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Research data keyboard_double_arrow_right Dataset 2017Embargo end date: 12 Sep 2017 EnglishPublisher:Dryad Funded by:ANR | GenoSpace, ARC | Genomics for persistence ..., ARC | ARC Future Fellowships - ... +1 projectsANR| GenoSpace ,ARC| Genomics for persistence of Australian freshwater fish ,ARC| ARC Future Fellowships - Grant ID: FT130101068 ,EC| AGREENSKILLSPLUSAuthors: Coleman, Rhys A.; Gauffre, Bertrand; Pavlova, Alexandra; Beheregaray, Luciano B.; +6 AuthorsColeman, Rhys A.; Gauffre, Bertrand; Pavlova, Alexandra; Beheregaray, Luciano B.; Kearns, Joanne; Lyon, Jarod; Sasaki, Minami; Leblois, Raphael; Sgro, Carla; Sunnucks, Paul;doi: 10.5061/dryad.hn050
Habitat loss and fragmentation often result in small, isolated populations vulnerable to environmental disturbance and loss of genetic diversity. Low genetic diversity can increase extinction risk of small populations by elevating inbreeding and inbreeding depression, and reducing adaptive potential. Due to their linear nature and extensive use by humans, freshwater ecosystems are especially vulnerable to habitat loss and fragmentation. Although the effects of fragmentation on genetic structure have been extensively studied in migratory fish, they are less understood in low-mobility species. We estimated impacts of instream barriers on genetic structure and diversity of the low-mobility river blackfish (Gadopsis marmoratus) within five streams separated by weirs or dams constructed 45–120 years ago. We found evidence of small-scale (<13 km) genetic structure within reaches unimpeded by barriers, as expected for a fish with low mobility. Genetic diversity was lower above barriers in small streams only, regardless of barrier age. In particular, one isolated population showed evidence of a recent bottleneck and inbreeding. Differentiation above and below the barrier was greatest (FST =0.13) in this stream, but in other streams did not differ from background levels. Spatially explicit simulations suggest that short-term barrier effects would not be detected with our dataset unless effective population sizes were very small (<100). Our study highlights that, in structured populations, the ability to detect short-term genetic effects from barriers is reduced and requires more genetic markers compared to panmictic populations. We also demonstrate the importance of accounting for natural population genetic structure in fragmentation studies. Coleman et al artificial barriers prevent recovery of a low mobility fish raw dataRaw microsatellite data using 11 loci and 366 fin tissue samples collected from 28 southern river blackfish populations across five streams in the Yarra River catchment near Melbourne, Victoria, Australia. Individuals were sampled from 2–3 sites above and 2–3 sites below artificial barriers in each stream.Coleman et al artificial barriers prevent recovery of a low mobility fish site locationsLocation of survey sites where southern river blackfish tissue samples were collected from the Yarra River catchment near Melbourne, Victoria, Australia.Coleman et al artificial barriers prevent recovery of a low mobility fish 8 loci no less than 60mmRaw microsatellite data for the 8 polymorphic loci only and juveniles less than 60mm removed.
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Research data keyboard_double_arrow_right Dataset 2017Embargo end date: 12 Sep 2017 EnglishPublisher:Dryad Funded by:ANR | GenoSpace, ARC | Genomics for persistence ..., ARC | ARC Future Fellowships - ... +1 projectsANR| GenoSpace ,ARC| Genomics for persistence of Australian freshwater fish ,ARC| ARC Future Fellowships - Grant ID: FT130101068 ,EC| AGREENSKILLSPLUSAuthors: Coleman, Rhys A.; Gauffre, Bertrand; Pavlova, Alexandra; Beheregaray, Luciano B.; +6 AuthorsColeman, Rhys A.; Gauffre, Bertrand; Pavlova, Alexandra; Beheregaray, Luciano B.; Kearns, Joanne; Lyon, Jarod; Sasaki, Minami; Leblois, Raphael; Sgro, Carla; Sunnucks, Paul;doi: 10.5061/dryad.hn050
Habitat loss and fragmentation often result in small, isolated populations vulnerable to environmental disturbance and loss of genetic diversity. Low genetic diversity can increase extinction risk of small populations by elevating inbreeding and inbreeding depression, and reducing adaptive potential. Due to their linear nature and extensive use by humans, freshwater ecosystems are especially vulnerable to habitat loss and fragmentation. Although the effects of fragmentation on genetic structure have been extensively studied in migratory fish, they are less understood in low-mobility species. We estimated impacts of instream barriers on genetic structure and diversity of the low-mobility river blackfish (Gadopsis marmoratus) within five streams separated by weirs or dams constructed 45–120 years ago. We found evidence of small-scale (<13 km) genetic structure within reaches unimpeded by barriers, as expected for a fish with low mobility. Genetic diversity was lower above barriers in small streams only, regardless of barrier age. In particular, one isolated population showed evidence of a recent bottleneck and inbreeding. Differentiation above and below the barrier was greatest (FST =0.13) in this stream, but in other streams did not differ from background levels. Spatially explicit simulations suggest that short-term barrier effects would not be detected with our dataset unless effective population sizes were very small (<100). Our study highlights that, in structured populations, the ability to detect short-term genetic effects from barriers is reduced and requires more genetic markers compared to panmictic populations. We also demonstrate the importance of accounting for natural population genetic structure in fragmentation studies. Coleman et al artificial barriers prevent recovery of a low mobility fish raw dataRaw microsatellite data using 11 loci and 366 fin tissue samples collected from 28 southern river blackfish populations across five streams in the Yarra River catchment near Melbourne, Victoria, Australia. Individuals were sampled from 2–3 sites above and 2–3 sites below artificial barriers in each stream.Coleman et al artificial barriers prevent recovery of a low mobility fish site locationsLocation of survey sites where southern river blackfish tissue samples were collected from the Yarra River catchment near Melbourne, Victoria, Australia.Coleman et al artificial barriers prevent recovery of a low mobility fish 8 loci no less than 60mmRaw microsatellite data for the 8 polymorphic loci only and juveniles less than 60mm removed.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5061/dryad.hn050&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 6visibility views 6 download downloads 1 Powered bymore_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5061/dryad.hn050&type=result"></script>'); --> </script>
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