Interactions of warming and exposure affect susceptibility to parasite infection in a temperate fish species.

Sheath, D.J., Andreou, D. and Britton, J.R., 2016. Interactions of warming and exposure affect susceptibility to parasite infection in a temperate fish species. Parasitology, 143 (10), 1340 - 1346.

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DOI: 10.1017/S0031182016000846

Abstract

Predicting how elevated temperatures from climate change alter host-parasite interactions requires understandings of how warming affects host susceptibility and parasite virulence. Here, the effect of elevated water temperature and parasite exposure level was tested on parasite prevalence, abundance and burden, and on fish growth, using Pomphorhynchus laevis and its fish host Squalius cephalus. At 60 days post-exposure, prevalence was higher at the elevated temperature (22 °C) than ambient temperature (18 °C), with infections achieved at considerably lower levels of exposure. Whilst parasite number was significantly higher in infected fish at 22 °C, both mean parasite weight and parasite burden was significantly higher at 18 °C. There were, however, no significant relationships between fish growth rate and temperature, parasite exposure, and the infection parameters. Thus, whilst elevated temperature significantly influenced parasite infection rates, it also impacted parasite development rates, suggesting warming could have complex implications for parasite dynamics and host resistance.

Item Type:Article
ISSN:0031-1820
Uncontrolled Keywords:Pomphorhynchus laevis ; Squalius cephalus ; climate change ; parasite abundance ; parasite prevalence
Subjects:UNSPECIFIED
Group:Faculty of Science & Technology
ID Code:23911
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:14 Jun 2016 15:55
Last Modified:28 Nov 2016 09:32

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