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Distribution and diving behaviour of harp seals (Pagophilus groenlandicus) from the Greenland Sea stock
Divers of tagged seals spent a considerable proportion of their time in open water, their distribution largely overlapping with that of capelin, and dives were significantly deeper in the day and in winter than at night and in summer. Expand
Seasonal distribution and dive behaviour of harp seals (Pagophilus groenlandicus) of the White Sea–Barents Sea stock
Data from tagged harp seals and satellite-linked dive recorders provide a baseline for the evaluation of the effects of future climatic change in the rich Barents Sea ecosystem. Expand
Depressed metabolism and low protein catabolism in fasting grey seal pups.
It is concluded that a rapid depression of basal metabolic rate and extensive blubber catabolism enable grey seal pups to endure prolonged periods of fasting without any apparent signs of discomfort or stress. Expand
Individual Variation in Field Metabolic Rate of Kittiwakes (Rissa tridactyla) during the Chick‐Rearing Period
- M. Fyhn, G. Gabrielsen, E. Nordøy, B. Moe, I. Langseth, C. Bech
- Chemistry, Medicine
- Physiological and Biochemical Zoology
- 1 May 2001
The increase in FMR and simultaneous decrease in BMR caused a 40% increase in metabolic intensity (FMR), which indicates that the mates adjust their energy expenditure within a relatively constant FMR determined by the energy needs of the chicks. Expand
Metabolic Adaptations to Fasting in Harp Seal Pups
It is concluded that about 9% of the energy expended by harp sealpups between days 1 and 3 of the postweaning fast, and less than 4% after day 3, is derived from body protein, the major part of theEnergy being derived from catabolism of fat deposits in the blubber layer and, to some extent, in the core. Expand
Ross seal (Ommatophoca rossii) annual distribution, diving behaviour, breeding and moulting, off Queen Maud Land, Antarctica
Six out of ten adult Ross seals that were tagged with Argos satellite-linked dive recorders off Queen Maud Land, just after the moult in February, provided data on location and diving activity throughout a year, consistent with feeding on mid-water fish, like Pleurogramma antarcticum, squid, and to some extent krill, when in the pack-ice. Expand
Distribution and diving behaviour of crabeater seals (Lobodon carcinophagus) off Queen Maud Land
The notion that crabeater seals predominantly feed on krill in Antarctic pack ice, even when winter returns to the waters off Queen Maud Land, is supported. Expand
Energy sources in fasting grey seal pups evaluated with computed tomography.
It was calculated that approximately 94% of the energy expended by grey seal pups during the first 4 wk of the postweaning fast is derived from their subcutaneous deposits of fat. Expand
Glucose and ketone body turnover in fasting grey seal pups.
The results suggest a reduced gluconeogenesis from protein and increased production of ketone bodies, which may in part replace glucose as energy source during fasting. Expand
Water flux and early signs of entrance into phase III of fasting in grey seal pups.
- E. Nordøy, D. E. Stijfhoorn, A. Råheim, A. S. Blix
- Chemistry, Medicine
- Acta physiologica Scandinavica
- 1 April 1992
It is concluded that grey seal pups endure 52 d of fasting without intake of water with a minor dehydration of body core, while they become hyperosmotic due to increased catabolism of protein after 38 d when sparing of the insulating blubber layer in preparation for life in cold water seems to occur. Expand