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MHC-mediated mate choice increases parasite resistance in salmon

Sofia Consuegra, Carlos Garcia De Leaniz Orcid Logo, Sofia Consuegra del Olmo Orcid Logo

Proceedings of the Royal Society B: Biological Sciences, Volume: 275, Issue: 1641, Pages: 1397 - 1403

Swansea University Authors: Carlos Garcia De Leaniz Orcid Logo, Sofia Consuegra del Olmo Orcid Logo

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DOI (Published version): 10.1098/rspb.2008.0066

Abstract

Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation, and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis...

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Published in: Proceedings of the Royal Society B: Biological Sciences
ISSN: 0962-8452 1471-2954
Published: 2008
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URI: https://cronfa.swan.ac.uk/Record/cronfa915
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spelling 2017-10-25T17:06:41.3861386 v2 915 2012-02-23 MHC-mediated mate choice increases parasite resistance in salmon 1c70acd0fd64edb0856b7cf34393ab02 0000-0003-1650-2729 Carlos Garcia De Leaniz Carlos Garcia De Leaniz true false 241f2810ab8f56be53ca8af23e384c6e 0000-0003-4403-2509 Sofia Consuegra del Olmo Sofia Consuegra del Olmo true false 2012-02-23 SBI Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation, and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis loads amongst anadromous Atlantic salmon returning to four rivers to spawn which had originated from natural spawning (parents allowed to mate freely) or from artificial crosses (parents deprived from the potential benefits of mate choice). We found that the offspring of artificially-bred salmon had higher parasite loads and were almost 4 times more likely to be infected than free-mating salmon, despite having similar levels of MHC diversity. Moreover, the offspring of wild salmon were more MHC-dissimilar than the offspring of artificially-crossed salmon, and uninfected fish were more dissimilar for MHC than infected fish. Thus, our results suggest a link between disassortative mating and offspring benefits, and indicate that MHC-mediated mate choice and natural (parasite-driven) selection act in combination to maintain MHC diversity, and hence fitness. Therefore, artificial breeding programmes that negate the potential genetic benefits of mate choice may result in inherently inferior offspring, regardless of population size, rearing conditions, or genetic diversity. Journal Article Proceedings of the Royal Society B: Biological Sciences 275 1641 1397 1403 0962-8452 1471-2954 MHC, mate choice, good genes, compatible genes, parasite resistance, salmon 31 12 2008 2008-12-31 10.1098/rspb.2008.0066 The author made a substantial contribution to: (a) 1. the conception and design of the study;2. the organisation of the conduct of the study3. carrying out the study (including acquisition of study data) and also to 4. to analysis andinterpretation of study data.as well as (b) 2. The author helped draft the output; COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2017-10-25T17:06:41.3861386 2012-02-23T17:02:00.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Sofia Consuegra 1 Carlos Garcia De Leaniz 0000-0003-1650-2729 2 Sofia Consuegra del Olmo 0000-0003-4403-2509 3
title MHC-mediated mate choice increases parasite resistance in salmon
spellingShingle MHC-mediated mate choice increases parasite resistance in salmon
Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
title_short MHC-mediated mate choice increases parasite resistance in salmon
title_full MHC-mediated mate choice increases parasite resistance in salmon
title_fullStr MHC-mediated mate choice increases parasite resistance in salmon
title_full_unstemmed MHC-mediated mate choice increases parasite resistance in salmon
title_sort MHC-mediated mate choice increases parasite resistance in salmon
author_id_str_mv 1c70acd0fd64edb0856b7cf34393ab02
241f2810ab8f56be53ca8af23e384c6e
author_id_fullname_str_mv 1c70acd0fd64edb0856b7cf34393ab02_***_Carlos Garcia De Leaniz
241f2810ab8f56be53ca8af23e384c6e_***_Sofia Consuegra del Olmo
author Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
author2 Sofia Consuegra
Carlos Garcia De Leaniz
Sofia Consuegra del Olmo
format Journal article
container_title Proceedings of the Royal Society B: Biological Sciences
container_volume 275
container_issue 1641
container_start_page 1397
publishDate 2008
institution Swansea University
issn 0962-8452
1471-2954
doi_str_mv 10.1098/rspb.2008.0066
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
active_str 0
description Natural (parasite-driven) and sexual selection are thought to maintain high polymorphism in the genes of the major histocompatibility complex (MHC), but support for a link between mate choice, MHC variation, and increased parasite resistance is circumstantial. We compared MHC diversity and Anisakis loads amongst anadromous Atlantic salmon returning to four rivers to spawn which had originated from natural spawning (parents allowed to mate freely) or from artificial crosses (parents deprived from the potential benefits of mate choice). We found that the offspring of artificially-bred salmon had higher parasite loads and were almost 4 times more likely to be infected than free-mating salmon, despite having similar levels of MHC diversity. Moreover, the offspring of wild salmon were more MHC-dissimilar than the offspring of artificially-crossed salmon, and uninfected fish were more dissimilar for MHC than infected fish. Thus, our results suggest a link between disassortative mating and offspring benefits, and indicate that MHC-mediated mate choice and natural (parasite-driven) selection act in combination to maintain MHC diversity, and hence fitness. Therefore, artificial breeding programmes that negate the potential genetic benefits of mate choice may result in inherently inferior offspring, regardless of population size, rearing conditions, or genetic diversity.
published_date 2008-12-31T03:03:29Z
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score 11.035634

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