caa a22 4500 388112212 CHVBK 20180307125356.0 cr unu---uuuuu 161130e199902 xx s 000 0 eng 10.1017/S0022149X99000153 doi S0022149X99000153 pii (NATIONALLICENCE)cambridge-10.1017/S0022149X99000153 Pomphorhynchus laevis in its intermediate host Echinogammarus stammeri in the River Brenta, Italy [Elektronische Daten] Infection rates of larval Pomphorhynchus laevis Mu¨ller, 1776 (Acanthocephala) were studied in its intermediate host Echinogammarus stammeriS. Karaman, 1931 (Amphipoda). Crustaceans were collected monthly, from July 1990 to July 1997, at two sites on the River Brenta (northern Italy). Of over 50,000 E. stammeri examined, more than 24% were parasitized with P. laevis larvae. The differences in the prevalence of infection between the two stations were significant. The intensity of infection varied from one to 15 acanthocephalans per host. Amphipods with multiple infections constituted 28-32% of each monthly sample. During the 7 years of investigation, the prevalence of infection typically reached its highest and lowest levels in the summer and spring months, respectively. Acanthocephalan larvae showed no preference for host sex. Infected ovigerous females of E. stammeri were found carrying eggs or juveniles in their brood pouches, but had fewer and smaller eggs. Pomphorhynchus laevis larvae co-occurred with Acanthocephalus clavula (Dujardin, 1845) and also with the tapeworm Cyathocephalus truncatus (Pallas, 1781) in the same host. Cambridge University Press Dezfuli B.S. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy Rossetti E. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy Bellettato C.M. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy Maynard B.J. Department of Biology, Colorado State University, Fort Collins, USA Journal of Helminthology Cambridge University Press 73/2(1999-02), 95-102 0022-149X 73:2<95 1999 73 JHL https://doi.org/10.1017/S0022149X99000153 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022149X99000153 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dezfuli B.S. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy NATIONALLICENCE 700 1- Rossetti E. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy NATIONALLICENCE 700 1- Bellettato C.M. Department of Biology, University of Ferrara, Via Borsari, 46, 44100, Ferrara, Italy NATIONALLICENCE 700 1- Maynard B.J. Department of Biology, Colorado State University, Fort Collins, USA NATIONALLICENCE 773 0- Journal of Helminthology Cambridge University Press 73/2(1999-02), 95-102 0022-149X 73:2<95 1999 73 JHL CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge