Results 181 to 190 of about 575 (222)

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.
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Narcotics in hooded seals (Cystophora cristata): a preliminary report

Canadian Journal of Zoology, 1979
Immobilizing darts containing either of the narcotics fentanyl or etorphine were used on 15 adult hooded seals (Cystophora cristata Erxleben). Of these seals, 13 were successfully tagged. The narcotic antagonist naloxone was administered to all seals.
J C, Haigh, R E, Stewart
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Adrenergic vasomotor responses in nasal mucosa of hooded seals

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1992
In seals respiratory heat and water losses are restricted through nasal heat exchange. The heat exchange efficiency is apparently controlled through adjustments in the nasal mucosal blood flow rate and/or pattern. In this study the adrenergic mechanisms involved in regulation of mucosal blood flow were investigated. The nasal mucosal vasculature of 14
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POSTPARTUM DYNAMICS OF REPRODUCTIVE HORMONES IN GRAY AND HOODED SEALS

Marine Mammal Science, 2005
The hormonal changes associated with lactation typically inhibit ovulation and estrus to prevent concurrent pregnancy and competition for maternal energy resources. However, some animals such as kangaroos and pinnipeds undergo estrus during lactation (Boyd 1991a, Muths and Hinds 1996).
J. E. Mellish, S. J. Iverson
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Observations On Nursing Behaviour of Hooded Seals, Cystophora Cristata

Behaviour, 1992
Abstract This study reports the first quantitative data on nursing behaviour of hooded seals which have a four-day nursing period, the shortest known for any mammal. Twenty mother pup-pairs were observed at a whelping patch off the coast of Newfoundland, Canada during March, 1990.
Elizabeth A. Perry, Garry B. Stenson
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Blood volume in hooded seals: implications for diving capacity

Canadian Journal of Zoology, 2000
Plasma volumes of seven adult hooded seals, Cystophora cristata (two males and five females; body mass (M) range = 110-234 kg), captured on sea ice off east of Greenland during breeding (March-April), ranged between 35 and 54 mL/kg M (median = 46.5 mL/kg M).
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History and present status of populations of harp and hooded seals

Biological Conservation, 1976
Abstract The biology of harp (Pagophilus groenlandicus Erxleben) and hooded (Cystophora cristata Erxleben) seals is described. These abundant species inhabit the seasonally-shifting pack ice of the North Atlantic. Intensive hunting over 150 years depleted but did not exterminate three harp seal populations, which initially may have totalled some 9 ...
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An Injured Female Hooded Seal

Veterinary Clinical Pathology, 1997
S. McConkey, B. Horney, G. Conboy, S. Burton, L. Ruschkowski, J. Parsons   +5 more
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Report of the Working Group on Harp and Hooded Seals (WGHARP)

1990
WGHARP met 16-19 October 1989 in Bergen, Norway. 
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Distribution and diving behaviour of hooded seals

1995
L.P. Folkow, A.S. Blix
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