Habitat selection by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean
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چکیده
منابع مشابه
Drift Diving by Hooded Seals (Cystophora cristata) in the Northwest Atlantic Ocean
Many pinniped species perform a specific dive type, referred to as a 'drift dive', where they drift passively through the water column. This dive type has been suggested to function as a resting/sleeping or food processing dive, and can be used as an indication of feeding success by calculating the daily change in vertical drift rates over time, which reflects the relative fluctuations in buoya...
متن کاملInvestigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean
With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare for the next fasting period. Valuable insights into habitat use and diving behaviour during these periods have been obtained by attaching Satellite Relay Data Loggers (SRDLs) t...
متن کاملHooded seal Cystophora cristata foraging areas in the Northeast Atlantic Ocean—Investigated using three complementary methods
Identifying environmental characteristics that define the ecological niche of a species is essential to understanding how changes in physical conditions might affect its distribution and other aspects of its ecology. The present study used satellite relay data loggers (SRDLs) to study habitat use by Northeast Atlantic hooded seals (N = 20; 9 adult females, 3 adult males, and 8 juveniles). Three...
متن کاملAge-dependent prevalence of anti-Brucella antibodies in hooded seals Cystophora cristata.
Investigations of hooded seals Cystophora cristata have revealed high prevalences of Brucella-positive seals in the reduced Northeast Atlantic stock, compared to the increasing Northwest Atlantic stock. This study evaluated the relation between Brucella-serostatus in seals in the Northeast Atlantic stock and age, sex, body condition and reproduction. Bacteriology documented which animals and or...
متن کاملThe eyes of the deep diving hooded seal (Cystophora cristata) enhance sensitivity to ultraviolet light
The mammalian visual range is approximately 400-700 nm, although recent evidence suggests varying ultraviolet (UV) extensions in diverse terrestrial species. UV sensitivity may have advantages in the dim, blue light shifted environment experienced by submerged marine mammals. It may also be advantageous when seals are on land as UV is reflected by snow and ice but absorbed by fur, enhancing vis...
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ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 2012
ISSN: 1095-9289,1054-3139
DOI: 10.1093/icesjms/fss133