Articles by Author: Ak Whitfield

Search results for Ak Whitfield

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  1. Composition, species richness and similarity of ichthyofaunas in eelgrass <em>Zostera capensis</em> beds of southern Africa

    Composition, species richness and similarity of ichthyofaunas in eelgrass <em>Zostera capensis</em> beds of southern Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    This study collates published and unpublished data on the ichthyofaunas associated with beds of eelgrass Zostera capensis in eight estuaries and one lagoon in southern Africa. These macrophyte beds are utilized predominantly by small teleosts, both species which breed in...
  2. The distribution of littoral fish associated with eelgrass <em>Zostera capensis</em> beds in the Kariega Estuary, a southern African system with a reversed salinity gradient

    The distribution of littoral fish associated with eelgrass <em>Zostera capensis</em> beds in the Kariega Estuary, a southern African system with a reversed salinity gradient

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Eelgrass Zostera capensis has expanded its distribution in the Kariega Estuary mainly in response to the reduced salinity gradient in that system. Seine-net sampling showed that Atherina breviceps, Rhabdosargus holubi, Glossogobius callidus and Mugilidae were the most common fish taxa...
  3. <em>Gilchristella aestuaria</em> (Pisces: Clupeidae) biomass and consumption of zooplankton in the Sundays Estuary

    <em>Gilchristella aestuaria</em> (Pisces: Clupeidae) biomass and consumption of zooplankton in the Sundays Estuary

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Gilchristella aestuaria is an important resident zooplanktivorous fish species in most southern African estuarine systems. The dry mass of this species in the Sundays Estuary during 1986/87 ranged from 11 g·m−3 in the lower reaches to 178 g·m−3 in the...
  4. FEEDING SUCCESSION AND ZONATION OF AQUATIC BIRDS AT FALSE BAY, LAKE ST LUCIA

    FEEDING SUCCESSION AND ZONATION OF AQUATIC BIRDS AT FALSE BAY, LAKE ST LUCIA

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Whitfield, A. K. & Cyrus, D. P. 1978. Feeding succession and zonation of aquatic birds at False Bay, Lake St Lucia. Ostrich 49:8-15.
  5. SHORT NOTES

    SHORT NOTES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  6. FEEDING ECOLOGY OF PISCIVOROUS BIRDS AT LAKE ST LUCIA, Part 1: Diving Birds

    FEEDING ECOLOGY OF PISCIVOROUS BIRDS AT LAKE ST LUCIA, Part 1: Diving Birds

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Whitfield, A. K. & Blaber, S. J. M. 1978. Feeding ecology of piscivorous birds at Lake St Lucia, Part 1: Diving birds. Ostrich 49:185-198.
  7. FEEDING ECOLOGY OF PIS CIVOROUS BIRDS AT LAKE ST LUCIA, PART 2: WADING BIRDS

    FEEDING ECOLOGY OF PIS CIVOROUS BIRDS AT LAKE ST LUCIA, PART 2: WADING BIRDS

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Whitfield, A. K. & Blaber, S. J. M. 1978. Piscivorous birds at Lake St Lucia, Part 2: Wading birds. Ostrich 50:1-9.
  8. SHORT NOTES

    SHORT NOTES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  9. DISTRIBUTION AND DIVERSITY OF MKUZE SWAMP FISHES DURING A SUMMER FLOOD

    DISTRIBUTION AND DIVERSITY OF MKUZE SWAMP FISHES DURING A SUMMER FLOOD

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Very little information is available on the fishes of the Mkuze swamps and this paper presents the results of an ichthyofaunal survey conducted in March 1988. The study, which coincided with a major river flood, determined that the fish fauna...