Impact of precocious male parr on the effective size of a wild population of Atlantic salmon
Summary 1. There is growing evidence that sexually mature but morphologically juvenile males of Atlantic salmon (precocious or mature male parr) actively participate in reproduction and, therefore, in the genetic composition of the populations of this species. The impact of mature male parr on the e...
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crwiley:10.1111/j.1365-2427.2008.02062.x 2024-09-15T17:56:14+00:00 Impact of precocious male parr on the effective size of a wild population of Atlantic salmon SAURA, M. CABALLERO, A. CABALLERO, P. MORÁN, P. 2008 http://dx.doi.org/10.1111/j.1365-2427.2008.02062.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2008.02062.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2008.02062.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 53, issue 12, page 2375-2384 ISSN 0046-5070 1365-2427 journal-article 2008 crwiley https://doi.org/10.1111/j.1365-2427.2008.02062.x 2024-08-01T04:22:46Z Summary 1. There is growing evidence that sexually mature but morphologically juvenile males of Atlantic salmon (precocious or mature male parr) actively participate in reproduction and, therefore, in the genetic composition of the populations of this species. The impact of mature male parr on the effective population size ( N e ) of such populations has been previously studied under experimental settings, but no studies have been performed directly on natural populations. 2. Continuous monitoring and sampling of all sea returns is possible in the Lérez River (northwest of Spain). From demographic data on variances of reproductive success and genetic data from six microsatellite marker loci we carried out parentage assignment and assessed the impact of male parr on demographic and genetic estimates of N e in two consecutive years. 3. Our results reveal that: (i) approximately 60% of the total sire paternity is attributable to mature parr; (ii) mature parr decrease the variance of reproductive success of males by a threefold factor and increase the effective population size of males by a 10‐fold factor; (iii) however, they do not substantially affect the variance of reproductive success and the effective size of females; (iv) mature parr increase two‐to threefold the overall effective size of the population but the ratio N e / N , where N is the population size including or not mature parr in each case, is not affected. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Freshwater Biology 53 12 2375 2384 |
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Wiley Online Library |
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English |
description |
Summary 1. There is growing evidence that sexually mature but morphologically juvenile males of Atlantic salmon (precocious or mature male parr) actively participate in reproduction and, therefore, in the genetic composition of the populations of this species. The impact of mature male parr on the effective population size ( N e ) of such populations has been previously studied under experimental settings, but no studies have been performed directly on natural populations. 2. Continuous monitoring and sampling of all sea returns is possible in the Lérez River (northwest of Spain). From demographic data on variances of reproductive success and genetic data from six microsatellite marker loci we carried out parentage assignment and assessed the impact of male parr on demographic and genetic estimates of N e in two consecutive years. 3. Our results reveal that: (i) approximately 60% of the total sire paternity is attributable to mature parr; (ii) mature parr decrease the variance of reproductive success of males by a threefold factor and increase the effective population size of males by a 10‐fold factor; (iii) however, they do not substantially affect the variance of reproductive success and the effective size of females; (iv) mature parr increase two‐to threefold the overall effective size of the population but the ratio N e / N , where N is the population size including or not mature parr in each case, is not affected. |
format |
Article in Journal/Newspaper |
author |
SAURA, M. CABALLERO, A. CABALLERO, P. MORÁN, P. |
spellingShingle |
SAURA, M. CABALLERO, A. CABALLERO, P. MORÁN, P. Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
author_facet |
SAURA, M. CABALLERO, A. CABALLERO, P. MORÁN, P. |
author_sort |
SAURA, M. |
title |
Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
title_short |
Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
title_full |
Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
title_fullStr |
Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
title_full_unstemmed |
Impact of precocious male parr on the effective size of a wild population of Atlantic salmon |
title_sort |
impact of precocious male parr on the effective size of a wild population of atlantic salmon |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1111/j.1365-2427.2008.02062.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.2008.02062.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.2008.02062.x |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Freshwater Biology volume 53, issue 12, page 2375-2384 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2427.2008.02062.x |
container_title |
Freshwater Biology |
container_volume |
53 |
container_issue |
12 |
container_start_page |
2375 |
op_container_end_page |
2384 |
_version_ |
1810432443356807168 |