Studies on austrobilharzia terrigalensis (trematoda : schistosomatidae) in the swan estuary, Western Australia: Observations on the biology of the cercaria

C.C. Appleton

doi:10.1016/0020-7519(83)90035-8

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Studies on austrobilharzia terrigalensis (trematoda : schistosomatidae) in the swan estuary, Western Australia: Observations on the biology of the cercaria

Journal article

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Studies on austrobilharzia terrigalensis (trematoda : schistosomatidae) in the swan estuary, Western Australia: Observations on the biology of the cercaria

C.C. Appleton

International Journal for Parasitology, Vol.13(3), pp.239-247

1983

DOI: https://doi.org/10.1016/0020-7519(83)90035-8

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Abstract

The emergence of Austrobilharzia terrigalensis cercariae from the snail Velacumantus australis decreased with decreasing salinity and temperature. This was most marked between 23 and 25 and between 24 and 19°C. Very few cercariae were shed below 23 regardless of temperature. The decrease in cercarial emergence was associated with the decreasing metabolic activity of the intermediate host. The emergence pattern of A. terrigalensis cercariae from V. australis was diurnal. There was a major peak between 08h00 and 10h00 and a minor second one between 16h00 and 18h00. No cercariae were shed between 22h00 and 04h00. Cercariae survived in sea water (35) for up to 48h, with a half-life of 30h. There was evidence that the prevalence of A. terrigalensis infection in the intermediate host population in the Swan estuary was higher during the summer than during the winter. The production of cercariae in the sporocyst also appeared to be a seasonal phenomenon. Mature cercariae were rare in sporocysts examined during the winter months (May-October) and absent altogether from those examined in September.

Details

Title: Studies on austrobilharzia terrigalensis (trematoda : schistosomatidae) in the swan estuary, Western Australia: Observations on the biology of the cercaria
Authors/Creators: C.C. Appleton (Author/Creator) - Murdoch University
Publication Details: International Journal for Parasitology, Vol.13(3), pp.239-247
Publisher: Elsevier BV
Identifiers: 991005543484807891
Murdoch Affiliation: School of Environmental and Life Sciences
Language: English
Resource Type: Journal article

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Citation topics: 1 Clinical & Life Sciences; 1.163 Parasitology - General; 1.163.645 Fish Parasitology
Web Of Science research areas: Parasitology
ESI research areas: Microbiology