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A single mini-barcode test to screen for Australian mammalian predators from environmental samples
Elodie Modave1, Anna J MacDonald1, Stephen D Sarre1
1Institute for Applied Ecology, University of Canberra, ACT, 2601, Canberra, Australia.
Gigascience
|August 17, 2017
Summary
Researchers developed a new DNA mini-barcode from mitochondrial genes to identify Australian predator species from scat. This cost-effective, non-invasive tool accurately detects native and introduced species using trace DNA.
Area of Science:
- Wildlife genetics
- Molecular ecology
- Conservation biology
Background:
- Species identification from trace DNA, like predator scats, aids wildlife management.
- Degraded DNA in scats limits traditional DNA barcoding, necessitating shorter markers.
- Mitochondrial DNA offers high copy numbers and species-level resolution for trace samples.
Purpose of the Study:
- To develop and validate a diagnostic mini-barcode for identifying Australian mammalian predators from scat.
- To address limitations of degraded DNA in non-invasive wildlife monitoring.
Main Methods:
- Developed a 178 bp mini-barcode targeting the 12S ribosomal RNA mitochondrial gene.
- Tested primer sensitivity and specificity for discriminating between predator species.
- Applied the method to trace DNA samples from predator scats.
Main Results:
- Successfully discriminated between quolls, cats, dogs, foxes, and devils using the mini-barcode.
- Demonstrated accurate detection and identification from trace DNA samples.
- The method identified all 8 medium-large mammal predators in Australia.
Conclusions:
- The developed mini-barcode is a sensitive, specific, and efficient tool for predator identification from scat.
- This approach offers a cost-effective, non-invasive solution for wildlife management and monitoring.
- The method has potential for broad applicability in other regions with modifications.
