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 |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2013
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0152 |
id |
crcansciencepubl:10.1139/cjfas-2012-0152 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjfas-2012-0152 2023-12-17T10:27:19+01:00 Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon ( Salmo salar ) Robertsen, Grethe Skoglund, Helge Einum, Sigurd Fraser, Dylan 2013 http://dx.doi.org/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0152 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 1, page 5-12 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjfas-2012-0152 2023-11-19T13:38:27Z 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 whether 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 stabilizing selection. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 70 1 5 12 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Robertsen, Grethe Skoglund, Helge Einum, Sigurd Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon ( Salmo salar ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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 whether 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 stabilizing selection. |
author2 |
Fraser, Dylan |
format |
Article in Journal/Newspaper |
author |
Robertsen, Grethe Skoglund, Helge Einum, Sigurd |
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 |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0152 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0152 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 1, page 5-12 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
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_ |
1785579145484304384 |