Status of grey seals (<i>Halichoerus grypus</i>) in Norway
نویسندگان
چکیده
منابع مشابه
Habitat-Mediated Dive Behavior in Free-Ranging Grey Seals
Understanding the links between foraging behaviour and habitat use of key species is essential to addressing fundamental questions about trophic interactions and ecosystem functioning. Eight female grey seals (Halichoerus grypus) were equipped with time-depth recorders linked to Fastloc GPS tags following the annual moult in southwest Ireland. Individual dives were coupled with environmental co...
متن کاملMHC genotype and near-deterministic mortality in grey seals
The Major Histocompatability Complex (MHC) is one of the best known and best characterised components of the immune system, yet its functions remain somewhat enigmatic, including both anti-pathogen activity and kin recognition. To explore the importance of the MHC relative to literally hundreds of other components of the immune system, we compared MHC genotype frequencies between pups and adult...
متن کاملCardiac responses of grey seals during diving at sea.
Heart rate, swimming speed and diving depth data were collected from free-ranging grey seals, Halichoerus grypus, as they foraged and travelled in the sea around the Hebrides Islands off western Scotland. Information was collected on a tracking yacht using a combination of sonic and radio telemetry. Diving heart rate declined as a function of dive duration. In long dives, grey seals employed ex...
متن کاملMetabolic rates of captive grey seals during voluntary diving.
The energetic cost of diving in marine mammals is a difficult value to derive given the problems of assessing metabolic rate for an animal at sea. Nevertheless, it is fundamental to our understanding of the foraging strategies of air-breathers exploiting underwater food sources. We measured the metabolic rates of eight captive grey seals, voluntarily diving in a quasi-natural setting. Oxygen co...
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ژورنال
عنوان ژورنال: NAMMCO Scientific Publications
سال: 2007
ISSN: 2309-2491,1560-2206
DOI: 10.7557/3.2719