Preliminary study of the scars borne by Gammaridae (Amphipoda, Crustacea)

摘要: Many gammarid shrimps from the rivers Meuse and Viroin bear scars. A recent invader in Meuse, Dikerogammarus villosus, is claimed to exhibit a strong predatory behaviour against other Gammaridae. Therefore we tested hypothesis that scarred Gammaridae should be more numerous where D. villosus dominant than tributary, Viroin, it absent. On contrary there were significantly individuals (51%) (32%). The most exposed appendages frequently injured, multiple scars on single individual not distributed randomly. These results are discussed.