Results 231 to 240 of about 848,748 (280)
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Patterns of colonization in a metapopulation of grey seals
Nature, 2002The colonization of a new habitat is a fundamental process in metapopulation biology, but it is difficult to study. The emigration of colonists from established populations might be induced by resource competition owing to high local population density.
Gaggiotti, O. +5 more
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Immune responses in common and grey seals during the seal epizootic
Science of The Total Environment, 1992Serological surveys of common and grey seals were performed to monitor the spread of the phocid distemper outbreak in 1988 and its effects on the host immune response. The disease affected mainly common seals; grey seals were largely unaffected but did have anti-CDV antibodies which developed during 1988.
S D, Carter +3 more
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Adoptive Suckling in the Grey Seal
Nature, 1968ALMOST all accounts of the natural history of the grey seal Halichoerus grypus give the impression that a cow invariably seeks and feeds only her own pup among the dozens or hundreds in a breeding colony which may be at an equivalent stage of development as her pup.
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Intestinal displacements in older harbour and grey seals
Diseases of Aquatic Organisms, 2020Intestinal displacements including volvulus, torsion and invagination have been reported in various terrestrial and marine mammals. We conducted pathological investigations on 157 seals that had either stranded on the coasts of the North or Baltic Sea between 1996 and 2015 (115 harbour seals, >19 mo old; 21 grey seals, >13 mo old) or died while ...
E, Ludes-Wehrmeister +6 more
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Changes in fibrinolytic activity in diving grey seals
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 1998In order to test the hypothesis that enhanced fibrinolytic activity is a factor which prevents the blood of diving seals from clotting, we instrumented two female grey seals (Halichoerus grypus) with subcutaneous electrodes for measurements of heart rate (HR) and an extradural intravertebral venous catheter for collection of blood samples before ...
S, Lohman +3 more
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Begging and parent–offspring conflict in grey seals
Animal Behaviour, 2001Theoretical models, assuming an underlying conflict of interest between parents and offspring, suggest that begging can be an honest signal of offspring need provided that it is costly. Models on begging have been tested primarily on those birds in which parents provide care for several offspring.
Smiseth, Per +2 more
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Red cell and serum protein systems of grey seals and habour seals
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1975Abstract 1. 1. Blood samples from twenty-five grey seals of the Farne Island population and nineteen habour seal pups from the Wash were tested for twenty red cell and six serum protein systems. 2. 2. The two species were phenotypically very similar and differed only in the electrophoretic mobility of the Pep C, PGM and NP systems. 3.
E M, McDermid, W N, Bonner
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Infection of grey seals and harbour seals with influenza B virus
International Congress Series, 2001Abstract Background: Influenza B virus is exclusively a human pathogen whose origin and possible reservoir in nature are not known. Seals in the wild are known to be susceptible to influenza A as well as other virus infections. Methods: PCR-based analyses, virus isolation techniques and serological assays were used for the detection of influenza B ...
Fouchier, Ron +4 more
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Nature, 1958
THE interesting account of the Glasgow University Expedition to North Rona and Sula Sgeir in Nature of September 20, p. 775, records that a grey seal calved successfully on North Rona as early as July 6, and adds : “the earliest calves recorded hitherto for Great Britain have been born in mid-August” .
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THE interesting account of the Glasgow University Expedition to North Rona and Sula Sgeir in Nature of September 20, p. 775, records that a grey seal calved successfully on North Rona as early as July 6, and adds : “the earliest calves recorded hitherto for Great Britain have been born in mid-August” .
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THE GREY SEAL AT THE ISLES OF SCILLY.
Proceedings of the Zoological Society of London, 1956SUMMARYThe Cornish Grey Seal colonies have remained static in contrast to a general increase in numbers elsewhere in Britain. At Scilly, almost continuous human interference is thought to have been either directly or indirectly responsible for this.
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