Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program
Abstract Captive‐breeding programs can be implemented to preserve the genetic diversity of endangered populations such that the controlled release of captive‐bred individuals into the wild may promote recovery. A common difficulty, however, is that programs are founded with limited wild broodstock,...
Published in: | Conservation Biology |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2014
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/cobi.12188 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fcobi.12188 http://onlinelibrary.wiley.com/wol1/doi/10.1111/cobi.12188/fullpdf |
id |
crwiley:10.1111/cobi.12188 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/cobi.12188 2024-09-15T17:56:31+00:00 Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program ROLLINSON, NJAL KEITH, DAVE M. HOUDE, AIMEE LEE S. DEBES, PAUL V. MCBRIDE, MEGHAN C. HUTCHINGS, JEFFREY A. Killam Trust Memorial Scholarship NSERC CGS Scholarship NSERC Discovery grant NSERC Strategic Grant 2014 http://dx.doi.org/10.1111/cobi.12188 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fcobi.12188 http://onlinelibrary.wiley.com/wol1/doi/10.1111/cobi.12188/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Conservation Biology volume 28, issue 2, page 529-540 ISSN 0888-8892 1523-1739 journal-article 2014 crwiley https://doi.org/10.1111/cobi.12188 2024-07-18T04:23:04Z Abstract Captive‐breeding programs can be implemented to preserve the genetic diversity of endangered populations such that the controlled release of captive‐bred individuals into the wild may promote recovery. A common difficulty, however, is that programs are founded with limited wild broodstock, and inbreeding can become increasingly difficult to avoid with successive generations in captivity. Program managers must choose between maintaining the genetic purity of populations, at the risk of inbreeding depression, or interbreeding populations, at the risk of outbreeding depression. We evaluate these relative risks in a captive‐breeding program for 3 endangered populations of Atlantic salmon (Salmo salar). In each of 2 years, we released juvenile F 1 and F 2 interpopulation hybrids, backcrosses, as well as inbred and noninbred within‐population crosstypes into 9 wild streams. Juvenile size and survival was quantified in each year. Few crosstype effects were observed, but interestingly, the relative fitness consequences of inbreeding and outbreeding varied from year to year. Temporal variation in environmental quality might have driven some of these annual differences, by exacerbating the importance of maternal effects on juvenile fitness in a year of low environmental quality and by affecting the severity of inbreeding depression differently in different years. Nonetheless, inbreeding was more consistently associated with a negative effect on fitness, whereas the consequences of outbreeding were less predictable. Considering the challenges associated with a sound risk assessment in the wild and given that the effect of inbreeding on fitness is relatively predictable, we suggest that risk can be weighted more strongly in terms of the probable outcome of outbreeding. Factors such as genetic similarities between populations and the number of generations in isolation can sometimes be used to assess outbreeding risk, in lieu of experimentation. Evaluación del Riesgo de Depresión por Endogamia y Exogamia en un ... Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Conservation Biology 28 2 529 540 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Captive‐breeding programs can be implemented to preserve the genetic diversity of endangered populations such that the controlled release of captive‐bred individuals into the wild may promote recovery. A common difficulty, however, is that programs are founded with limited wild broodstock, and inbreeding can become increasingly difficult to avoid with successive generations in captivity. Program managers must choose between maintaining the genetic purity of populations, at the risk of inbreeding depression, or interbreeding populations, at the risk of outbreeding depression. We evaluate these relative risks in a captive‐breeding program for 3 endangered populations of Atlantic salmon (Salmo salar). In each of 2 years, we released juvenile F 1 and F 2 interpopulation hybrids, backcrosses, as well as inbred and noninbred within‐population crosstypes into 9 wild streams. Juvenile size and survival was quantified in each year. Few crosstype effects were observed, but interestingly, the relative fitness consequences of inbreeding and outbreeding varied from year to year. Temporal variation in environmental quality might have driven some of these annual differences, by exacerbating the importance of maternal effects on juvenile fitness in a year of low environmental quality and by affecting the severity of inbreeding depression differently in different years. Nonetheless, inbreeding was more consistently associated with a negative effect on fitness, whereas the consequences of outbreeding were less predictable. Considering the challenges associated with a sound risk assessment in the wild and given that the effect of inbreeding on fitness is relatively predictable, we suggest that risk can be weighted more strongly in terms of the probable outcome of outbreeding. Factors such as genetic similarities between populations and the number of generations in isolation can sometimes be used to assess outbreeding risk, in lieu of experimentation. Evaluación del Riesgo de Depresión por Endogamia y Exogamia en un ... |
author2 |
Killam Trust Memorial Scholarship NSERC CGS Scholarship NSERC Discovery grant NSERC Strategic Grant |
format |
Article in Journal/Newspaper |
author |
ROLLINSON, NJAL KEITH, DAVE M. HOUDE, AIMEE LEE S. DEBES, PAUL V. MCBRIDE, MEGHAN C. HUTCHINGS, JEFFREY A. |
spellingShingle |
ROLLINSON, NJAL KEITH, DAVE M. HOUDE, AIMEE LEE S. DEBES, PAUL V. MCBRIDE, MEGHAN C. HUTCHINGS, JEFFREY A. Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
author_facet |
ROLLINSON, NJAL KEITH, DAVE M. HOUDE, AIMEE LEE S. DEBES, PAUL V. MCBRIDE, MEGHAN C. HUTCHINGS, JEFFREY A. |
author_sort |
ROLLINSON, NJAL |
title |
Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
title_short |
Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
title_full |
Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
title_fullStr |
Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
title_full_unstemmed |
Risk Assessment of Inbreeding and Outbreeding Depression in a Captive‐Breeding Program |
title_sort |
risk assessment of inbreeding and outbreeding depression in a captive‐breeding program |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/cobi.12188 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fcobi.12188 http://onlinelibrary.wiley.com/wol1/doi/10.1111/cobi.12188/fullpdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Conservation Biology volume 28, issue 2, page 529-540 ISSN 0888-8892 1523-1739 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/cobi.12188 |
container_title |
Conservation Biology |
container_volume |
28 |
container_issue |
2 |
container_start_page |
529 |
op_container_end_page |
540 |
_version_ |
1810432724743225344 |