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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Environmental constraints influencing survival of an African parasite in a north temperate habitat: effects of temperature on egg development
Author(s): Tinsley, Richard C
York, Jenny E
Everard, Amy L E
Stott, Lucy C
Chapple, Sara J
Tinsley, M C
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Keywords: Xenopus
alien species introductions
global warming
Host-parasite relationships.
Issue Date: Jul-2011
Date Deposited: 24-Aug-2011
Citation: Tinsley RC, York JE, Everard ALE, Stott LC, Chapple SJ & Tinsley MC (2011) Environmental constraints influencing survival of an African parasite in a north temperate habitat: effects of temperature on egg development. Parasitology, 138 (8), pp. 1029-1038.
Abstract: SUMMARYFactors affecting survival of parasites introduced to new geographical regions include changes in environmental temperature. Protopolystoma xenopodis is a monogenean introduced with the amphibian Xenopus laevis from South Africa to Wales (probably in the 1960s) where low water temperatures impose major constraints on life-cycle processes. Effects were quantified by maintenance of eggs from infections in Wales under controlled conditions at 10, 12, 15, 18, 20 and 25°C. The threshold for egg viability/ development was 15°C. Mean times to hatching were 22 days at 25°C, 32 days at 20°C, extending to 66 days at 15°C. Field temperature records provided calibration of transmission schedules. Although egg production continues year-round, all eggs produced during >8 months/ year die without hatching. Output contributing significantly to transmission is restricted to 10 weeks (May-mid-July). Host infection, beginning after a time lag of 8 weeks for egg development, is also restricted to 10 weeks (July-September). Habitat temperatures (mean 15·5°C in summer 2008) allow only a narrow margin for life-cycle progress: even small temperature increases, predicted with 'global warming', enhance infection. This system provides empirical data on the metrics of transmission permitting long-term persistence of isolated parasite populations in limiting environments.
DOI Link: 10.1017/S0031182011000461
Rights: Published in Parasitology. Copyright © Cambridge University Press 2011.; This paper has been accepted for publication and will appear in a revised form, subsequent to editorial input by Cambridge University Press, in Parasitology, Volume 138, Issue 8, (July 2011), pp. 1029 - 1038, published by Cambridge University Press, Copyright © Cambridge University Press 2011.

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