calls were manually identified at the southeastern station (BB6) on one day during winter 2013-14 (Fig.
If the Ito cell number reflects the vitamin A exposure through marine prey species, mainly ringed seal and bearded seal
(Ramsay and Stirling 1988), young bears would have lower numbers of Ito cells because they do not start eating prey rich in vitamin A until they are weaned at approximately 2 years of age (Derocher and Stirling 1994).
In Paul John's version of the story, the bearded seal
advises the boy as follows:
Key words: ringed seal, bearded seal
, ribbon seal, Arctic phocid, call repertoire, seasonality, vocalization, sea ice
The bearded seal
, also called the square flipper seal, is found in and near the Arctic Ocean.
Walrus and bearded seals
rely on the ice to guide their migrations as they follow the ice edge north in summer to the Chukchi and south to the Bering Sea for the winter.
This is a huge victory for bearded seals
and shows the vital importance of the Endangered Species Act in protecting species threatened by climate change," Kristen Monsell, attorney for the Center for Biological Diversity - which had, in 2008, filed a petition to list the species as threatened, said in a (http://www.
A city official also spotted the bearded seal
, named after the Tama River in which it was first spotted Aug.
Polar bears are almost exclusively meat-eaters; their diet consists mostly of marine animals such as the ringed seal, bearded seal
and the occasional walrus pup.
Four are ice-adapted (pagophilic, or "ice loving") species that pup on sea ice: bearded seal
(Erignathus barbatus), hooded seal (Cystophora cristata), harp seal (Pagophihis groenlandicus), and ringed seal (Pusa hispida).
Tama-chan'' fever finally caught up with Prime Minister Junichiro Koizumi on Tuesday, with the premier saying he wants to see the popular but elusive bearded seal
sporadically spotted in the Tama and Tsurumi rivers in and around Tokyo.
A study of severe sea-ice conditions, which caused the restriction of open-water and, consequently, of polynya formation in the Beaufort Sea region between 1973 and 1975, found that the numbers of ringed and bearded seal
were reduced by 50% and reproductive rates by about 90% (Stirling et al.