Articles by Author: J Cooper

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  1. The comparative feeding behaviour of‐goats and impalas <em>die vergelykende voedingsgedrag van boerbokke en rooibokke</em>

    The comparative feeding behaviour of‐goats and impalas <em>die vergelykende voedingsgedrag van boerbokke en rooibokke</em>

    The feeding behaviour of goats and impalas was compared in terms of the allocation of feeding time to different food sources, the species of plants favoured and the feeding rates obtained from them.
  2. Plant palatability assessment and its implications for plant‐herbivore relations

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    An objective method used to assess the palatability of the foliage of woody plant species to kudus, impalas and goats is described. Observations were made on the feeding behaviour of tame animals in the Nylslvey Nature Reserve in northern Transvaal...
  3. Distribution, population size and conservation of the Cape gannet <em>Morus capensis</em>

    Distribution, population size and conservation of the Cape gannet <em>Morus capensis</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The Cape gannet is endemic to the southern African coast where it currently breeds at six islands: Mercury, Ichaboe and Possession off South West Africa and Bird (Lambert's Bay), Malgas and Bird (Algoa Bay) off South Africa. Previously, breeding also...
  4. Distribution, population size and conservation of the jackass penguin <em>Spheniscus demersus</em>

    Distribution, population size and conservation of the jackass penguin <em>Spheniscus demersus</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The jackass penguin, endemic to southern Africa, is the only member of the Sphenisciformes now breeding in Africa. Its breeding distribution extends from Sylvia Hill, South West Africa (Namibia), to Bird Island, Algoa Bay, South Africa. The non-breeding range extends...
  5. A note on the diet of Cape cormorant <em>Phalacrocorax capensis</em> at Mercury Island, South West Africa, in November 1978

    A note on the diet of Cape cormorant <em>Phalacrocorax capensis</em> at Mercury Island, South West Africa, in November 1978

    Item type: Journal Article • Journal: South African Journal of Marine Science
    During November 1978, Cape cormorants Phalacrocorax capensis at Mercury Island, off South West Africa (Namibia), consumed practically exclusively pelagic gobies Sufflogobius bibarbalus. The mean number of fish per regurgitation was 52 with a mean caudal length of 48 mm and...
  6. Observer precision and bird conspicuousness during counts of birds at sea

    Observer precision and bird conspicuousness during counts of birds at sea

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Simultaneous transect counts of seabirds by pairs of experienced, ship-based observers were compared to estimate count precision, defined as the proportion of birds counted by both observers. Precision was low; at most 51 per cent for all birds combined, with...
  7. A note on wind-driven replacement flow of the bottom layer in Saldanha Bay, South Africa: implications for pollution

    A note on wind-driven replacement flow of the bottom layer in Saldanha Bay, South Africa: implications for pollution

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The unexpected effect of a synoptic-scale event (passage of a cold front) on the advection of water across the mouth of Small Bay, Saldanha Bay, is recorded. From a current-meter record, it is shown how the strength (> 15m·s−1) and...
  8. OBSERVATIONS ON THE DIETARY CHOICE OF FREE-RANGING JUVENILE OSTRICHES

    OBSERVATIONS ON THE DIETARY CHOICE OF FREE-RANGING JUVENILE OSTRICHES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Cooper, S.M. & Palmer, T. 1994. Observations on the dietary choice of free-ranging juvenile Ostriches. Ostrich 65:251-255.
  9. Conservation of an increasing population of great white pelicans <em>Pelecanus onocrotalus</em> in South Africa's Western Cape

    Conservation of an increasing population of great white pelicans <em>Pelecanus onocrotalus</em> in South Africa's Western Cape

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Unlike many pelican populations, that of the great white pelican Pelecanus onocrotalus in the Western Cape, South Africa, has increased in size, from 20–30 pairs in the first half of the century to over 500 in 1993. The population increase...
  10. Trends of African penguin <em>Spheniscus demersus</em> populations in the 20th century

    Trends of African penguin <em>Spheniscus demersus</em> populations in the 20th century

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The entire nesting population of African penguins Spheniscus demersus was about 575 000 adults at the start of the 20th century. Numbers halved by the 1950s and continued to fall to about 220 000 by the late 1970s and about...