Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability
The spatial distribution of breeders within populations may have important implications for offspring habitat availability in species where mobility of early life stages is restricted. Here we address this issue using time series of spawner distributions from eight Norwegian Atlantic salmon ( Salmo...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2010
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f10-122 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-122 |
id |
crcansciencepubl:10.1139/f10-122 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f10-122 2023-12-17T10:27:19+01:00 Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability Finstad, Anders Gravbrøt Einum, Sigurd Sættem, Leif Magnus Hellen, Bjart Are Fleming, Ian 2010 http://dx.doi.org/10.1139/f10-122 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-122 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 67, issue 12, page 1993-2001 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2010 crcansciencepubl https://doi.org/10.1139/f10-122 2023-11-19T13:39:11Z The spatial distribution of breeders within populations may have important implications for offspring habitat availability in species where mobility of early life stages is restricted. Here we address this issue using time series of spawner distributions from eight Norwegian Atlantic salmon ( Salmo salar ) populations. Whereas spawners distribute themselves uniformly along the length of the rivers in some populations, others show a heavily skewed distribution. Linear mixed models identified pronounced and temporally consistent among-population differences in spawner distributions. Using a model of limited juvenile dispersal from nests following emergence, we show that the observed spawner distributions are predicted to result in significant proportions of rivers being inaccessible for young of the year during early life stages, and the magnitude of this effect differs among populations (e.g., ranging from 27% to 59% for dispersal distance of 250 m). Thus, assuming population regulation during early but not later juvenile stages, consistent differences in spawner distributions among populations such as those observed here may translate into differences in productivity (i.e., carrying capacity) as well as egg densities required for populations to reach their spawning targets. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 67 12 1993 2001 |
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 Finstad, Anders Gravbrøt Einum, Sigurd Sættem, Leif Magnus Hellen, Bjart Are Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The spatial distribution of breeders within populations may have important implications for offspring habitat availability in species where mobility of early life stages is restricted. Here we address this issue using time series of spawner distributions from eight Norwegian Atlantic salmon ( Salmo salar ) populations. Whereas spawners distribute themselves uniformly along the length of the rivers in some populations, others show a heavily skewed distribution. Linear mixed models identified pronounced and temporally consistent among-population differences in spawner distributions. Using a model of limited juvenile dispersal from nests following emergence, we show that the observed spawner distributions are predicted to result in significant proportions of rivers being inaccessible for young of the year during early life stages, and the magnitude of this effect differs among populations (e.g., ranging from 27% to 59% for dispersal distance of 250 m). Thus, assuming population regulation during early but not later juvenile stages, consistent differences in spawner distributions among populations such as those observed here may translate into differences in productivity (i.e., carrying capacity) as well as egg densities required for populations to reach their spawning targets. |
author2 |
Fleming, Ian |
format |
Article in Journal/Newspaper |
author |
Finstad, Anders Gravbrøt Einum, Sigurd Sættem, Leif Magnus Hellen, Bjart Are |
author_facet |
Finstad, Anders Gravbrøt Einum, Sigurd Sættem, Leif Magnus Hellen, Bjart Are |
author_sort |
Finstad, Anders Gravbrøt |
title |
Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
title_short |
Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
title_full |
Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
title_fullStr |
Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
title_full_unstemmed |
Spatial distribution of Atlantic salmon (Salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
title_sort |
spatial distribution of atlantic salmon (salmo salar) breeders: among- and within-river variation and predicted consequences for offspring habitat availability |
publisher |
Canadian Science Publishing |
publishDate |
2010 |
url |
http://dx.doi.org/10.1139/f10-122 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F10-122 http://www.nrcresearchpress.com/doi/pdf/10.1139/F10-122 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 67, issue 12, page 1993-2001 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f10-122 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
67 |
container_issue |
12 |
container_start_page |
1993 |
op_container_end_page |
2001 |
_version_ |
1785579150120058880 |