Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success
In Atlantic salmon, as in most salmonids, males can mature early in the life cycle, as small freshwater fish, termed parr, and/or undergo a sea migration before maturing as full-size adults. The alternative life histories are contingent on environmental and social circumstances, such as growth rate,...
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ftpubmed:oai:pubmedcentral.nih.gov:1688240 2023-05-15T15:31:39+02:00 Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success Thomaz, D. Beall, E. Burke, T. 1997-02-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1688240 https://doi.org/10.1098/rspb.1997.0031 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1688240 http://dx.doi.org/10.1098/rspb.1997.0031 Article Text 1997 ftpubmed https://doi.org/10.1098/rspb.1997.0031 2013-08-31T12:25:57Z In Atlantic salmon, as in most salmonids, males can mature early in the life cycle, as small freshwater fish, termed parr, and/or undergo a sea migration before maturing as full-size adults. The alternative life histories are contingent on environmental and social circumstances, such as growth rate, territory quality or any other factor that affects the individual's state. In order to model the choice of life history in this group of commercially valuable species, it is necessary to understand not only the relative contribution of the different male types to subsequent generations, but also to know the factors that affect reproductive success in each type. In this paper we present the results of a study designed to investigate the factors that affect the reproductive success of mature parr. We used highly polymorphic minisatellite DNA markers to analyse paternity in a series of mating experiments where the number and body size of parr were manipulated. The fraction of eggs fertilized by mature parr ranged from 26 to 40 per cent, with individual parr fertilizing up to 26 per cent of the eggs. A strong positive correlation was found between parr size and reproductive success. The relative success of parr decreased with increasing parr number. Data from this and other studies on variation in the timing and degree of parr reproductive success are discussed in relation to the evolution of male mating strategies and life history in salmonids. Text Atlantic salmon PubMed Central (PMC) Proceedings of the Royal Society of London. Series B: Biological Sciences 264 1379 219 226 |
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Article Thomaz, D. Beall, E. Burke, T. Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
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Article |
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In Atlantic salmon, as in most salmonids, males can mature early in the life cycle, as small freshwater fish, termed parr, and/or undergo a sea migration before maturing as full-size adults. The alternative life histories are contingent on environmental and social circumstances, such as growth rate, territory quality or any other factor that affects the individual's state. In order to model the choice of life history in this group of commercially valuable species, it is necessary to understand not only the relative contribution of the different male types to subsequent generations, but also to know the factors that affect reproductive success in each type. In this paper we present the results of a study designed to investigate the factors that affect the reproductive success of mature parr. We used highly polymorphic minisatellite DNA markers to analyse paternity in a series of mating experiments where the number and body size of parr were manipulated. The fraction of eggs fertilized by mature parr ranged from 26 to 40 per cent, with individual parr fertilizing up to 26 per cent of the eggs. A strong positive correlation was found between parr size and reproductive success. The relative success of parr decreased with increasing parr number. Data from this and other studies on variation in the timing and degree of parr reproductive success are discussed in relation to the evolution of male mating strategies and life history in salmonids. |
format |
Text |
author |
Thomaz, D. Beall, E. Burke, T. |
author_facet |
Thomaz, D. Beall, E. Burke, T. |
author_sort |
Thomaz, D. |
title |
Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
title_short |
Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
title_full |
Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
title_fullStr |
Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
title_full_unstemmed |
Alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
title_sort |
alternative reproductive tactics in atlantic salmon: factors affecting mature parr success |
publishDate |
1997 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1688240 https://doi.org/10.1098/rspb.1997.0031 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1688240 http://dx.doi.org/10.1098/rspb.1997.0031 |
op_doi |
https://doi.org/10.1098/rspb.1997.0031 |
container_title |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
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264 |
container_issue |
1379 |
container_start_page |
219 |
op_container_end_page |
226 |
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1766362181628067840 |