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Scaling laws of marine predator search behaviour
Simulations show that predators have higher encounter rates when adopting Lévy-type foraging in natural-like prey fields compared with purely random landscapes, consistent with the hypothesis that observed search patterns are adapted to observed statistical patterns of the landscape.
The Diving Behaviour of Adult Male and Female Southern Elephant Seals, Mirounga leonina (Pinnipedia : Phocidae)
The diving behaviour of southern elephant seals is related to the possible prey they exploit in the Southern Ocean.
Molecular scatology as a tool to study diet: analysis of prey DNA in scats from captive Steller sea lions
- B. Deagle, D. Tollit, S. Jarman, M. Hindell, A. Trites, N. Gales
- Environmental ScienceMolecular ecology
- 1 May 2005
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.
Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya
Antarctic Bottom Water fills much of the global abyssal ocean, and is known to form in three main sites in the Southern Ocean. Data from instrumented elephant seals and moorings suggest an additional…
Studying Seabird Diet through Genetic Analysis of Faeces: A Case Study on Macaroni Penguins (Eudyptes chrysolophus)
The ability of the DNA-based approach to detect temporal variation in the diet of macaroni penguins indicates this non-invasive method will be generally useful for monitoring population-level dietary trends in seabirds.
Loyalty pays: potential life history consequences of fidelity to marine foraging regions by southern elephant seals
Variations in behavior and condition of a Southern Ocean top predator in relation to in situ oceanographic conditions
- M. Biuw, L. Boehme, M. Fedak
- Environmental ScienceProceedings of the National Academy of Sciences
- 21 August 2007
Improved body condition of seals in the Atlantic sector was associated with Circumpolar Deep Water upwelling regions within the Antarcticcircumpolar Current, whereas High-Salinity Shelf Waters or temperature/salinity gradients under winter pack ice were important in the Indian and Pacific sectors.
Population status, trends and a re-examination of the hypotheses explaining the recent declines of the southern elephant seal Mirounga leonina
An analysis of the relationship between log variance and log abundance for populations of southern and northern elephant seals suggests that interspecific competition is not a significant factor in the decline of the southern elephant seal.
Influence of maternal mass and condition on energy transfer in Weddell seals.
- Kathryn E. Wheatley, C. Bradshaw, L. S. Davis, R. Harcourt, M. Hindell
- Environmental ScienceThe Journal of animal ecology
- 1 May 2006
It appears that for Weddell seals the consequences of environmentally induced variation in food availability are manifested in differences in maternal mass and expenditure during lactation, which translate to changes in pup mass and condition at weaning with potential consequences for future survival and recruitment.