La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	High Prevalence and Potential Impacts of Caligid Ectoparasites on Larval Atlantic Croaker (Micropogonias undulatus) in the Chesapeake Bay
Auteurs :	Filipe Ribeiro, Auteur ; Eric J. Hilton, Auteur ; Ryan B. Carnegie, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (39(2) MAR 2016)
Article en page(s) :	583-588
Résumé :	Larvae of Atlantic croaker Micropogonias undulatus enter Mid-Atlantic Bight estuaries annually between September and February. A high prevalence of ectoparasitic crustacean infection of ingressing larval M. undulatus was observed in Chesapeake Bay; this ectoparasite was identified as a species of Lepeophtheirus within the copepod family Caligidae from analysis of cytochrome oxidase I sequences and scanning electron microscopy. Between 2007 and 2011, seasonal differences in prevalence were observed, with higher infection rates on fall ingressing larvae (20 % mean monthly infection rate) than in larvae entering the estuary in the winter (monthly infection rate of 6 %); the head region had the highest parasite attachment rate, being observed in 78 % of the infected fish. The potential effects of this ectoparasite on larval M. undulatus could include reductions in feeding (and thus growth) and increased susceptibility to predation.

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