Literaturdatenbank
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Farley, S. M. (2004). Conservation genetics of the snapping turtle (elseya sp.): an assessment of genetic diversity and population structure. Unpublished thesis , University of Canberra, Canberra.
Added by: Sarina Wunderlich (18 Nov 2012 17:43:23 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: Farley2004 View all bibliographic details  |
Categories: General Keywords: Australien = Australia, Genetik = genetics, Habitat = habitat, Schildkröten = turtles + tortoises, Systematik = taxonomy Creators: Farley Publisher: University of Canberra (Canberra) |
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| Abstract |
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Elseya sp. is an undescribed species of freshwater turtle that is endemic to the Burnett, Mary and Fitzroy Rivers in Queensland. This species is highly vulnerable to disturbance associated with water infrastructure development due to its restricted distribution and specialised dietary, habitat and physiological requirements. Ecological and demographic data, in conjunction with genetic data can help managers to determine appropriate conservation management strategies that will allow sufficient opportunities for Elseya sp. to persist in these rivers. Genetic studies can contribute knowledge towards understanding the factors that may affect biodiversity, specifically in relation to the loss of genetic diversity and the implications that this could have on the persistence of species in their natural habitat. The maintenance of genetic diversity is important because it represents the evolutionary potential of a species (Frankham et al., 2002). This study aims to provide additional information at the population level that can be used to preserve local and regional variation within the three river systems that would otherwise be lost as a result of development. The analysis of five nuclear microsatellite loci was used to assess the genetic diversity and structure present among and within sample populations of Elseya sp. Analysis has indicated that the Fitzroy catchment contains the highest degree of genetic diversity, followed by the Burnett and Mary catchments. Limited genetic structure was detected within the Burnett catchment, with similar results obtained within the Mary catchment. In contrast, there was significant genetic structure detected within the Fitzroy catchment (p < 0.01). Among catchments there was significant genetic differentiation between the Fitzroy and the Burnett catchment (FST = 0.348, p < 0.01; RST = 0.075, p < 0.05) and the Fitzroy and the Mary catchment (FST = 0.302, p <0.01; RST = 0.052, p < 0.05). Less genetic differentiation was detected between the Burnett and Mary catchments (FST = 0.028, p < 0.01). Gene flow was limited between the Fitzroy catchment and the Burnett and Mary catchments, but was higher between the Burnett and Mary catchments. The results obtained from this study will provide a framework to assist in the development of management strategies that incorporate the conservation of genetic diversity.
Added by: Sarina Wunderlich |