Articles by Keyword: Spatial Genetic Structure

Search results for Spatial Genetic Structure

We found 236 results for you
  1. Phylogeography of oribi antelope in South Africa: evolutionary versus anthropogenic panmixia

    Phylogeography of oribi antelope in South Africa: evolutionary versus anthropogenic panmixia

    Item type: Journal Article • Journal: African Zoology
    The increased rate of human-driven change is a major threat to biodiversity. Although there is sufficient evidence to suggest that species notably alter their ranges, facilitation of such movement for larger vertebrate species often places burdens on management agencies. Oribi...
  2. VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT

    VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Seventy one heterotrophic bacterial isolates were obtained from Wuras Dam, phenotypically characterized and clustered with the unweighted-pair group method. Three groups were obtained of which the first contained 59 members in several clusters. Overall this group was characterized by a...
  3. Patch grazing of Tall Grassveld by cattle after a spring burn

    Patch grazing of Tall Grassveld by cattle after a spring burn

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Patterns of herbage removal by rotationally stocked cattle (at a density of 4.85AUE ha-1) on initially structurally homogenous Tall Grassveld were examined over a single season. Three unreplicated camps were stocked early (29 days), at the recommended '10-15cm' sward height...
  4. Genetically distinct Dutch-domesticated <em>Clarias gariepinus</em> used in aquaculture in southern Africa

    Genetically distinct Dutch-domesticated <em>Clarias gariepinus</em> used in aquaculture in southern Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Clarias gariepinus, a catfish species widely distributed in Africa including South Africa, is naturally absent from the Western Cape and the coastal Eastern Cape provinces. Because of its potential as an aquaculture species it has been widely used in aquaculture...
  5. Mitochondrial and nuclear DNA reveals a complete lineage sorting of <em>Glossogobius callidus</em> (Teleostei: Gobiidae) in southern Africa

    Mitochondrial and nuclear DNA reveals a complete lineage sorting of <em>Glossogobius callidus</em> (Teleostei: Gobiidae) in southern Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Glossogobius callidus exhibits broad salinity tolerance and is distributed in both estuarine and freshwater environments in southern Africa. Previous studies revealed substantial morphological and molecular variation among populations, suggesting they constitute a species complex. The present study utilised phylogenetic and...
  6. Evidence of deep genetic divergence between populations of an important recreational fishery species, <em>Lichia amia</em> L. 1758, around southern Africa

    Evidence of deep genetic divergence between populations of an important recreational fishery species, <em>Lichia amia</em> L. 1758, around southern Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Lichia amia is an important coastal recreational fishery species with a cosmopolitan distribution in the eastern Atlantic. In southern Africa, it is distributed from southern Angola to northern KwaZulu-Natal in South Africa. A recent biological survey revealed differences between Angolan...
  7. Long current to nowhere? — Genetic connectivity of <em>Jasus tristani</em> populations in the southern Atlantic Ocean

    Long current to nowhere? — Genetic connectivity of <em>Jasus tristani</em> populations in the southern Atlantic Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science
    The commercially exploited spiny lobster Jasus tristani has a disjunct distribution in the southern Atlantic Ocean, with populations occurring at the Tristan da Cunha Archipelago, Gough Island and on Vema Seamount. A distance of 2 000km separates Vema and the...
  8. Microclimate conditions in ventilated wet-walled greenhouses in a subtropical climate: spatial variability

    Microclimate conditions in ventilated wet-walled greenhouses in a subtropical climate: spatial variability

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Spatial variations of microclimatic conditions in enclosed north–south (N–S) oriented single-arched greenhouse polycarbonate structures, with a wet-wall providing evaporative cooling at the S end, were investigated and displayed online in near real-time. Temperature-controlled fans at the N end extracted air...
  9. Genetic variability of South African fiscal shrikes (<em>Lanius collaris</em>) across an altitudinal gradient

    Genetic variability of South African fiscal shrikes (<em>Lanius collaris</em>) across an altitudinal gradient

    Item type: Journal Article • Journal: African Zoology
    An electrophoretic allozyme study of the fiscal shrike Lanius collaris, a widely distributed sub-Saharan passerine, was undertaken to investigate altitudinal variation in genetic structure within this species. It is a sedentary bird with limited dispersal so that subpopulations may be...
  10. High population connectivity and Pleistocene range expansion in the direct-developing plough shell <em>Bullia rhodostoma</em> along the South African coast

    High population connectivity and Pleistocene range expansion in the direct-developing plough shell <em>Bullia rhodostoma</em> along the South African coast

    Item type: Journal Article • Journal: African Journal of Marine Science
    Pleistocene climatic and oceanographic changes have influenced the distribution of marine biodiversity in southern Africa. Most evidence, however, has been derived from rocky shore or demersal taxa; data on sandy shore species are limited, despite severe threats to many sandy...