Infection of Acanthocephalus tumescens (Palaeacanthocephala, Echinorhynchidae) in Galaxias maculatus (Pisces, Galaxiidae) in lake Gutiérrez, Patagonia, Argentina

TREJO, ANA; SEMENAS, LILIANA; VIOZZI, GUSTAVO

JOURNAL OF PARASITOLOGY

American Society of Parasitologysts

Lugar: Lawrence, Kansas; Año: 2000 vol. 86 p. 188 - 191

0022-3395

The seasonal distribution of Acanthocephalus tumescens (Acanthocephala: Echinorhynchidae) among Galaxias maculatus (Pisces: Galaxiidae) in Lake Gutiérrez was studied from March 1994 to June 1996. Acanthocephalus tumescens always occurs in the intestine, has an overdispersed frequency distribution, a similar proportion of sexes, and females are larger than males. Mean intensity and prevalence are low and increase with host lenght. The pattern of the infection shows seasonality, with recruitment in winter and reproductive period during spring-summer.