Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation?
It has been hypothesized that some stocks of Atlantic herring are subject to genetic exchange and therefore should fit the definition of a metapopulation with subunits. Genetic exchange requires spatial overlap of individuals from different populations during spawning. We investigated a local herrin...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1027.7854 2023-05-15T17:41:14+02:00 Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? Arne Johannessen Leif Nøttestad Georg Skaret The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1027.7854 http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1027.7854 http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf Clupea harengus interbreeding maturity metapopulation Northeast Atlantic herring population structure text 2009 ftciteseerx 2016-10-30T00:05:15Z It has been hypothesized that some stocks of Atlantic herring are subject to genetic exchange and therefore should fit the definition of a metapopulation with subunits. Genetic exchange requires spatial overlap of individuals from different populations during spawning. We investigated a local herring population that is assumed to feed and spawn within the semi-enclosed marine ecosystem of Lindåspollene in west Norway, which is connected with the outer fjord only by a narrow sill. Acoustic recordings and gillnet samples demonstrated the mixed presence of two components within a single school throughout the spawning period 2005– 2007. Members of the two components were of about the same size and in a similar stage of gonad development at all times, but the age composition was completely different. These observations represent the first documented case of different components being present in a spawning school and provide strong indications of regular interbreeding. Our data suggest that the two components represent autochthonous Lindås herring and allochthonous herring of coastal/oceanic origin, thereby supporting the metapopulation concept. Two alternative explanations, based on one migratory and one resident component of a single Lindås stock, are also discussed. Text Northeast Atlantic Unknown Norway |
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ftciteseerx |
language |
English |
topic |
Clupea harengus interbreeding maturity metapopulation Northeast Atlantic herring population structure |
spellingShingle |
Clupea harengus interbreeding maturity metapopulation Northeast Atlantic herring population structure Arne Johannessen Leif Nøttestad Georg Skaret Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
topic_facet |
Clupea harengus interbreeding maturity metapopulation Northeast Atlantic herring population structure |
description |
It has been hypothesized that some stocks of Atlantic herring are subject to genetic exchange and therefore should fit the definition of a metapopulation with subunits. Genetic exchange requires spatial overlap of individuals from different populations during spawning. We investigated a local herring population that is assumed to feed and spawn within the semi-enclosed marine ecosystem of Lindåspollene in west Norway, which is connected with the outer fjord only by a narrow sill. Acoustic recordings and gillnet samples demonstrated the mixed presence of two components within a single school throughout the spawning period 2005– 2007. Members of the two components were of about the same size and in a similar stage of gonad development at all times, but the age composition was completely different. These observations represent the first documented case of different components being present in a spawning school and provide strong indications of regular interbreeding. Our data suggest that the two components represent autochthonous Lindås herring and allochthonous herring of coastal/oceanic origin, thereby supporting the metapopulation concept. Two alternative explanations, based on one migratory and one resident component of a single Lindås stock, are also discussed. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Arne Johannessen Leif Nøttestad Georg Skaret |
author_facet |
Arne Johannessen Leif Nøttestad Georg Skaret |
author_sort |
Arne Johannessen |
title |
Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
title_short |
Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
title_full |
Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
title_fullStr |
Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
title_full_unstemmed |
Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
title_sort |
two components of northeast atlantic herring within the same school during spawning: support for the existence of a metapopulation? |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1027.7854 http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1027.7854 http://icesjms.oxfordjournals.org/content/66/8/1740.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766142668025364480 |