Articles by Author: Sm Marr

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  1. An assessment of a proposal to eradicate non-native fish from priority rivers in the Cape Floristic Region, South Africa

    An assessment of a proposal to eradicate non-native fish from priority rivers in the Cape Floristic Region, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Non-native fish are considered the most important threat to the survival of the indigenous freshwater fishes in the Cape Floristic Region (CFR). A pilot project to evaluate the use of the piscicide rotenone to eradicate non-native fish from selected reaches...
  2. Conserving the fishes of the Twee River, Western Cape, South Africa: revisiting the issues

    Conserving the fishes of the Twee River, Western Cape, South Africa: revisiting the issues

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Twee River catchment contains two endemic fish species — the Twee River redfin and the Twee River galaxias — which are threatened by water abstraction, habitat degradation, and the presence of introduced fishes. Fyke nets were used to determine...
  3. Metal bioaccumulation in the fish of the Olifants River, Limpopo province, South Africa, and the associated human health risk: a case study of rednose labeo <em>Labeo rosae</em> from two impoundments

    Metal bioaccumulation in the fish of the Olifants River, Limpopo province, South Africa, and the associated human health risk: a case study of rednose labeo <em>Labeo rosae</em> from two impoundments

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Olifants River, Limpopo River system, is now one of the most polluted rivers in South Africa. The concentrations of metals in fish muscle tissue from two impoundments on the Olifants River, Flag Boshielo Dam and Phalaborwa Barrage, were measured...
  4. Metal contamination and human health risk associated with the consumption of <em>Labeo rosae</em> from the Olifants River system, South Africa

    Metal contamination and human health risk associated with the consumption of <em>Labeo rosae</em> from the Olifants River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Olifants River, a tributary of the Limpopo River system, is one of the most polluted rivers in South Africa. In May 2011 the concentrations of metals in fish muscle tissue from two impoundments, Loskop and Flag Boshielo dams, on...
  5. Morphological variation in the Sabota Lark Calendulauda sabota in southern Africa

    Morphological variation in the Sabota Lark Calendulauda sabota in southern Africa

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Separation of the eight southern African subspecies of Sabota Lark Calendulauda sabota into thick-billed and slender-billed groups has been proposed. This study used biometric data obtained from museum skins in South Africa to evaluate morphological variation in the subspecies as...
  6. Habitat preference of the eastern population of the Short-clawed Lark <em>Certhilauda chuana</em> in the Limpopo province, South Africa

    Habitat preference of the eastern population of the Short-clawed Lark <em>Certhilauda chuana</em> in the Limpopo province, South Africa

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The southern African endemic Short-clawed Lark Certhilauda chuana has two geographically isolated populations. Little is known about the smaller eastern population, which is restricted to the Polokwane Plateau, South Africa. To provide input for a conservation strategy for the eastern...
  7. The ecological integrity of the Lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part A: Olifants River main stem

    The ecological integrity of the Lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part A: Olifants River main stem

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The major rivers of the South African ‘Lowveld’ (low-latitude savanna) suffer numerous impacts from upstream economic activities. Whereas monitoring these rivers is required to detect biodiversity losses, record pollution events and devise mitigation strategies, current monitoring programmes are inadequate. In...
  8. Bioaccumulation of selected metals in the gill, liver and muscle tissue of rednose labeo <em>Labeo rosae</em> from two impoundments on the Olifants River, Limpopo river system, South Africa

    Bioaccumulation of selected metals in the gill, liver and muscle tissue of rednose labeo <em>Labeo rosae</em> from two impoundments on the Olifants River, Limpopo river system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Metal concentrations in the gill, muscle and liver tissues of Labeo rosae from two impoundments, Loskop and Flag Boshielo dams on the Olifants River, were evaluated in 2011 to detect patterns in metal associations between tissues and impoundments. Elevated concentrations...
  9. The ecological integrity of the lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part B: Tributaries of the Olifants River

    The ecological integrity of the lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part B: Tributaries of the Olifants River

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Monitoring on the Lowveld reaches of the Olifants River, Limpopo River System, and its Steelpoort, Blyde, Klaserie and Selati tributaries was initiated in 2009. Analysis of the 2009–2015 data from four Olifants River sites showed deterioration in the river’s ecological...
  10. Human health risks of metals and metalloids in muscle tissue of <em>Synodontis zambezensis</em> Peters, 1852 from Flag Boshielo Dam, South Africa

    Human health risks of metals and metalloids in muscle tissue of <em>Synodontis zambezensis</em> Peters, 1852 from Flag Boshielo Dam, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Muscle tissue from 63 Synodontis zambezensis collected bimonthly in 2013 at Flag Boshielo Dam were analysed for metals and metalloids in a desktop human health risk assessment. The Hazard Quotient, based on a weekly meal of 67 g of fish...