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Can we predict the success of a parasite to colonise an invasive host?

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Abstract

To understand whether a parasite can exploit a novel invasive host species, we measured reproductive performance (number of eggs per female per day, egg size, development rate and size of new imagoes) of fleas from the Negev desert in Israel (two host generalists, Synosternus cleopatrae and Xenopsylla ramesis, and a host specialist, Parapulex chephrenis) when they exploited either a local murid host (Gerbillus andersoni, Meriones crassus and Acomys cahirinus) or two alien hosts (North American heteromyids, Chaetodipus penicillatus and Dipodomys merriami). We asked whether (1) reproductive performance of a flea differs between an alien and a characteristic hosts and (2) this difference is greater in a host specialist than in host generalists. The three fleas performed poorly on alien hosts as compared to local hosts, but the pattern of performance differed both among fleas and within fleas between alien hosts. The response to alien hosts did not depend on the degree of host specificity of a flea. We conclude that successful parasite colonisation of an invasive host is determined by some physiological, immunological and/or behavioural compatibility between a host and a parasite. This compatibility is unique for each host-parasite association, so that the success of a parasite to colonise an invasive host is unpredictable.

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Funding

This study was supported by the Israel Science Foundation (grant number 149/17 to BRK and ISK). LVDM received financial support from the Blaustein Center for Scientific Cooperation and the French Associates Institute for Agriculture and Biotechnology of Drylands. EMW received financial support from the Blaustein Center for Scientific Cooperation. This is publication no. 966 of the Mitrani Department of Desert Ecology.

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Correspondence to Luther van der Mescht.

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All experimental procedures met the requirements of the 1994 Law for the Prevention of Cruelty to Animals (Experiments on Animals) of the State of Israel and were approved by the Ben-Gurion University Committee for the Ethical Care and Use of Animals in Experiments under permit IL-11-02-14 issued to BPK and ISK.

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van der Mescht, L., Khokhlova, I.S., Warburton, E.M. et al. Can we predict the success of a parasite to colonise an invasive host?. Parasitol Res 117, 2305–2314 (2018). https://doi.org/10.1007/s00436-018-5921-8

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  • DOI: https://doi.org/10.1007/s00436-018-5921-8

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