Winning the arms race: host-parasite shared evolutionary history reduces infection risks in fish final hosts.

Autor:	Sheath DJ; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK.; Institute of Global Health, University of Geneva, Geneva, Switzerland., Dick JTA; Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK., Dickey JWE; Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK., Guo Z; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK.; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou 570228, People's Republic of China., Andreou D; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK., Britton JR; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, UK rbritton@bournemouth.ac.uk.
Jazyk:	angličtina
Zdroj:	Biology letters [Biol Lett] 2018 Jul; Vol. 14 (7).
DOI:	10.1098/rsbl.2018.0363
Abstrakt:	Parasite manipulation of intermediate hosts evolves to increase parasite trophic transmission to final hosts, yet counter selection should act on the final host to reduce infection risk and costs. However, determining who wins this arms race and to what extent is challenging. Here, for the first time, comparative functional response analysis quantified final host consumption patterns with respect to intermediate host parasite status. Experiments used two evolutionarily experienced fish hosts and two naive hosts, and their amphipod intermediate hosts of the acanthocephalan parasite Pomphorhynchus tereticollis The two experienced fish consumed significantly fewer infected than non-infected prey, with lower attack rates and higher handling times towards the former. Conversely, the two naive fish consumed similar numbers of infected and non-infected prey at most densities, with similar attack rates and handling times towards both. Thus, evolutionarily experienced final hosts can reduce their infection risks and costs via reduced intermediate host consumption, with this not apparent in naive hosts. (© 2018 The Authors.)
Databáze:	MEDLINE
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