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  • 1
    Electronic Resource
    Electronic Resource
    STONES IN THE STOMACHS OF SOUTHERN ELEPHANT SEALS (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 15 (1999), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1999.tb00900.x
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  • 2
    Electronic Resource
    Electronic Resource
    DENSITY AND HAUL-OUT BEHAVIOR OF LEOPARD SEALS (HYDRURGA LEPTONYX) IN PRYDZ BAY, ANTARCTICA (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 13 (1997), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The spatial distribution of leopard seals along the fast-ice edge in the austral spring and summer of 1992 and 1993 in Prydz Bay, Antarctica, was determined by aerial surveys. Fewer individuals were observed within the area, and the seals observed were larger, in 1992 than in 1993. Comparison of the distributions and relative sizes of the seals suggests that there may be an age-related difference in spatial behavior. The greater degree of separation among older seals may be due to intraspecific aggression increasing with age, a hypothesis supported by the high incidence of intraspecific scarring noted on leopard seals in this region. The seals’haul-out behavior was negatively related to wind-chill index.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1997.tb00632.x
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  • 3
    Electronic Resource
    Electronic Resource
    LOW FREQUENCY NARROW-BAND SOUNDS PRODUCED BY BOTTLENOSE DOLPHINS (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 11 (1995), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We present a new sound type recorded from bottlenose dolphins, Tursiops truncatus, in eastern Australian waters: low-frequency, narrow-band (LFN) harmonic sounds (defined as less than 2 kHz). Most of these sounds were of frequencies less than 1 kHz and were recorded commonly from socializing dolphins. These sounds differ significantly from narrow-band whistles, which are higher in frequency and longer in duration. The absence of these sounds in most studies of the acoustic behavior of bottlenose dolphins may reflect geographic differences in repertoires or result from insufficient sampling. Alternatively, these sounds may have been ignored where the focus of research was on other sound types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1995.tb00673.x
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  • 4
    Electronic Resource
    Electronic Resource
    BEHAVIORAL SIGNIFICANCE OF UNDERWATER VOCALIZATIONS OF CAPTIVE LEOPARD SEALS, HYDURGA LEPTONYX (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 12 (1996), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Two groups of underwater vocalizations were identified in a three-year study of two captive leopard seals, Hydurga leptonyx (one female and one male at Taronga Zoo, Sydney). This was supplemented by recordings over three months from a male at Marineland, New Zealand. The sexual state of the seals at Taronga was deduced from serum hormonal concentrations: the female was considered to be in estrus at specific times during the breeding season. The seal at Marineland, New Zealand was assumed to be sexually mature on the basis of size and age. Of 12 different underwater sound types recorded, six were produced by the seals at Taronga Zoo during agonistic interactions (local calls) and were heard through most of the year. The other six sound types were produced by lone seals. These broadcast calls were produced by the female only when sexually receptive, and by the mature male during December and January, months believed to be the breeding season of wild leopard seals. We propose that underwater acoustic behavior is important in the mating system of this species, and that broadcast calls are used by mature females to advertise their sexual receptivity, and possibly by mature males in search of mates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1996.tb00593.x
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  • 5
    Electronic Resource
    Electronic Resource
    BEHAVIORAL RESPONSES OF EAST AUSTRALIAN HUMPBACK WHALES MEGAPTERA NOVAEANGLIAE TO BIOPSY SAMPLING (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 10 (1994), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The response of migrating humpback whales to biopsy sampling was investigated off North Stradbroke Island, South East Queensland. Whales were allocated a behavioral category prior to biopsy sampling according to the general behavior of their pod. Behavioral reactions were recorded after each attempt. Sex was determined using a molecular genetic technique.Detectable reactions occurred in 41.6% of successful biopsy attempts, a significantly lower response rate than that reported by two studies carried out on the feeding and breeding grounds of the North Atlantic. There was no difference in the response rate of whales on their northward or southward migration. Pod size was not an important factor in predicting the response of an individual. Females responded to biopsy sampling at a significantly higher rate than males.Our results indicate that a substantial difference in response rate can occur between studies. Factors such as the type of boat used and the prior exposure of whales to human impact may be of importance. Our study suggests that female humpback whales may be particularly responsive to human disturbances. Overall, however, biopsy sampling has minimal impact on humpback whales.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1994.tb00496.x
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  • 6
    Electronic Resource
    Electronic Resource
    Cultural revolution in whale songs (2000)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 408 (2000), S. 537-537 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The song patterns of humpback whales (Megaptera novaeangliae) depend on where they live, with populations inhabiting different ocean basins normally singing quite distinct songs. Here we record a unique and radical song change in the song of humpback whales in the Pacific Ocean off the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35046199
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  • 7
    Electronic Resource
    Electronic Resource
    Control of Growth in Two Populations of Elephant Seals (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 1106-1108 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Growth models can explain differences in growth patterns and time of onset of puberty in elephant seal populations at Macquarie Island and Falklands Islands. Elephant seals at Macquarie Island are permanently stunted—possibly because of retarded growth during the suckling ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2171106a0
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  • 8
    Electronic Resource
    Electronic Resource
    Insulating Capacity of the Subcutaneous Fat of the Southern Elephant Seal (1964)
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 1299-1300 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This subcutaneous fat constitutes the greater part of the blubber, which consists of the epidermis, the dermis, and the hypodermis in which the fat is found. The fat layer extends over the whole body with the exception of the tail and nippers and the anterior part of the head, and its insulating ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2031299a0
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  • 9
    Electronic Resource
    Electronic Resource
    Growth and Function of the Subcutaneous Fat of the Elephant Seal (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 597-599 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fat deposition in the southern elephant seal is more closely related to the growth of the fat-free body mass than in terrestrial mammals2, and sex differences in fat content of the carcass seen in terrestrial mammals do not occur in this species. This is presumably associated with the dual ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/220597a0
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  • 10
    Electronic Resource
    Electronic Resource
    The pineal gland is very large and active in newborn antarctic seals (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 564-566 
    Details
    ISSN: 1420-9071
    Keywords: Pineal gland ; melatonin ; thermoregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pineal gland of newborn elephant seals and Weddell seals is larger than in adult females. The gland is considerably larger at birth in Weddell seals than in elephant seals. The former experience greater extremes of temperature. Plasma melatonin concentrations in excess of 2000 pg/ml were recorded in the first days of life, compared with 20–50 pg/ml in adults.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01946705
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