Journal article
Host resistance and tolerance to parasitism: Development-dependent fitness consequences in common hourglass tree frog (Polypedates cruciger) tadpoles exposed to two larval trematodes
Canadian Journal of Zoology, Vol.97(11), pp.1021-1029
2019
Abstract
Tolerance and resistance to parasites are defense strategies of host organisms. Here, we tested the development-dependent tolerance and resistance of Polypedates cruciger Blyth, 1852 tadpoles to trematode infection. We exposed the tadpoles at Gosner stages 27, 28–29, and 30–31 to two types of cercariae (furcocercous and pleurolophocercous cercariae of Acanthostomum burminis (Bhalerao, 1926)) under laboratory conditions. To determine tolerance (the ability of a host to limit health effects of a given parasite load), we exposed the tadpoles until all cercariae penetrated the host. As a measure of determining resistance, we exposed tadpoles to cercariae for a limited time and counted the number of cercariae penetrating the tadpoles. The survival of tadpoles exposed at early stages was significantly lower than that of tadpoles exposed at later stages (mixed-effect model, p < 0.05), suggesting an age-dependent tolerance to parasitism. Tadpoles exposed at early stages were also smaller, took longer to metamorphosis, showed lower resistance to parasitism (ANOVA, p < 0.001), and developed axial malformations. In the resistance experiment, fewer parasites penetrated later stage tadpoles than early stage tadpoles. Tadpoles of P. cruciger showed a development-dependent tolerance and resistance to parasitism, resulting in greater survival and fewer malformations when parasitism occurs at late stages.
Details
- Title
- Host resistance and tolerance to parasitism: Development-dependent fitness consequences in common hourglass tree frog (Polypedates cruciger) tadpoles exposed to two larval trematodes
- Authors/Creators
- N.U.K. Pathirana (Author/Creator)M. Meegaskumbura (Author/Creator)R.S. Rajakaruna (Author/Creator)
- Publication Details
- Canadian Journal of Zoology, Vol.97(11), pp.1021-1029
- Publisher
- NRC Research Press
- Identifiers
- 991005542987307891
- Copyright
- © 2019 Canadian Science Publishing
- Murdoch Affiliation
- Centre for Sustainable Aquatic Ecosystems; Freshwater Fish Group and Fish Health Unit; School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Domestic collaboration
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.790 Amphibian Ecology
- Web Of Science research areas
- Zoology
- ESI research areas
- Plant & Animal Science