期刊
JOURNAL OF FISH BIOLOGY
卷 73, 期 6, 页码 1473-1477出版社
WILEY
DOI: 10.1111/j.1095-8649.2008.02018.x
关键词
automixis; Carcharhinidae; diversity; evolution; genetic management
资金
- Roe Foundation
- Pew Institute for Ocean Science
- Florida Sea Grant Program
- Hai Stiftung
Genetic evidence is provided for parthenogenesis in a large-bodied shark, the blacktip Carcharhinus limbatus, from the speciose and commercially important family Carcharhinidae, the first verified case of asexual development in this lineage and only the second for any chondrichthyan. The parthenogenetic embryo exhibited elevated homozygosity relative to its mother, indicating that automictic parthenogenesis is the most likely mechanism. Although this finding shows that parthenogenesis is more common and widespread in sharks than previously realized and supports the early existence of parthenogenetic abilities in vertebrates, the adaptive significance of automixis in these ancient fishes remains unclear. (C) 2008 The Authors Journal compilation (C) 2008 The Fisheries Society of the British Isles
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