Results 111 to 120 of about 357 (144)

Hooded Seal, Cystophora cristata: Supposed Fossil Records in North America

Journal of Mammalogy, 1983
Clayton E Ray
exaly   +2 more sources

Hypoxia in freely diving hooded seal, Cystophora cristata

Comparative Biochemistry and Physiology Part A: Physiology, 1976
1. 1. Seals have been found to tolerate low arterial O2-tensions without initiating breathing. 2. 2. The effect of reduced O2 content of the inspiration air on ventilation and diving behaviour was studied in 2 freely diving hooded seals. 3. 3.
openaire   +2 more sources

An SEM study of Phocascaris cystophorae Berland, 1964 (Nematoda: Anisakidae), a parasite of the hooded seal Cystophora cristata

Systematic Parasitology, 2002
Scanning electron microscopy was used to study the surface morphological characteristics (excretory pore, interlabia knobs, lips and adjacent structures, caudal papillae and papilla-like structures) of the nematode Phocascaris cystophorae, a parasite from the stomach of the hooded seal Cystophora cristata.
Elvira, Abollo, Santiago, Pascual
openaire   +2 more sources

HOODED SEAL (CYSTOPHORA CRISTATA) RECORDS FROM THE SOUTHERN GULF OF MAINE

Northeastern Naturalist, 2001
Abstract Hooded seals (Cystophora cristata) whelp on the North Atlantic pack ice in early spring and then historically distribute as far south as Nova Scotia. Recent reports document increased sightings in the northern Gulf of Maine. To determine the number of sightings in the southern Gulf of Maine, we reviewed records of stranded hooded seals between
David E. Harris, Barbara Lelli, Greg Jakush, Greg Early   +3 more
openaire   +1 more source

Annual distribution of hooded seals ( Cystophora cristata ) in the Greenland and Norwegian Seas

Polar Biology, 1996
Nineteen hooded seals (Cystophora cristata) were tagged with satellite-linked platform terminal transmitters (PTT) on the sea ice near Jan Mayen. Fifteen were instrumented after completion of the mouly in July 1992 (five males, ten females, at 71°N, 12°W), and four during breeding in March 1993 (four females, at 69°N, 20°W).
Lars P. Folkow, Per-Erik Mårtensson, Arnoldus Schytte Blix   +2 more
openaire   +1 more source

The acoustic repertoire of hooded seals (Cystophora cristata)

Canadian Journal of Zoology, 1995
Airborne and waterborne acoustic sounds of hooded seals (Cystophora cristata) were recorded during the breeding seasons of 1988 and 1989 in the Gulf of St. Lawrence, Canada. During 36 h of in-air focal-animal sampling and 9 h of ad libitum underwater sampling, 410 sounds, in total, were recorded and analyzed.
Karen Ann Ballard, Kit M. Kovacs
openaire   +1 more source

Plasma and blood volumes of the hooded seal (Cystophora cristata)

Canadian Journal of Zoology, 1987
Plasma volumes and haematocrits were determined in six hooded seals (Cystophora cristata) and blood volumes were estimated. Expressed on a total body weight basis, plasma volume was found to range from 39 to 109 mL∙kg−1 and blood volume from 93 to 222 mL∙kg−1.
K. M. Keiver, M. Chandler, R. J. Frank, K. Ronald   +3 more
openaire   +1 more source

Some hooded seal (Cystophora cristata) sounds in March

Canadian Journal of Zoology, 1973
A few underwater and in-air sounds of the hooded seal (Cystophora cristata) were recorded on the pupping areas in the Gulf of St. Lawrence. The male emits underwater calls. In air, the inflation and deflation of the adult male's proboscis produces sounds of low intensity. The adult female and the pup both have an in-air call. All of the vocalizations (
J. M. Terhune, K. Ronald
openaire   +1 more source

Diving behaviour of hooded seals ( Cystophora cristata ) in the Greenland and Norwegian Seas

Polar Biology, 1999
Satellite-linked dive recorders were used to collect data on depths and durations of ∼120,000 dives by 16 hooded seals (Cystophora cristata). Following tagging after moult (four males, eight females) and breeding (four females) off east Greenland, seals dispersed widely in the northeast Atlantic during 172 ± 97 days (mean satellite-linked dive recorder
Lars P. Folkow, Arnoldus Schytte Blix
openaire   +1 more source

Paternity exclusion by DNA fingerprinting, and mate guarding in the hooded seal Cystophora cristata

Molecular Ecology, 1994
AbstractHooded seal Cystophora cristata trios consist of an adult female, her pup, and an attending adult male. Using DNA fingerprinting, we excluded the possibility that the attending males within hooded seal trios were the fathers of the pups, proving that these hooded seals did not remain paired from one breeding season to the next.
S B, McRae, K M, Kovacs
openaire   +2 more sources