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Genetic rescue of an insular population of large mammals
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| Zeitschriftentitel: | Proceedings of the Royal Society B: Biological Sciences |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Proceedings of the Royal Society B: Biological Sciences, 273, 2006, 1593, S. 1491-1499 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
The Royal Society
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| Schlagwörter: |
| author_facet |
Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon |
|---|---|
| author |
Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon |
| spellingShingle |
Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon Proceedings of the Royal Society B: Biological Sciences Genetic rescue of an insular population of large mammals General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine |
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hogg, john t |
| spelling |
Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon 0962-8452 1471-2954 The Royal Society General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine http://dx.doi.org/10.1098/rspb.2006.3477 <jats:p>Natural populations worldwide are increasingly fragmented by habitat loss. Isolation at small population size is thought to reduce individual and population fitness via inbreeding depression. However, little is known about the time-scale over which adverse genetic effects may develop in natural populations or the number and types of traits likely to be affected. The benefits of restoring gene flow to isolates are therefore also largely unknown. In contrast, the potential costs of migration (e.g. disease spread) are readily apparent. Management for ecological connectivity has therefore been controversial and sometimes avoided. Using pedigree and life-history data collected during 25 years of study, we evaluated genetic decline and rescue in a population of bighorn sheep founded by 12 individuals in 1922 and isolated at an average size of 42 animals for 10–12 generations. Immigration was restored experimentally, beginning in 1985. We detected marked improvements in reproduction, survival and five fitness-related traits among descendants of the 15 recent migrants. Trait values were increased by 23–257% in maximally outbred individuals. This is the first demonstration, to our knowledge, of increased male and female fitness attributable to outbreeding realized in a fully competitive natural setting. Our findings suggest that genetic principles deserve broader recognition as practical management tools with near-term consequences for large-mammal conservation.</jats:p> Genetic rescue of an insular population of large mammals Proceedings of the Royal Society B: Biological Sciences |
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Genetic rescue of an insular population of large mammals |
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Genetic rescue of an insular population of large mammals |
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Genetic rescue of an insular population of large mammals |
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Genetic rescue of an insular population of large mammals |
| title_short |
Genetic rescue of an insular population of large mammals |
| title_sort |
genetic rescue of an insular population of large mammals |
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General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine |
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http://dx.doi.org/10.1098/rspb.2006.3477 |
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2006 |
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1491-1499 |
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<jats:p>Natural populations worldwide are increasingly fragmented by habitat loss. Isolation at small population size is thought to reduce individual and population fitness via inbreeding depression. However, little is known about the time-scale over which adverse genetic effects may develop in natural populations or the number and types of traits likely to be affected. The benefits of restoring gene flow to isolates are therefore also largely unknown. In contrast, the potential costs of migration (e.g. disease spread) are readily apparent. Management for ecological connectivity has therefore been controversial and sometimes avoided. Using pedigree and life-history data collected during 25 years of study, we evaluated genetic decline and rescue in a population of bighorn sheep founded by 12 individuals in 1922 and isolated at an average size of 42 animals for 10–12 generations. Immigration was restored experimentally, beginning in 1985. We detected marked improvements in reproduction, survival and five fitness-related traits among descendants of the 15 recent migrants. Trait values were increased by 23–257% in maximally outbred individuals. This is the first demonstration, to our knowledge, of increased male and female fitness attributable to outbreeding realized in a fully competitive natural setting. Our findings suggest that genetic principles deserve broader recognition as practical management tools with near-term consequences for large-mammal conservation.</jats:p> |
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| author | Hogg, John T, Forbes, Stephen H, Steele, Brian M, Luikart, Gordon |
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| description | <jats:p>Natural populations worldwide are increasingly fragmented by habitat loss. Isolation at small population size is thought to reduce individual and population fitness via inbreeding depression. However, little is known about the time-scale over which adverse genetic effects may develop in natural populations or the number and types of traits likely to be affected. The benefits of restoring gene flow to isolates are therefore also largely unknown. In contrast, the potential costs of migration (e.g. disease spread) are readily apparent. Management for ecological connectivity has therefore been controversial and sometimes avoided. Using pedigree and life-history data collected during 25 years of study, we evaluated genetic decline and rescue in a population of bighorn sheep founded by 12 individuals in 1922 and isolated at an average size of 42 animals for 10–12 generations. Immigration was restored experimentally, beginning in 1985. We detected marked improvements in reproduction, survival and five fitness-related traits among descendants of the 15 recent migrants. Trait values were increased by 23–257% in maximally outbred individuals. This is the first demonstration, to our knowledge, of increased male and female fitness attributable to outbreeding realized in a fully competitive natural setting. Our findings suggest that genetic principles deserve broader recognition as practical management tools with near-term consequences for large-mammal conservation.</jats:p> |
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| spelling | Hogg, John T Forbes, Stephen H Steele, Brian M Luikart, Gordon 0962-8452 1471-2954 The Royal Society General Agricultural and Biological Sciences General Environmental Science General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine http://dx.doi.org/10.1098/rspb.2006.3477 <jats:p>Natural populations worldwide are increasingly fragmented by habitat loss. Isolation at small population size is thought to reduce individual and population fitness via inbreeding depression. However, little is known about the time-scale over which adverse genetic effects may develop in natural populations or the number and types of traits likely to be affected. The benefits of restoring gene flow to isolates are therefore also largely unknown. In contrast, the potential costs of migration (e.g. disease spread) are readily apparent. Management for ecological connectivity has therefore been controversial and sometimes avoided. Using pedigree and life-history data collected during 25 years of study, we evaluated genetic decline and rescue in a population of bighorn sheep founded by 12 individuals in 1922 and isolated at an average size of 42 animals for 10–12 generations. Immigration was restored experimentally, beginning in 1985. We detected marked improvements in reproduction, survival and five fitness-related traits among descendants of the 15 recent migrants. Trait values were increased by 23–257% in maximally outbred individuals. This is the first demonstration, to our knowledge, of increased male and female fitness attributable to outbreeding realized in a fully competitive natural setting. Our findings suggest that genetic principles deserve broader recognition as practical management tools with near-term consequences for large-mammal conservation.</jats:p> Genetic rescue of an insular population of large mammals Proceedings of the Royal Society B: Biological Sciences |
| spellingShingle | Hogg, John T, Forbes, Stephen H, Steele, Brian M, Luikart, Gordon, Proceedings of the Royal Society B: Biological Sciences, Genetic rescue of an insular population of large mammals, General Agricultural and Biological Sciences, General Environmental Science, General Immunology and Microbiology, General Biochemistry, Genetics and Molecular Biology, General Medicine |
| title | Genetic rescue of an insular population of large mammals |
| title_full | Genetic rescue of an insular population of large mammals |
| title_fullStr | Genetic rescue of an insular population of large mammals |
| title_full_unstemmed | Genetic rescue of an insular population of large mammals |
| title_short | Genetic rescue of an insular population of large mammals |
| title_sort | genetic rescue of an insular population of large mammals |
| title_unstemmed | Genetic rescue of an insular population of large mammals |
| topic | General Agricultural and Biological Sciences, General Environmental Science, General Immunology and Microbiology, General Biochemistry, Genetics and Molecular Biology, General Medicine |
| url | http://dx.doi.org/10.1098/rspb.2006.3477 |