Articles by Keyword: Habitat Complexity

Search results for Habitat Complexity

We found 91 results for you
  1. The effect of plant density on epiphytic macroinvertebrates associated with a submerged macrophyte, <em>Lagarosiphon ilicifolius</em> Obermeyer, in Lake Kariba, Zimbabwe

    The effect of plant density on epiphytic macroinvertebrates associated with a submerged macrophyte, <em>Lagarosiphon ilicifolius</em> Obermeyer, in Lake Kariba, Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effect of variations in the density of a submerged macrophyte, Lagarosiphon ilicifolius, on epiphytic macroinvertebrate community structure in the shallow waters of a sheltered bay of Lake Kariba were investigated. The body size class distributions of a mayfly, Cloeon...
  2. Seasonal habitat requirements of Lemon Dove (<em>Aplopelia larvata</em>) in coastal forest: camera-trap surveys of a reclusive species

    Seasonal habitat requirements of Lemon Dove (<em>Aplopelia larvata</em>) in coastal forest: camera-trap surveys of a reclusive species

    Item type: Journal Article • Journal: African Zoology
    The modification of natural habitats requires behavioural plasticity, which may be challenging for ‘specialist’ species. Quantifying habitat requirements and behavioural responses of specialists to landscape transformation is thus a priority for baseline data to inform conservation practices. Using camera-trap surveys...
  3. ON THE STATUS OF CLARIAS GARIEPINUS (BURCHELL) IN LARGE MAN-MADE LAKES IN RHODESIA

    ON THE STATUS OF CLARIAS GARIEPINUS (BURCHELL) IN LARGE MAN-MADE LAKES IN RHODESIA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Data from some large man-made lakes in Rhodesia suggest that the populations of Clarias gariepinus have declined in these lakes. The reasons for this are not clear although commercial fishing does not appear to be responsible.
  4. Habitat management in control of <em>Astylus atromaculatus</em> (Coleoptera: Melyridae) in maize under subsistence farming conditions in South Africa

    Habitat management in control of <em>Astylus atromaculatus</em> (Coleoptera: Melyridae) in maize under subsistence farming conditions in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Studies were conducted in South Africa to assess the potential role of a habitat management strategy developed for the control of cereal stemborers in control of Astylus beetle. This strategy involves intercropping maize with a stemborer moth-repellent fodder plant (Desmodium)...
  5. A review of orange roughy <em>Hoplostethus atlanticus</em> fisheries, estimation methods, biology and stock structure

    A review of orange roughy <em>Hoplostethus atlanticus</em> fisheries, estimation methods, biology and stock structure

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Orange roughy Hoplostethus atlanticus are unusual fish. They form dense aggregations that have fuelled lucrative fisheries at great depths (600–1 400 m), especially off Namibia, New Zealand and Australia. They are thought to be very long-lived (>100 years, maturity at...
  6. The ethics of complexity and the complexity of ethics

    The ethics of complexity and the complexity of ethics

    Item type: Journal Article • Journal: South African Journal of Philosophy
    In this paper, we investigate the implications that a general view of complexity - i.e. the view that complex phenomena are irreducible - hold for our understanding of ethics. In this view, ethics should be conceived of as constitutive of...
  7. THE HABITATS AND HABITAT PREFERENCES OF <underline>CLARIAS GARIEPINUS</underline> (PISCES: CLARIIDAE) IN A CLEAR COASTAL LAKE (LAKE SIBAYA, SOUTH AFRICA)

    THE HABITATS AND HABITAT PREFERENCES OF <underline>CLARIAS GARIEPINUS</underline> (PISCES: CLARIIDAE) IN A CLEAR COASTAL LAKE (LAKE SIBAYA, SOUTH AFRICA)

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The habitat preferences of the sharptooth catfish, Clarias gariepinus, in a clear coastal lake, Lake Sibaya, are described. Larval and small juvenile catfish inhabit flotsam and the rootstocks of plants in very shallow marginal areas. Larger juveniles inhabit densely-vegetated marginal...
  8. PRELIMINARY OBSERVATIONS ON THE MACROCRUSTACEA OF COASTAL LAKES IN THE VICINITY OF RICHARDS BAY, ZULULAND, SOUTH AFRICA

    PRELIMINARY OBSERVATIONS ON THE MACROCRUSTACEA OF COASTAL LAKES IN THE VICINITY OF RICHARDS BAY, ZULULAND, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    A limited amount of research has been carried out on the four coastal lakes in the Richards Bay area. Due to the impending threat of water pollution from industrial, mining and residential areas within the catchments of these lakes there...
  9. NEW DISTRIBUTION RECORDS FOR <em>CLARIAS THEODORAE</em> WEBER 1897, <em>BARBUS EUTAENIA</em> BOULENGER 1904, <em>BARBUS POLYLEPIS</em> BOULENGER 1907 AND <em>OPSARIDIUM ZAMBEZENSE</em> (PETERS 1852) FROM THE WATERBERG, TRANSVAAL, SOUTH AFRICA.

    NEW DISTRIBUTION RECORDS FOR <em>CLARIAS THEODORAE</em> WEBER 1897, <em>BARBUS EUTAENIA</em> BOULENGER 1904, <em>BARBUS POLYLEPIS</em> BOULENGER 1907 AND <em>OPSARIDIUM ZAMBEZENSE</em> (PETERS 1852) FROM THE WATERBERG, TRANSVAAL, SOUTH AFRICA.

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    New distribution records for four fish species in the Waterberg mountains of the Transvaal were established during surveys since 1987–92. Clarias theodorae was previously reported from one locality each in the Waterberg and Soutpansberg. The current survey disclosed its presence...
  10. Shoot and root biomass allocation and competitive hierarchies of four South African grass species on light, soil resources and cutting gradients

    Shoot and root biomass allocation and competitive hierarchies of four South African grass species on light, soil resources and cutting gradients

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    We examined the competitive ability and response to light (shaded or unshaded), nutrients (50% Hoaglands solution or tap water), water (frequent or infrequent watering) and cutting (cut or uncut) of four grass species that differ in their traits, habitat preferences...