par Schmit, Olivier;Josens, Guy
Référence Belgian journal of zoology, 134, 2 PART 1, page (75-78)
Publication Publié, 2004-07
Article révisé par les pairs
Résumé : Many gammarid shrimps from the rivers Meuse and Viroin bear scars. A recent invader in the Meuse, Dikerogammarus villosus, is claimed to exhibit a strong predatory behaviour against other Gammaridae. Therefore we tested the hypothesis that scarred Gammaridae should be more numerous in the Meuse where D. villosus is dominant than in a tributary, the Viroin, where it is absent. On the contrary there were significantly more scarred individuals in the Viroin (51%) than in the Meuse (32%). The most exposed appendages were the most frequently injured, and multiple scars on a single individual were not distributed randomly. These results are discussed.