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Optimised PCR assays for detecting elusive waterfowl from environmental DNA

Honka Johanna; Kvist Laura; Olli Suvi; Laaksonen Toni; Aspi Jouni

Optimised PCR assays for detecting elusive waterfowl from environmental DNA

Honka Johanna
Kvist Laura
Olli Suvi
Laaksonen Toni
Aspi Jouni
Katso/Avaa
Ecology and Evolution - 2024 - Honka - Optimised PCR assays for.pdf (5.124Mb)
Lataukset: 

Wiley-Blackwell
doi:10.1002/ece3.11224
URI
https://onlinelibrary.wiley.com/doi/10.1002/ece3.11224
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2025082790540
Tiivistelmä
For many aquatic and semiaquatic mammal, amphibian and fish species, environmental DNA (eDNA) methods are employed to detect species distribution and to monitor their presence, but eDNA is much less employed for avian species. Here, we developed primers for the detection of true geese and swan species using eDNA and optimised a PCR protocol for eDNA. We selected taiga bean goose (Anser fabalis fabalis) as our focal (sub)species and sampled water from lakes, from which the presence of taiga bean goose was visually confirmed. To test, if taiga bean goose DNA could be detected among DNA of other goose species, we similarly sampled eDNA from a zoo pond housing several Anatidae species. We were able to detect taiga bean goose DNA in all but one of the tested lakes, including the zoo pond. The primers developed are not species-specific, but rather specific to the genus Anser, due to the close relatedness of Anser species, which prevented the development of species-specific primers and the use of, for example, quantitative PCR. We also developed eDNA primers for Branta species and Cygnus species and tested these primers using the same samples. Canada goose (B. canadensis) and barnacle goose (B. leucopsis) DNA were only detected in the zoo pond (in which they were present), as the sampled natural lakes fall outside the range of these species. We detected whooper swan (C. cygnus) DNA in three lakes and the zoo pond (in which the species was present). The eDNA method presented here provides a potential means to monitor elusive goose species and to study the co-occurrence of large waterfowl.
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