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Responses of Antarctic pack-ice seals to environmental change and increasing krill fishing" (2012). Keywords: Antarctic pack-ice seals Climate change Fisheries management Habitat change Krill Uncertainty a b s t r a c t The compound effects of changing habitats, ecosystem interactions, and fishing practices have implications for the management of Antarctic(More)
This is the first study that has used satellite telemetry to assess the spatial behaviour of adult leopard seals. Satellite tags on 11 leopard seals transmitted between 29 days and 282 days. Swim speeds, distances swum per day and distances from tagging site were significantly different among individuals and seasons. Swim speeds ranged from 0.004 km/h to(More)
Data on the timing of pupping by the three species of phocid that breed on the Antarctic pack-ice (crabeater, Ross and leopard seals) are limited. Better information would improve our understanding of these species' population and reproductive ecologies, and could facilitate planning and design of population surveys. Observations of the presence or absence(More)
After birth, mammals acquire a community of bacteria in their gastro-intestinal tract, which harvests energy and provides nutrients for the host. Comparative studies of numerous terrestrial mammal hosts have identified host phylogeny, diet and gut morphology as primary drivers of the gut bacterial community composition. To date, marine mammals have been(More)
The diet of male and female leopard seals (Hydrurga leptonyx) was investigated in Prydz Bay, Eastern Antarctica. A total of 70 scats, 1 regurgitate and 3 stomach contents were collected, during the austral summer, between November 1999 and March 2002. Eight prey species were identified, including birds, mammals, fish and invertebrates. Adelie penguins(More)
We demonstrate that the exhaled breath condensate, or 'blow', from marine mammals can be used to examine respiratory associated microbial communities using non-invasive sampling methods. Blow samples from two species of bottlenose dolphin, Tursiops truncatus and T. aduncus, along with hybrid offspring, were examined using molecular microbial ecology(More)
The gut microbiota of mammals underpins the metabolic capacity and health of the host. Our understanding of what influences the composition of this community has been limited primarily to evidence from captive and terrestrial mammals. Therefore, the gut microbiota of southern elephant seals, Mirounga leonina, and leopard seals, Hydrurga leptonyx, inhabiting(More)
A rapid, accurate and reproducible assay utilising high performance liquid chromatography-mass spectrometry (LC-MS) has been developed and validated for determining testosterone concentrations in saliva and blow of bottlenose dolphins. Sample preparation used solid phase extraction with specific preconditioning of cartridges. Analytes were eluted with 100%(More)
Toneburst-evoked auditory brainstem responses (ABRs) were recorded in a captive subadult male leopard seal. Three frequencies from 1 to 4 kHz were tested at sound levels from 68 to 122 dB peak equivalent sound pressure level (peSPL). Results illustrate brainstem activity within the 1-4 kHz range, with better hearing sensitivity at 4 kHz. As is seen in human(More)