, P.R. China

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/content/journals/10.1163/156854009x423201
2009-06-01
2017-02-26

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