The genetics of a managed Atlantic salmon stock and implications for conservation.
Numerous populations of wild Atlantic salmon have declined in recent years. The Atlantic salmon in Girnock Burn, an upland spate tributary of the River Dee, Scotland have been monitored intensely by government scientists since 1966. The burn is equipped with upstream and downstream traps, which have...
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University of Stirling
2007
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ftunivstirling:oai:dspace.stir.ac.uk:1893/227 2023-05-15T15:29:16+02:00 The genetics of a managed Atlantic salmon stock and implications for conservation. Frake, Karen Taggart, John B. Teale, Alan J. School of Natural Sciences Aquaculture 2007-04 application/pdf http://hdl.handle.net/1893/227 http://dspace.stir.ac.uk/bitstream/1893/227/1/THESISIIksf.pdf en eng University of Stirling http://hdl.handle.net/1893/227 http://dspace.stir.ac.uk/bitstream/1893/227/1/THESISIIksf.pdf Atlantic salmon conservation Scotland Atlantic salmon Numbers of species Scotland Atlantic salmon Conservation Scotland Thesis or Dissertation Doctoral Doctor of Philosophy 2007 ftunivstirling 2022-06-13T18:42:33Z Numerous populations of wild Atlantic salmon have declined in recent years. The Atlantic salmon in Girnock Burn, an upland spate tributary of the River Dee, Scotland have been monitored intensely by government scientists since 1966. The burn is equipped with upstream and downstream traps, which have enabled monitoring of juveniles leaving the burn and adults returning to it since 1966. Recently, due to a decline in numbers of female returns, a supportive breeding program was instigated. Using microsatellite-based DNA profiling, this study exploited existing and novel tissue samples to investigate aspects of Atlantic salmon biology and conservation. A panel of up to 12, mainly highly polymorphic, microsatellite loci were employed to derive allele frequency data and to resolve parentage in egg, parr, smolt and anadromous adult samples taken between 1991 and 2004. Genotyping error was investigated and rectified where possible. Overall, the detected error was low (c.0.5%), providing confidence in subsequent population and parentage analyses. The error rate involved in estimating the age of salmon in Girnock Burn from scale readings was also estimated (c.2-8%). A study of the dynamics of natural spawning, based on the parentage of parr, confirmed that multiple matings by anadromous returns of both sexes were prevalent. Not all anadromous returns were apparently successful spawners; data from parr and existing redd samples failed to detect a contribution from 35% of males and 29% of females. An important aspect of the work was to determine the success of the supportive breeding program. Results showed that, in comparison to natural spawning, the program gave a more complete and even representation of adult spawners in offspring. In addition, there was no detectable difference in the output (number of smolts) of the two schemes when the number of eggs used in each was taken into account. The distribution of juvenile kin (parr aged 1+) within the burn was determined, which revealed clustering of full and half sib ... Doctoral or Postdoctoral Thesis Atlantic salmon University of Stirling: Stirling Digital Research Repository Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) Spate ENVELOPE(76.102,76.102,-69.418,-69.418) |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Atlantic salmon conservation Scotland Atlantic salmon Numbers of species Scotland Atlantic salmon Conservation Scotland |
spellingShingle |
Atlantic salmon conservation Scotland Atlantic salmon Numbers of species Scotland Atlantic salmon Conservation Scotland Frake, Karen The genetics of a managed Atlantic salmon stock and implications for conservation. |
topic_facet |
Atlantic salmon conservation Scotland Atlantic salmon Numbers of species Scotland Atlantic salmon Conservation Scotland |
description |
Numerous populations of wild Atlantic salmon have declined in recent years. The Atlantic salmon in Girnock Burn, an upland spate tributary of the River Dee, Scotland have been monitored intensely by government scientists since 1966. The burn is equipped with upstream and downstream traps, which have enabled monitoring of juveniles leaving the burn and adults returning to it since 1966. Recently, due to a decline in numbers of female returns, a supportive breeding program was instigated. Using microsatellite-based DNA profiling, this study exploited existing and novel tissue samples to investigate aspects of Atlantic salmon biology and conservation. A panel of up to 12, mainly highly polymorphic, microsatellite loci were employed to derive allele frequency data and to resolve parentage in egg, parr, smolt and anadromous adult samples taken between 1991 and 2004. Genotyping error was investigated and rectified where possible. Overall, the detected error was low (c.0.5%), providing confidence in subsequent population and parentage analyses. The error rate involved in estimating the age of salmon in Girnock Burn from scale readings was also estimated (c.2-8%). A study of the dynamics of natural spawning, based on the parentage of parr, confirmed that multiple matings by anadromous returns of both sexes were prevalent. Not all anadromous returns were apparently successful spawners; data from parr and existing redd samples failed to detect a contribution from 35% of males and 29% of females. An important aspect of the work was to determine the success of the supportive breeding program. Results showed that, in comparison to natural spawning, the program gave a more complete and even representation of adult spawners in offspring. In addition, there was no detectable difference in the output (number of smolts) of the two schemes when the number of eggs used in each was taken into account. The distribution of juvenile kin (parr aged 1+) within the burn was determined, which revealed clustering of full and half sib ... |
author2 |
Taggart, John B. Teale, Alan J. School of Natural Sciences Aquaculture |
format |
Doctoral or Postdoctoral Thesis |
author |
Frake, Karen |
author_facet |
Frake, Karen |
author_sort |
Frake, Karen |
title |
The genetics of a managed Atlantic salmon stock and implications for conservation. |
title_short |
The genetics of a managed Atlantic salmon stock and implications for conservation. |
title_full |
The genetics of a managed Atlantic salmon stock and implications for conservation. |
title_fullStr |
The genetics of a managed Atlantic salmon stock and implications for conservation. |
title_full_unstemmed |
The genetics of a managed Atlantic salmon stock and implications for conservation. |
title_sort |
genetics of a managed atlantic salmon stock and implications for conservation. |
publisher |
University of Stirling |
publishDate |
2007 |
url |
http://hdl.handle.net/1893/227 http://dspace.stir.ac.uk/bitstream/1893/227/1/THESISIIksf.pdf |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) ENVELOPE(76.102,76.102,-69.418,-69.418) |
geographic |
Dee Spate |
geographic_facet |
Dee Spate |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://hdl.handle.net/1893/227 http://dspace.stir.ac.uk/bitstream/1893/227/1/THESISIIksf.pdf |
_version_ |
1766359656673837056 |