Reproductive and genetic consequences of founding isolated lion populations
Identifieur interne : 001D08 ( Main/Exploration ); précédent : 001D07; suivant : 001D09Reproductive and genetic consequences of founding isolated lion populations
Auteurs : D. E. Wildt [États-Unis] ; M. Bush [États-Unis] ; K. L. Goodrowe [États-Unis] ; C. Packer ; A. E. Pusey ; J. L. Brown ; P. Joslin ; S. J. O'BrienSource :
- Nature [ 0028-0836 ] ; 1987-09-24.
Abstract
Species survival is critically dependent on reproductive performance, a complex physiological process under rigorous genetic control. Classical studies of inbreeding in laboratory animals and livestock have shown that increased homozygosity can adversely affect spermatogenesis, ovulation and perinatal mortality and morbidity13. For wild populations, the consequences of inbreeding depression have not been examined intensively, although our recent studies of the African cheetah revealed a striking degree of genetic uniformity4,5 combined with an extremely high incidence of structurally abnormal spermatozoa (>70%) in captive6 as well as free-ranging7 males. In this study, we report definitive evidence that the reproductive function of free-ranging mammals can be impaired as a result of demographic contraction followed by inbreeding. In an examination of three distinct lion populations (two from the Serengeti ecosystem in East Africa and a third descended from lions in the Gir Forest of western India), a direct correlation was observed between genetic variability and two physiological traits, incidence of abnormal sperm and circulating testosterone, a critical hormone for spermatogenesis.
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DOI: 10.1038/329328a0
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Brown</name></author><author><name sortKey="Joslin, P" sort="Joslin, P" uniqKey="Joslin P" first="P." last="Joslin">P. Joslin</name></author><author><name sortKey="O Brien, S J" sort="O Brien, S J" uniqKey="O Brien S" first="S. J." last="O'Brien">S. J. 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Bush</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>National Zoological Park, Smithsonian Institution, Washington, District of Columbia 20008, USADepartment of Ecology and Behavioral Biology, University of Minnesota, Minneapolis, Minnesota 55455, USADepartment of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USAChicago Zoological Park, Brookfield, Illinois 60513, USASection of Genetics, Laboratory of Viral Carcinogenesis, National Cancer Institute, Frederick, Maryland 21701</wicri:regionArea><wicri:noRegion>Maryland 21701</wicri:noRegion></affiliation></author><author><name sortKey="Goodrowe, K L" sort="Goodrowe, K L" uniqKey="Goodrowe K" first="K. L." last="Goodrowe">K. L. Goodrowe</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>National Zoological Park, Smithsonian Institution, Washington, District of Columbia 20008, USADepartment of Ecology and Behavioral Biology, University of Minnesota, Minneapolis, Minnesota 55455, USADepartment of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USAChicago Zoological Park, Brookfield, Illinois 60513, USASection of Genetics, Laboratory of Viral Carcinogenesis, National Cancer Institute, Frederick, Maryland 21701</wicri:regionArea><wicri:noRegion>Maryland 21701</wicri:noRegion></affiliation></author><author><name sortKey="Packer, C" sort="Packer, C" uniqKey="Packer C" first="C." last="Packer">C. Packer</name></author><author><name sortKey="Pusey, A E" sort="Pusey, A E" uniqKey="Pusey A" first="A. E." last="Pusey">A. E. Pusey</name></author><author><name sortKey="Brown, J L" sort="Brown, J L" uniqKey="Brown J" first="J. L." last="Brown">J. L. Brown</name></author><author><name sortKey="Joslin, P" sort="Joslin, P" uniqKey="Joslin P" first="P." last="Joslin">P. Joslin</name></author><author><name sortKey="O Brien, S J" sort="O Brien, S J" uniqKey="O Brien S" first="S. J." last="O'Brien">S. J. O'Brien</name></author></analytic><monogr></monogr><series><title level="j" type="main">Nature</title><imprint><publisher>Nature Publishing Group</publisher><date when="1987-09-24">1987-09-24</date><biblScope unit="vol">329</biblScope><biblScope unit="issue">6137</biblScope><biblScope unit="page" from="328">328</biblScope><biblScope unit="page" to="331">331</biblScope><date type="Copyright" when="1987">1987</date></imprint><idno type="ISSN">0028-0836</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0028-0836</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">Species survival is critically dependent on reproductive performance, a complex physiological process under rigorous genetic control. Classical studies of inbreeding in laboratory animals and livestock have shown that increased homozygosity can adversely affect spermatogenesis, ovulation and perinatal mortality and morbidity13. For wild populations, the consequences of inbreeding depression have not been examined intensively, although our recent studies of the African cheetah revealed a striking degree of genetic uniformity4,5 combined with an extremely high incidence of structurally abnormal spermatozoa (>70%) in captive6 as well as free-ranging7 males. In this study, we report definitive evidence that the reproductive function of free-ranging mammals can be impaired as a result of demographic contraction followed by inbreeding. In an examination of three distinct lion populations (two from the Serengeti ecosystem in East Africa and a third descended from lions in the Gir Forest of western India), a direct correlation was observed between genetic variability and two physiological traits, incidence of abnormal sperm and circulating testosterone, a critical hormone for spermatogenesis.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Brown, J L" sort="Brown, J L" uniqKey="Brown J" first="J. L." last="Brown">J. L. Brown</name><name sortKey="Joslin, P" sort="Joslin, P" uniqKey="Joslin P" first="P." last="Joslin">P. Joslin</name><name sortKey="O Brien, S J" sort="O Brien, S J" uniqKey="O Brien S" first="S. J." last="O'Brien">S. J. O'Brien</name><name sortKey="Packer, C" sort="Packer, C" uniqKey="Packer C" first="C." last="Packer">C. Packer</name><name sortKey="Pusey, A E" sort="Pusey, A E" uniqKey="Pusey A" first="A. E." last="Pusey">A. E. Pusey</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Wildt, D E" sort="Wildt, D E" uniqKey="Wildt D" first="D. E." last="Wildt">D. E. Wildt</name></noRegion><name sortKey="Bush, M" sort="Bush, M" uniqKey="Bush M" first="M." last="Bush">M. Bush</name><name sortKey="Goodrowe, K L" sort="Goodrowe, K L" uniqKey="Goodrowe K" first="K. L." last="Goodrowe">K. L. Goodrowe</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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