Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar)
Classic offspring-size theory predicts that a single level of investment per offspring maximizes parental reproductive success in a given environment. Yet, substantial variation in offspring size is often observed among females within populations. Variation at this scale may occur because spatio-tem...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://hdl.handle.net/11250/2473367 https://doi.org/10.1139/cjfas-2012-0152 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2473367 2023-05-15T15:31:33+02:00 Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) Robertsen, Grethe Skoglund, Helge Einum, Sigurd 2013 http://hdl.handle.net/11250/2473367 https://doi.org/10.1139/cjfas-2012-0152 eng eng NRC Research Press http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0152 Norges forskningsråd: 223257 Norges forskningsråd: 193818 Canadian Journal of Fisheries and Aquatic Sciences. 2013, 70 (1), 5-12. urn:issn:0706-652X http://hdl.handle.net/11250/2473367 https://doi.org/10.1139/cjfas-2012-0152 cristin:962131 5-12 70 Canadian Journal of Fisheries and Aquatic Sciences 1 Journal article Peer reviewed 2013 ftntnutrondheimi https://doi.org/10.1139/cjfas-2012-0152 2019-09-17T06:53:25Z Classic offspring-size theory predicts that a single level of investment per offspring maximizes parental reproductive success in a given environment. Yet, substantial variation in offspring size is often observed among females within populations. Variation at this scale may occur because spatio-temporal variation in stabilizing selection prevents erosion of genetic variation. We tested if patterns of size-specific offspring survival of Atlantic salmon (Salmo salar) varies across location and season within a short stretch of a natural stream by manipulating the emergence timing of juveniles from 12 families with different mean egg sizes and assessing their performance at two locations. The relationship between egg size and juvenile survival varied temporally and spatially: large eggs were advantageous for early emergers in one location, whereas egg size had no effect in the other. Furthermore, the performance of later emerging juveniles did not depend on egg size in either location, possibly because the early emergers had grown or established territories. Thus, selection on offspring size can be complex and vary across short periods of time and small geographic distances, thereby preventing the erosion of genetic variation expected under consistent stabilising selection. breeding timing, density-dependent selection, maternal effects, natural selection acceptedVersion This is the authors' accepted and refereed manuscript to the article. The final publication is available at http://www.nrcresearchpress.com/doi/10.1139/cjfas-2012-0152#.WjtlQN_iYuU Article in Journal/Newspaper Atlantic salmon Salmo salar NTNU Open Archive (Norwegian University of Science and Technology) Canadian Journal of Fisheries and Aquatic Sciences 70 1 5 12 |
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Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Classic offspring-size theory predicts that a single level of investment per offspring maximizes parental reproductive success in a given environment. Yet, substantial variation in offspring size is often observed among females within populations. Variation at this scale may occur because spatio-temporal variation in stabilizing selection prevents erosion of genetic variation. We tested if patterns of size-specific offspring survival of Atlantic salmon (Salmo salar) varies across location and season within a short stretch of a natural stream by manipulating the emergence timing of juveniles from 12 families with different mean egg sizes and assessing their performance at two locations. The relationship between egg size and juvenile survival varied temporally and spatially: large eggs were advantageous for early emergers in one location, whereas egg size had no effect in the other. Furthermore, the performance of later emerging juveniles did not depend on egg size in either location, possibly because the early emergers had grown or established territories. Thus, selection on offspring size can be complex and vary across short periods of time and small geographic distances, thereby preventing the erosion of genetic variation expected under consistent stabilising selection. breeding timing, density-dependent selection, maternal effects, natural selection acceptedVersion This is the authors' accepted and refereed manuscript to the article. The final publication is available at http://www.nrcresearchpress.com/doi/10.1139/cjfas-2012-0152#.WjtlQN_iYuU |
format |
Article in Journal/Newspaper |
author |
Robertsen, Grethe Skoglund, Helge Einum, Sigurd |
spellingShingle |
Robertsen, Grethe Skoglund, Helge Einum, Sigurd Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
author_facet |
Robertsen, Grethe Skoglund, Helge Einum, Sigurd |
author_sort |
Robertsen, Grethe |
title |
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
title_short |
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
title_full |
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
title_fullStr |
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar) |
title_sort |
offspring size effects vary over fine spatio-temporal scales in atlantic salmon (salmo salar) |
publisher |
NRC Research Press |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/2473367 https://doi.org/10.1139/cjfas-2012-0152 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
5-12 70 Canadian Journal of Fisheries and Aquatic Sciences 1 |
op_relation |
http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0152 Norges forskningsråd: 223257 Norges forskningsråd: 193818 Canadian Journal of Fisheries and Aquatic Sciences. 2013, 70 (1), 5-12. urn:issn:0706-652X http://hdl.handle.net/11250/2473367 https://doi.org/10.1139/cjfas-2012-0152 cristin:962131 |
op_doi |
https://doi.org/10.1139/cjfas-2012-0152 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
1 |
container_start_page |
5 |
op_container_end_page |
12 |
_version_ |
1766362070492643328 |