Literaturdatenbank
Literaturdatenbank |
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Benavides, E., Russello, M., Boyer, D., Wiese, R. J., Kajdacsi, B., & Marquez, L., et al. (2011). Lineage identification and genealogical relationships among captive galápagos tortoises. Zoo Biology, 30((early view)).
Added by: Sarina Wunderlich (25 Jun 2011 12:41:14 UTC) |
| Resource type: Journal Article DOI: 10.1002/zoo.20397 BibTeX citation key: Benavides2011 View all bibliographic details  |
Categories: General Keywords: Chelonoidis, Chelonoidis nigra, Genetik = genetics, Schildkröten = turtles + tortoises, Testudinidae Creators: Benavides, Boyer, Caccone, Garrick, Kajdacsi, Marquez, Russello, Wiese Collection: Zoo Biology |
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| Abstract |
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Testudinidae Geochelone nigra Genetic tools have become a critical complement to traditional approaches for meeting short- and long-term goals of ex situ conservation programs. The San Diego Zoo (SDZ) harbors a collection of wild-born and captive-born Galápagos giant tortoises (n = 22) of uncertain species designation and unknown genealogical relationships. Here, we used mitochondrial DNA haplotypic data and nuclear microsatellite genotypic data to identify the evolutionary lineage of wild-born and captive-born tortoises of unknown ancestry, to infer levels of relatedness among founders and captive-born tortoises, and assess putative pedigree relationships assigned by the SDZ studbook. Assignment tests revealed that 12 wild-born and five captive-born tortoises represent five different species from Isabela Island and one species from Santa Cruz Island, only five of which were consistent with current studbook designations. Three wild-born and one captive-born tortoise were of mixed ancestry. In addition, kinship analyses revealed two significant first-order relationship pairs between wild-born and captive-born tortoises, four second-order relationships (half-sibling) between wild-born and captive tortoises (full-sibs or parent-offspring), and one second-order relationship between two captive-born tortoises. Of particular note, we also reconstructed a first-order relationship between two wild-born individuals, violating the founder assumption. Overall, our results contribute to a worldwide effort in identifying genetically important Galápagos tortoises currently in captivity while revealing closely related founders, reconstructing genealogical relationships, and providing detailed management recommendations for the SDZ tortoises.
Added by: Sarina Wunderlich |