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Seasonal dynamics in abundance, development and pattern of infection of Bunodera luciopercae (Müller) in perch, Perca fluviatilis L. from an oligotrophic lake in Norway
Author(s) -
Skorping A.
Publication year - 1981
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1981.tb03781.x
Subject(s) - perch , biology , abundance (ecology) , larva , parasite hosting , percidae , fish <actinopterygii> , ecology , zoology , fishery , world wide web , computer science
Samples of perch, Perca fluviatilis L., were examined monthly for the presence of the intestinal trematode Bunodera luciopercae (Müller). Marked seasonal cycles in incidence and intensity of infection were found, with a minimum level in July, when all the fish examined were free of the fluke, and a maximum level in February. Five developmental stages of the fluke were recognized and the seasonal changes in the percentage distribution of these stages were studied. Infective larvae were found in the period August–March, with a peak in January. Gravid worms were mainly found in the period May‐June. The frequency distribution of parasite counts were over‐dispersed and followed the negative binomial distribution within fish samples from different periods of the year.