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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 96, No. 3, 2001, pp. 331-338
Bioline Code: oc01048
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 96, No. 3, 2001, pp. 331-338

 en Population Biology of Allocreadium lobatum Wallin, 1909 (Digenea: Allocreadiidae) in the Creek Chub, Semotilus atromaculatus, Mitchill (Osteichthyes: Cyprinadae), in a Nebraska Creek, USA
Monte S Willis


Allocreadium lobatum Wallin, 1909 has been reported in cyprinid species of freshwater fish in Canada and in the United States. The population biology of A. lobatum in the host Semotilus atromaculatus Mitchill was studied from May through December 1991, in a USA creek. Overall prevalence (64%) and mean intensity (4.4 ± 0.4) were greater than previously reported while abundance, reported for the first time, was 2.8 ± 0.3. Several trends in A. lobatum population biology as a function of S. atromaculatus length were identified. Mean intensity and abundance of A. lobatum increased with host size and significant differences in prevalence and A. lobatum lengths were found to correlate with host lengths.

population biology, Digenea, Allocreadium lobatum, Cyprinidae, Semotilus atromaculatus

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