Articles by Author: Gp Tweddle

Search results for Gp Tweddle

We found 15 results for you
  1. BREEDING BEHAVIOUR OF THE MPASA, <em>OPSARIDIUM MICROLEPIS</em> (GUNTHER) (PISCES:CYPRINIDAE), IN LAKE MALAWI

    BREEDING BEHAVIOUR OF THE MPASA, <em>OPSARIDIUM MICROLEPIS</em> (GUNTHER) (PISCES:CYPRINIDAE), IN LAKE MALAWI

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Observations on the breeding behaviour of mpasa, a commercially valuable cyprinid endemic to Lake Malawi, were conducted in the Bua and North Rukuru Rivers. The spawning run takes place over an extended period during and after the rains, with an...
  2. AN ASSESSMENT OF THE GROWTH RATE OF MPASA, <em>OPSABIDIUM MICROLEPIS</em> (GUNTHER, 1864) (PISCES: CRYPRINIDAE), BY LENGTH FREQUENCY ANALYSIS

    AN ASSESSMENT OF THE GROWTH RATE OF MPASA, <em>OPSABIDIUM MICROLEPIS</em> (GUNTHER, 1864) (PISCES: CRYPRINIDAE), BY LENGTH FREQUENCY ANALYSIS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The mpasa, Opsaridium microlepis, is an important commercial species in areas of Lake Malawi near major inflowing rivers during annual spawning migrations. Plots of length frequency data collected over a series of years from mpasa catches in the Bua and...
  3. SHORT NOTES

    SHORT NOTES

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
  4. PRELIMINARY OBSERVATIONS ON THE FISH POPULATIONS OF THE RECENTLY-IMPOUNDED KATSE RESERVOIR, LESOTHO

    PRELIMINARY OBSERVATIONS ON THE FISH POPULATIONS OF THE RECENTLY-IMPOUNDED KATSE RESERVOIR, LESOTHO

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Katse is a new 35 km long impoundment on the Malibamatso River, a highland tributary of the Orange River in Lesotho. Two fishing surveys in 1996 yielded Barbus aeneus, Labeo capensis, Oncorhynchus mykiss and the occasional Austroglanis sclateri. Length frequency...
  5. 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...
  6. AN ASSESSMENT OF THE GROWTH RATE OF MPASA, <em>OPSABIDIUM MICROLEPIS</em> (GUNTHER, 1864) (PISCES: CRYPRINIDAE), BY LENGTH FREQUENCY ANALYSIS

    AN ASSESSMENT OF THE GROWTH RATE OF MPASA, <em>OPSABIDIUM MICROLEPIS</em> (GUNTHER, 1864) (PISCES: CRYPRINIDAE), BY LENGTH FREQUENCY ANALYSIS

    The mpasa, Opsaridiwm microlepis, is an important commercial species in areas of Lake Malawi near major inflowing rivers during annual spawning migrations. Plots of length frequency data collected over a series of years from mpasa catches in the Bua and...
  7. Evidence for lacustrine breeding by sanjika <em>Opsaridium microcephalum</em> (Teleostei: Cyprinidae) in Lake Malawi

    Evidence for lacustrine breeding by sanjika <em>Opsaridium microcephalum</em> (Teleostei: Cyprinidae) in Lake Malawi

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Three species of Opsaridium occur in the Lake Malawi catchment. The kabyabya Opsaridium tweddleorum is a small species restricted to inflowing rivers and streams, the mpasa Opsaridium microlepis is a large lake-dwelling species that ascends the lower reaches of inflowing...
  8. Influence of mouth status on population structure of southern African endemic estuarine-spawning ichthyofauna in a temperate, temporarily open/closed estuary

    Influence of mouth status on population structure of southern African endemic estuarine-spawning ichthyofauna in a temperate, temporarily open/closed estuary

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effect of mouth status on the population structure of three endemic estuarine-spawning fish species was assessed using seine nets from November 2005 to October 2007 in the temporarily open/closed Mpekweni Estuary, Eastern Cape, South Africa. Collectively, these three species...