Articles by Author: Aj Ross

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  1. New records of southern elephant seals <em>Mirounga leonina</em> L. on the coast of southern Africa

    New records of southern elephant seals <em>Mirounga leonina</em> L. on the coast of southern Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Systematic recording of elephant-seal sightings, including 92 hitherto unpublished records, has increased the number of records on the coast of southern Africa to 130. The data set is now the largest on record for any southern continent other than Antarctica...
  2. Population estimates for bottlenose dolphins <em>Tursiops truncatus</em> in Natal and Transkei waters

    Population estimates for bottlenose dolphins <em>Tursiops truncatus</em> in Natal and Transkei waters

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Population estimates of bottlenose dolphins Tursiops truncatus on the Natal (five replicates) and Transkei (two replicates) coasts are made from aerial inshore strip-transects conducted between 23 April and 5 May 1985. Counts of dolphin schools and numbers were made in...
  3. Organochlorines in bottlenose dolphins <em>Tursiops truncatus</em> from the east coast of South Africa

    Organochlorines in bottlenose dolphins <em>Tursiops truncatus</em> from the east coast of South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Concentrations of polychlorinated biphenyls (PCBs), t-DDT (DDT + DDE + DDD) and dieldrin were determined in blubber samples of 105 bottlenose dolphins inhabiting the coastal waters of the east coast of South Africa. Residue concentrations increased with age and, in...
  4. Bottlenose dolphin <em>Tursiops truncatus</em> distribution in Natal's coastal waters

    Bottlenose dolphin <em>Tursiops truncatus</em> distribution in Natal's coastal waters

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The distribution of bottlenose dolphins Tursiops truncatus between the Tugela River mouth, Natal, and the Transkei border was investigated. Comparison of sighting rates between the periods 1974–1978 and 1984–1988, accumulated by personnel servicing shark nets at 42 localities, indicated six...
  5. Distribution and status of bottlenose dolphin <em>Tursiops truncatus</em> on the south coast of Natal, South Africa

    Distribution and status of bottlenose dolphin <em>Tursiops truncatus</em> on the south coast of Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The offshore distribution and abundance of bottlenose dolphins Tursiops truncatus along the Natal South Coast was assessed aerially in May of 1989 and 1990. Unlike off the Natal North Coast and the Eastern Cape, a substantial proportion of sightings was...
  6. The distribution of small odontocete cetaceans off the coasts of South Africa and Namibia

    The distribution of small odontocete cetaceans off the coasts of South Africa and Namibia

    Item type: Journal Article • Journal: South African Journal of Marine Science
    A total of 2 077 records of approximately 49 000 small cetaceans, including dedicated and incidental sightings and specimens, was analysed to define distribution patterns of the 28 species found within southern African waters. Distribution analyses reveal distinct component patterns,...
  7. Variability in the diet of the Cape gannet at Bird Island, Algoa Bay, South Africa

    Variability in the diet of the Cape gannet at Bird Island, Algoa Bay, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Results are presented following a long-term study of the diet of the Cape gannet Morus capensis at Bird Island, Algoa Bay, examining 4 178 regurgitations representing 36 351 prey items collected during 12 breeding cycles from April 1979 to March...
  8. Whale observations from the Knysna Heads, 1903–1906

    Whale observations from the Knysna Heads, 1903–1906

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Sightings of 912 whales made by the pilot(s) at the Knysna Heads on the southern coast of South Africa between 1903 and 1906 provide information on the relative numbers of right whales Eubalaena australis and humpback whales Megaptera novaeangliae before...