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A 'feather-trap' for collecting DNA samples from birds.
Golo Maurer1, Nadeena Beck, Michael C Double
1School of Botany and Zoology, Australian National University, Canberra, ACT 0200, Australia Centre for Ornitholgy, University of Birmingham, B15 2TT, United Kingdom Department of the Environment, Water, Heritage and the Arts, 203 Channel Highway, Kingston, Tas. 7050, Australia Australian Antarctic Division, 203 Channel Highway, Kingston, Tas. 7050, Australia.
A novel feather-trap method offers a minimally invasive way to collect bird DNA. This technique successfully gathered feathers for genetic analysis without harming sensitive species, providing a viable alternative to blood sampling.
Area of Science:
- Ornithology
- Molecular Ecology
- Conservation Biology
Background:
- Traditional bird genetic studies rely on blood DNA extraction.
- Obtaining blood samples can be challenging for sensitive, elusive, or conservation-concern species.
Purpose of the Study:
- To describe and evaluate a novel, minimally invasive feather-trap method for avian DNA collection.
- To assess the feasibility of using feathers for genetic analysis in species where blood sampling is difficult.
Main Methods:
- A simple feather-trap using double-sided adhesive tape was deployed near Australian pheasant coucal nests.
- Feather samples were collected over 2-5 days and DNA extraction was performed.
- Genotyping at five microsatellite loci was conducted for parentage analysis.
Main Results:
- The feather-trap did not cause nest abandonment or affect feeding rates in coucals.
- An average of 4.2 feathers were collected per trap, with DNA successfully extracted from 71.4% of samples.
- Extracted DNA was sufficient for reliable individual genotyping at multiple microsatellite loci.
Conclusions:
- The feather-trap provides a simple, inexpensive, and effective alternative for avian DNA collection, especially for difficult-to-sample species.
- This method minimizes handling stress and potential harm to birds.
- Feather DNA analysis using this trap is suitable for parentage analysis and potentially other applications like stable-isotope analysis.
