• Publications
  • Influence
Molecular scatology as a tool to study diet: analysis of prey DNA in scats from captive Steller sea lions
TLDR
A captive feeding trial to test whether prey DNA could be reliably detected in scat samples from Steller sea lions highlighted an approach that can accurately identify prey species and is not dependent on prey hard parts surviving digestion. Expand
Species and size differences in the digestion of otoliths and beaks: Implications for estimates of pinniped diet composition
TLDR
Estimates of prey size and diet composition require otoliths from faeces to be graded and more complex correction factors applied and the application of species, size, and grade-specific correction factors progressively improved reconstructed estimates of prey biomass fed. Expand
Molecular scatology: the use of molecular genetic analysis to assign species, sex and individual identity to seal faeces
TLDR
A protocol for obtaining DNA from seal scat (faecal) samples which can be used in polymerase chain reactions to amplify both nuclear and mitochondrial DNA can provide a method of identifying the species, sex and individual identity of the seal, from a particular scat sample. Expand
Distribution and activity of male harbour seals during the mating season
TLDR
This study supports previous suggestions that vocalizations and diving displays may be associated with male mating behaviour, but suggests that males may display over a much wider geographical area than was previously recognized. Expand
Estimating harbour seal abundance and status in an estuarine habitat in north-east Scotland
1. Harbour seals are the most widespread of pinniped species, coming ashore onto a variety of different habitats to rest, moult and breed. Estimates of their abundance and status rely on counts ofExpand
Seasonal and between-year variations in the diet of harbour seals in the Moray Firth, Scotland
TLDR
The extent of between-year and seasonal variations in the diet of harbour seals from the Moray Firth, Scotland, between 1989 and 1992 was examined. Expand
Quantitative analysis of prey DNA in pinniped faeces: potential to estimate diet composition?
TLDR
There are prey-specific biases in DNA survival during digestion during digestion in pinniped faeces, but the biases may be less than those commonly observed in conventional diet studies. Expand
Development and application of DNA techniques for validating and improving pinniped diet estimates.
TLDR
Combining DNA and hard-part identification will effectively alleviate certain predicted biases and will ultimately enhance measures of diet richness, fisheries interactions (especially salmon-related ones), and the ecological role of pinnipeds and other marine predators, to the benefit of marine wildlife conservationists and fisheries managers. Expand
Comparative distribution, movements and diet of harbour and grey seals from the Moray Firth, N.E. Scotland
TLDR
The results suggest that Moray Firth harbour seals can be considered as a relatively discrete population, with clear links between breeding, feeding and resting areas, and little exchange of adults between this and adjacent breeding areas in Orkney and the Tay Estuary. Expand
QUANTIFYING ERRORS ASSOCIATED WITH USING PREY SKELETAL STRUCTURES FROM FECAL SAMPLES TO DETERMINE THE DIET OF STELLER'S SEA LION (EUMETOPIAS JUBATUS)
TLDR
Differences between species were reduced when recovery was calculated on a per scat basis rather than over multiple scats, and there were significant differences in the likelihood that bones would be recovered from the series of scats produced following a meal. Expand
...
1
2
3
4
5
...