Detecting prey from DNA in predator scats: a comparison with morphological analysis, using Arctocephalus seals fed a known diet

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Molecular identification methods of fish species: reassessment and possible applications (2009, background): “Casper et al. (2007) experimentally compared the utility of real-time PCR for identifying consumption of captive Arctocephalus seals fed mixed prey diets (one squid and two fish taxa) with the occurrence of hard part remains of prey in scats.”
Pyrosequencing faecal DNA to determine diet of little penguins: is what goes in what comes out? (2010, unknown): “This means prey DNA is detectable for at least 4 days after ingestion, considerably longer than the 48 h detection period for prey DNA observed in pinnipeds (Deagle et al. 2005; Casper et al. 2007).”
Methods of estimating marine mammal diets: A review of validation experiments and sources of bias and uncertainty (2012, methodology): “The ability to identify prey-specific DNA (e.g., Casper et al. 2007) has led to the development of a new method for estimating the diets of marine mammals.”