Articles by Author: C J Kleynhans

Search results for C J Kleynhans

We found 12 results for you
  1. A CHECKLIST OF THE FISH SPECIES OF THE CROCODILE AND MATLABAS RIVERS (LIMPOPO SYSTEM) OF THE TRANSVAAL

    A CHECKLIST OF THE FISH SPECIES OF THE CROCODILE AND MATLABAS RIVERS (LIMPOPO SYSTEM) OF THE TRANSVAAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    This paper reports on the results of a fish distribution survey of the Crocodile and Matlabas Rivers (Limpopo System). Fifteen species are recorded for the first time in the Matlabas River. Seven unlisted species are recorded for the Crocodile River,...
  2. THF DISTRIBUTION AND STATUS OF <em>KNERIA AURICULATA</em> (PELLEGRIN)(PISCES: KNERIIDAE) IN THE TRANSVAAL

    THF DISTRIBUTION AND STATUS OF <em>KNERIA AURICULATA</em> (PELLEGRIN)(PISCES: KNERIIDAE) IN THE TRANSVAAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The distribution of Kneria auriculata in the upper reaches of the Crocodile River (Incomati River System) was determined. Knevia auriculata shows a preference for cold mountain streams with calm pools. Five isolated populations exist in such streams. Although no accurate...
  3. A CKECKLIST OF THE FISH SPECIES OF THE MOGOL AND PALALA RIVERS (LIEPOPO SYSTEM) OF THE TRANSVAAL

    A CKECKLIST OF THE FISH SPECIES OF THE MOGOL AND PALALA RIVERS (LIEPOPO SYSTEM) OF THE TRANSVAAL

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    A survey of the fish species of the Mogol and Palala Rivers (Limpopo System) was conducted during 1979 and 1981. Thirty one indigenous fish species were sampled in the Mogol River, five of which were recorded for the first time...
  4. A PRELIMINARY STUDY OF ASPECTS OF THE ECOLOGY OF A RARE MINNOW <em>BARBUS TREURENSIS</em> GROENEWALD, 1958 (PISCES: CYPRINIDAE) FROM THE EASTERN TRANSVAAL, SOUTH AFRICA

    A PRELIMINARY STUDY OF ASPECTS OF THE ECOLOGY OF A RARE MINNOW <em>BARBUS TREURENSIS</em> GROENEWALD, 1958 (PISCES: CYPRINIDAE) FROM THE EASTERN TRANSVAAL, SOUTH AFRICA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The habitat preferences, food habits, reproduction, age and population size of Barbus treurensis were investigated as part of a survey of the threatened fish of the Transvaal. Barbus treurensis occurs only in an isolated section of the Blyde River tributary...
  5. ASPECTS OF THE ECOLOGY OF <em>KNERIA AURICULATA</em> (PELLEGRIN, 1905) (PISCES: KNERIIDAE) FROM THE EASTERN TRANSVAAL SOUTH AFRICA

    ASPECTS OF THE ECOLOGY OF <em>KNERIA AURICULATA</em> (PELLEGRIN, 1905) (PISCES: KNERIIDAE) FROM THE EASTERN TRANSVAAL SOUTH AFRICA

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Seven natural populations of Kneria auriculata occur in tributaries of the Crocodile River (Incomati System) on the eastern Transvaal escarpment. The routes it probably used to colonize these streams are discussed and used to explain its current restricted distribution with...
  6. FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    During 1973/74, Barbus poechii, Oreochromis macrochir, O. andersonii, Serranochromis angusticeps, S. codringtonii, S. robustus and S. thumbergi from the Okavango System were introduced into the Shashe Dam (Limpopo System, Botswana). These species are alien to the Limpopo System. A fish...
  7. 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...
  8. Psychological Well-Being and Resilience as Predictors of First-Year Students' Academic Performance

    Psychological Well-Being and Resilience as Predictors of First-Year Students' Academic Performance

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This study investigated aspects of psychological well-being (burnout and engagement) and resilience as predictors of the academic performance of a group of first-year students at a higher education institution. Participants included 789 first-year students at a South African university (females...
  9. Cavalieri integration

    Cavalieri integration

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    We use Cavalieri's principle to develop a novel integration technique which we call Cavalieri integration. Cavalieri integrals differ from Riemann integrals in that non-rectangular integration strips are used. In this way we can use single Cavalieri integrals to find the...
  10. Development and application of a fish-based Sensitivity-weighted Index of Biotic Integrity (SIBI) for use in the assessment of biotic integrity in the Klip River, Gauteng, South Africa

    Development and application of a fish-based Sensitivity-weighted Index of Biotic Integrity (SIBI) for use in the assessment of biotic integrity in the Klip River, Gauteng, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Biotic indices using fish assemblage characteristics have been applied with great success in river assessments around the world. Internationally the most commonly applied fish index is the Index of Biotic Integrity (IBI), whilst in South Africa the most commonly applied...