Results 161 to 170 of about 25,342 (214)

Tocopherol distribution in the harp seal, Pagophilus groenlandicus

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1975
Abstract 1. Tocopherol concentrations in harp seal (Pagophilus groenlandicus) blubber, kidney, liver, heart and skeletal muscle, and plasma were determined by gas-liquid chromatography. 2. Only α-tocopherol was found, with blubber having the highest concentration, 90 μg/g.
F R, Engelhardt, J R, Geraci, B L, Walker   +2 more
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Bile acids from the harp seals, Phoca groenlandica

Comparative Biochemistry and Physiology Part A: Physiology, 1988
1. The bile acids composition of the harp seal, Phoca groenlandica, collected around Newfoundland, Canada, had been examined. 2. 13C n.m.r. spectroscopy of the crude bile extract was superior to t.l.c. analysis in revealing the presence of phocaecholic acid and a taurine moiety in this mixture. 3.
J, Hellou, A, King, I H, Ni
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Pollutants in harp seals (Phoca groenlandica). I. Organochlorines

Science of The Total Environment, 1984
Between 1976 and 1978, 248 harp seals were sampled from 5 locations in the Northwest Atlantic and Arctic for organochlorine (OC) residue analysis in tissue. Blood, kidney, brain, muscle and blubber samples were analysed for PCB, DDT, dieldrin, hexachlorobenzene (HCB), and heptachlor epoxide. Levels were generally greatest in blubber tissue.
K, Ronald, R J, Frank, J L, Dougan, R, Frank, H E, Braun   +4 more
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Remarks on Eskimo Sealing and the Harp Seal Controversy

ARCTIC, 1967
Considers the importance of the seal harvest to Eskimos of Alaska, Canada and Greenland and gives statistics on catches, prices, incomes and costs of modernization of the seal-hunting industry. The catastrophic decline of sealskin prices and buyers boycott beginning 1965 as a result of the controversy over killing methods of harp seal pups has ...
openaire   +1 more source

Blubber and flipper heat transfer in harp seals

Acta Physiologica Scandinavica, 1997
The trunk of marine mammals is encased in a blubber layer which provides thermal insulation that can be changed by circulatory adjustments. The extremities, on the other hand, are poorly insulated but have vascular arrangements constructed for prevention or promotion of heat loss, depending on the thermal state of the animal.
P H, Kvadsheim, L P, Folkow
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Repetitive rates of harp seal underwater vocalizations

Canadian Journal of Zoology, 1987
Underwater recordings of harp seal (Phoca groenlandica) vocalizations, obtained within the breeding herd during March, were examined with respect to calling rate and repetition of calls. Vocalizations typically overlapped one another. Calling rates ranged from 32 to 88 calls/min. Repetition rates averaged between 1.9 and 4.7 sound pulses/call (maximum
J. M. Terhune, G. MacGowan, L. Underhill, K. Ronald   +3 more
openaire   +1 more source

Assessment of body condition of harp seals

Polar Biology, 1994
We investigated the relationships between blubber content and a suite of condition indices in harp seals (Phoca groenlandica). Although blubber content was significantly correlated with xiphosternal blubber depth and “Condition index” they were insensitive indicators of condition. Blubber depth was most variable at a site ca.
Rosemary Gales, Deane Renouf
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Critical factors determining harp seal reproduction

Fisheries
Since 2009, the harp seal (HS) trade in Russia has ceased; however, pup production in the White Sea population remains low. Published data on HS nutrition, the energy expenditure on reproduction, and the state of the food supply are reviewed to identify the causes of low pup production. It has been shown that GT females, like all representatives of the
A. I. Boltnev, V. A. Belyaev, N. P. Antonov   +2 more
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Determining lactose content of harp seal milk

Canadian Journal of Zoology, 1983
Lactose levels in harp seal (Phoca groenlandica) milk were estimated using three quantitative techniques (phenol–sulphuric acid, anthrone reagent, and picric acid). Based on its low coefficient of variation, accuracy, and simplicity, the anthrone technique was the preferred method.
R. E. A. Stewart, B. E. Webb, D. M. Lavigne, F. Fletcher   +3 more
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Neonatal Growth of Northwest Atlantic Harp Seals, Pagophilus groenlandicus

Journal of Mammalogy, 1980
Morphometric data were obtained from 219 neonatal harp seals in the Northwest Atlantic in March and April, 1976 to 1979. At birth, pups weighed 10.8 ± 0.65 kg and grew at a rate of 2.5 kg/day during the nursing period, which lasted about 9 days. Much of this weight gain (1.9 kg/day) was associated with deposition of the subcutaneous layer of insulating
R E, Stewart, D M, Lavigne
openaire   +2 more sources