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Published (Version of Record)CC BY V4.0, Open Access
Journal article
Genetic bottlenecks in Pristis sawfishes in northern Australian waters
Endangered Species Research, Vol.32, pp.363-372
2017
Abstract
Northern Australia has been identified as the last stronghold for the dwarf sawfish Pristis clavata, green sawfish P. zijsron, and largetooth sawfish P. pristis, making these populations key in global conservation efforts for each species. This research assesses the levels of genetic diversity in these 3 sawfishes in Australian waters, testing for the presence of population bottlenecks using data at microsatellite loci. Levels of observed heterozygosity in each species from the west coast of Australia and the north-eastern Gulf of Carpentaria were generally high. M ratio tests suggest that assemblages of P. zijsron and P. pristis on the west coast and P. clavata and P. zijsron in the Gulf of Carpentaria may have experienced population bottlenecks. The bottlenecks are especially pronounced in P. zijsron populations and in P. clavata from the Gulf of Carpentaria. Demographic analyses, based on mtDNA data, indicate relatively recent (evolutionarily) range expansions in Pristis sawfishes in northern Australian waters, which could account for the population bottlenecks. A more recent range expansion in each of P. clavata and P. zijsron, as evidenced by more recent population divergence and more recent/higher rates of historic maternal gene flow, could account for the more pronounced bottlenecks in these species when compared to P. pristis. Given that Pristis sawfishes in Australian waters have experienced population bottlenecks, whether they be historic, contemporary or both, the preservation of remaining genetic diversity should be a high conservation priority.
Details
- Title
- Genetic bottlenecks in Pristis sawfishes in northern Australian waters
- Authors/Creators
- N.M. Phillips (Author/Creator)A. Fearing (Author/Creator)D.L. Morgan (Author/Creator)
- Publication Details
- Endangered Species Research, Vol.32, pp.363-372
- Publisher
- Inter-Research Science Center
- Identifiers
- 991005541198807891
- Copyright
- © 2017 Inter-Research
- Murdoch Affiliation
- School of Veterinary and Life Sciences; Centre for Fish and Fisheries Research
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.64 Phylogenetics & Genomics
- 3.64.71 Genetic Diversity
- Web Of Science research areas
- Biodiversity Conservation
- ESI research areas
- Environment/Ecology