Natural selection for body shape in resource polymorphic Icelandic Arctic charr
Funding for this study was provided by Natural Sciences and Engineering Research Council of Canada and the Madame Vigdís Finnbogadóttir Scholarship. Resource polymorphisms exhibit remarkable intraspecific diversity and in many cases are expected to be maintained by diversifying selection. Phenotypic...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18320 2023-07-02T03:30:52+02:00 Natural selection for body shape in resource polymorphic Icelandic Arctic charr Franklin, Oliver D. Skúlason, Skúli Morrissey, Michael B. Ferguson, Moira M. University of St Andrews. School of Biology University of St Andrews. Centre for Biological Diversity 2019-08-16 15 application/pdf http://hdl.handle.net/10023/18320 https://doi.org/10.1111/jeb.13346 eng eng Journal of Evolutionary Biology Franklin , O D , Skúlason , S , Morrissey , M B & Ferguson , M M 2018 , ' Natural selection for body shape in resource polymorphic Icelandic Arctic charr ' , Journal of Evolutionary Biology , vol. Early View . https://doi.org/10.1111/jeb.13346 1010-061X PURE: 254740235 PURE UUID: e41e2360-1fc2-4f30-a347-d0790ac33456 crossref: 10.1111/jeb.13346 Scopus: 85052603574 WOS: 000446835700006 http://hdl.handle.net/10023/18320 https://doi.org/10.1111/jeb.13346 © 2018 The European Society for Evolutionary Biology. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1111/jeb.13346 Adaptation Intraspecific competition Natural selection Path analysis Performance gradients Phenotypic selection Selection differential Sympathetic diversification QH301 Biology SH Aquaculture. Fisheries. Angling NDAS QH301 SH Journal article 2019 ftstandrewserep https://doi.org/10.1111/jeb.13346 2023-06-13T18:29:40Z Funding for this study was provided by Natural Sciences and Engineering Research Council of Canada and the Madame Vigdís Finnbogadóttir Scholarship. Resource polymorphisms exhibit remarkable intraspecific diversity and in many cases are expected to be maintained by diversifying selection. Phenotypic trade‐offs can constrain morphologically intermediate individuals from effectively exploiting both alternate resources, resulting in ecological barriers to gene flow. Determining if and how phenotypic trade‐offs cause fitness variation in the wild is challenging because of phenotypic and environmental correlations associated with alternative resource strategies. We investigated multiple pathways through which morphology could affect organismal performance, as measured by growth rate, and whether these effects generate diversifying selection in polymorphic Icelandic Arctic charr (Salvelinus alpinus) populations. We considered direct effects of morphology on growth and indirect effects via trophic resource use, estimated by stable isotopic signatures, and via parasitism associated with trophic resources. We sampled over 3 years in (lakes) Thingvallavatn and Vatnshlíðarvatn using the extended selection gradient path analytical approach and estimating size‐dependent mortality. We found evidence for diversifying selection only in Thingvallavatn: more streamlined and terminally mouthed planktivore charr experienced greater growth, with the opposite pattern in small benthic charr. However, this effect was mediated by parasitism and nontrophic pathways, rather than trophic performance as often expected. Detection of between‐morph differences in the presence (Vatnshlíðarvatn) and direction (Thingvallavatn) of size‐dependent mortality, together with nontrophic effects of shape, suggests that a morphological trophic performance explanation for polymorphism is insufficient. This rare insight into selection during early diversification suggests that a complex of interacting local factors must be considered to understand how ... Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus University of St Andrews: Digital Research Repository Arctic Canada Vatnshlíðarvatn ENVELOPE(-19.628,-19.628,65.517,65.517) Journal of Evolutionary Biology 31 10 1498 1512 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Adaptation Intraspecific competition Natural selection Path analysis Performance gradients Phenotypic selection Selection differential Sympathetic diversification QH301 Biology SH Aquaculture. Fisheries. Angling NDAS QH301 SH |
spellingShingle |
Adaptation Intraspecific competition Natural selection Path analysis Performance gradients Phenotypic selection Selection differential Sympathetic diversification QH301 Biology SH Aquaculture. Fisheries. Angling NDAS QH301 SH Franklin, Oliver D. Skúlason, Skúli Morrissey, Michael B. Ferguson, Moira M. Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
topic_facet |
Adaptation Intraspecific competition Natural selection Path analysis Performance gradients Phenotypic selection Selection differential Sympathetic diversification QH301 Biology SH Aquaculture. Fisheries. Angling NDAS QH301 SH |
description |
Funding for this study was provided by Natural Sciences and Engineering Research Council of Canada and the Madame Vigdís Finnbogadóttir Scholarship. Resource polymorphisms exhibit remarkable intraspecific diversity and in many cases are expected to be maintained by diversifying selection. Phenotypic trade‐offs can constrain morphologically intermediate individuals from effectively exploiting both alternate resources, resulting in ecological barriers to gene flow. Determining if and how phenotypic trade‐offs cause fitness variation in the wild is challenging because of phenotypic and environmental correlations associated with alternative resource strategies. We investigated multiple pathways through which morphology could affect organismal performance, as measured by growth rate, and whether these effects generate diversifying selection in polymorphic Icelandic Arctic charr (Salvelinus alpinus) populations. We considered direct effects of morphology on growth and indirect effects via trophic resource use, estimated by stable isotopic signatures, and via parasitism associated with trophic resources. We sampled over 3 years in (lakes) Thingvallavatn and Vatnshlíðarvatn using the extended selection gradient path analytical approach and estimating size‐dependent mortality. We found evidence for diversifying selection only in Thingvallavatn: more streamlined and terminally mouthed planktivore charr experienced greater growth, with the opposite pattern in small benthic charr. However, this effect was mediated by parasitism and nontrophic pathways, rather than trophic performance as often expected. Detection of between‐morph differences in the presence (Vatnshlíðarvatn) and direction (Thingvallavatn) of size‐dependent mortality, together with nontrophic effects of shape, suggests that a morphological trophic performance explanation for polymorphism is insufficient. This rare insight into selection during early diversification suggests that a complex of interacting local factors must be considered to understand how ... |
author2 |
University of St Andrews. School of Biology University of St Andrews. Centre for Biological Diversity |
format |
Article in Journal/Newspaper |
author |
Franklin, Oliver D. Skúlason, Skúli Morrissey, Michael B. Ferguson, Moira M. |
author_facet |
Franklin, Oliver D. Skúlason, Skúli Morrissey, Michael B. Ferguson, Moira M. |
author_sort |
Franklin, Oliver D. |
title |
Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
title_short |
Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
title_full |
Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
title_fullStr |
Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
title_full_unstemmed |
Natural selection for body shape in resource polymorphic Icelandic Arctic charr |
title_sort |
natural selection for body shape in resource polymorphic icelandic arctic charr |
publishDate |
2019 |
url |
http://hdl.handle.net/10023/18320 https://doi.org/10.1111/jeb.13346 |
long_lat |
ENVELOPE(-19.628,-19.628,65.517,65.517) |
geographic |
Arctic Canada Vatnshlíðarvatn |
geographic_facet |
Arctic Canada Vatnshlíðarvatn |
genre |
Arctic Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Salvelinus alpinus |
op_relation |
Journal of Evolutionary Biology Franklin , O D , Skúlason , S , Morrissey , M B & Ferguson , M M 2018 , ' Natural selection for body shape in resource polymorphic Icelandic Arctic charr ' , Journal of Evolutionary Biology , vol. Early View . https://doi.org/10.1111/jeb.13346 1010-061X PURE: 254740235 PURE UUID: e41e2360-1fc2-4f30-a347-d0790ac33456 crossref: 10.1111/jeb.13346 Scopus: 85052603574 WOS: 000446835700006 http://hdl.handle.net/10023/18320 https://doi.org/10.1111/jeb.13346 |
op_rights |
© 2018 The European Society for Evolutionary Biology. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1111/jeb.13346 |
op_doi |
https://doi.org/10.1111/jeb.13346 |
container_title |
Journal of Evolutionary Biology |
container_volume |
31 |
container_issue |
10 |
container_start_page |
1498 |
op_container_end_page |
1512 |
_version_ |
1770275167908397056 |