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

Authors: Sheath, D., Dick, J.T.A., Dickey, J.W.E., Guo, Z., Andreou, D. and Britton, J.

http://eprints.bournemouth.ac.uk/31064/

Journal: Biology Letters

Volume: 14

Publisher: The Royal Society

ISSN: 1744-9561

DOI: 10.1098/rsbl.2018.0363

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.

This data was imported from PubMed:

Authors: Sheath, D.J., Dick, J.T.A., Dickey, J.W.E., Guo, Z., Andreou, D. and Britton, J.R.

http://eprints.bournemouth.ac.uk/31064/

Journal: Biol Lett

Volume: 14

Issue: 7

eISSN: 1744-957X

DOI: 10.1098/rsbl.2018.0363

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.

This data was imported from Scopus:

Authors: Sheath, D.J., Dick, J.T.A., Dickey, J.W.E., Guo, Z., Andreou, D. and Robert Britton, J.

http://eprints.bournemouth.ac.uk/31064/

Journal: Biology Letters

Volume: 14

Issue: 7

eISSN: 1744-957X

ISSN: 1744-9561

DOI: 10.1098/rsbl.2018.0363

© 2018 The Author(s) Published by the Royal Society. All rights reserved. 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.

This data was imported from Web of Science (Lite):

Authors: Sheath, D.J., Dick, J.T.A., Dickey, J.W.E., Guo, Z., Andreou, D. and Britton, J.R.

http://eprints.bournemouth.ac.uk/31064/

Journal: BIOLOGY LETTERS

Volume: 14

Issue: 7

eISSN: 1744-957X

ISSN: 1744-9561

DOI: 10.1098/rsbl.2018.0363

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