Articles by Author: G J G Hofmeyr

Search results for G J G Hofmeyr

We found 36 results for you
  1. Entanglement of pinnipeds at Marion Island

    Entanglement of pinnipeds at Marion Island

    Item type: Journal Article • Journal: South African Journal of Marine Science
    During the period April 1991–March 1996, 10 entangled Antarctic fur seals Arctocephalus gazella, 28 entangled Subantarctic fur seals A. tropicalis and one entangled southern elephant seal Mirounga leonina were observed at Marion Island, Southern Ocean. Entanglement of fur seals was...
  2. 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...
  3. Serial spawning and batch fecundity of <em>Merluccius capensis</em> and <em>M. Paradoxus</em>

    Serial spawning and batch fecundity of <em>Merluccius capensis</em> and <em>M. Paradoxus</em>

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Histological analysis of the ovaries and the presence of multiple modes in oocyte size frequency distribution of Cape hake Merluccius capensis and M. paradoxus indicates that they are serial spawners. Batch fecundity, calculated by means of the "hydrated oocyte method",...
  4. SEABIRDS OFF THE SOUTHWESTERN COAST OF AFRICA

    SEABIRDS OFF THE SOUTHWESTERN COAST OF AFRICA

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Summerhayes, C. P., Hofmeyr. P. K. & Rioux, R. H. 1974. Seabirds off the southwestern coast of Africa. Ostrich 45: 83–109.
  5. ESTABLISHMENT, GROWTH AND CONSERVATION OF A MAINLAND COLONY OF JACKASS PENGUINS <em>SPHENISCUS DEMERSUS</em> AT STONY POINT, BETTY'S BAY, SOUTH AFRICA

    ESTABLISHMENT, GROWTH AND CONSERVATION OF A MAINLAND COLONY OF JACKASS PENGUINS <em>SPHENISCUS DEMERSUS</em> AT STONY POINT, BETTY'S BAY, SOUTH AFRICA

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Whittington, P.A., Hofmeyr, J.H. & Cooper, J. 1996. Establishment, growth and conservation of a mainland colony of Jackass Penguins Spheniscus demersus at Stony Point, Betty's Bay, South Africa. Ostrich 67: 144–150.
  6. Early post-release survival of stranded Cape fur seal pups at Black Rocks, Algoa Bay, South Africa

    Early post-release survival of stranded Cape fur seal pups at Black Rocks, Algoa Bay, South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    The small and isolated Cape fur seal Arctocephalus pusillus pusillus rookery at Black Rocks, Algoa Bay, South Africa, is an important component of the marine biota of the Addo Elephant National Park. Although little is known of the demographics of...