Articles by Author: Judem Mathooko

Search results for Judem Mathooko

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  1. THE EFFECTS OF PHYSICAL DISTURBANCE ON <em>AFROPTILUM SUDAFRICANUM</em> (EPHEMEROPTERA: BAETIDAE) POPULATION DENSITIES IN A KENYAN MOUNTAIN STREAM

    THE EFFECTS OF PHYSICAL DISTURBANCE ON <em>AFROPTILUM SUDAFRICANUM</em> (EPHEMEROPTERA: BAETIDAE) POPULATION DENSITIES IN A KENYAN MOUNTAIN STREAM

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The effects of physical disturbance on larval populations of the mayfly Afroptilum sudafricanum Lestage were examined in the Naro Morn River, Kenya. Disturbance was induced by stirring, shifting and relocating streambed substrates by hand. The method aimed to simulate natural...
  2. Influence of human disturbance on patterns of leaf herbivory at Gazi Bay mangrove forest, Kenya

    Influence of human disturbance on patterns of leaf herbivory at Gazi Bay mangrove forest, Kenya

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Mangrove herbivores cause leaf serration, perforation and galls prior to leaf abscission. This study compared damage by herbivores on leaves of four mangrove species at sites under different levels of human physical disturbance, and provides further evidence of the indirect...
  3. Response of endemic <em>Clarias</em> species’ life-history biometrics to land use around the papyrus-dominated Mpologoma riverine wetland, Uganda

    Response of endemic <em>Clarias</em> species’ life-history biometrics to land use around the papyrus-dominated Mpologoma riverine wetland, Uganda

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Mpologoma River wetland is highly negatively impacted by rice growing and yet it provides habitat to endemic Clarias species that are important to the wetland fishery. Variations in life-history biometrics of small Clarias species at various wetland sites in...
  4. Macroinvertebrate distributions in relation to human and animal-induced physical disturbance of the sediment surface in two Kenyan tropical Rift Valley streams

    Macroinvertebrate distributions in relation to human and animal-induced physical disturbance of the sediment surface in two Kenyan tropical Rift Valley streams

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A study of macroinvertebrate distribution in relation to different levels of human and animal physical disturbance of the sediments of the Njoro (highly disturbed) and Ellegirini (less disturbed) rivers was conducted from October 2001 to June 2002, and again in...
  5. Water and habitat quality assessment in the Honi and Naro Moru rivers, Kenya, using benthic macroinvertebrate assemblages and qualitative habitat scores

    Water and habitat quality assessment in the Honi and Naro Moru rivers, Kenya, using benthic macroinvertebrate assemblages and qualitative habitat scores

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    An assessment of water and habitat quality, based on macroinvertebrate assemblage indices and qualitative habitat scores (QHS), was undertaken in the Honi and Naro Moru rivers, Kenya, in 2011. The two rivers are important as water sources for the local...
  6. Does the exclusion of meiofauna affect the estimation of biotic indices using stream invertebrates?

    Does the exclusion of meiofauna affect the estimation of biotic indices using stream invertebrates?

    Item type: Journal Article • Journal: African Zoology
    Biomonitoring of rivers is usually undertaken using information based on macroinvertebrate assemblages. However, exclusion of meiofauna (i.e. invertebrates less than 0.5 mm in size) when sorting benthic invertebrates can affect the estimation of densities and other biotic indices. In the present...
  7. Effect of drift sampler exposure time and net mesh size on invertebrate drift density in the Njoro River, Kenya

    Effect of drift sampler exposure time and net mesh size on invertebrate drift density in the Njoro River, Kenya

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Although invertebrate drift is an important ecological process in lotic ecosystems, very little is known about it in Kenyan rivers. The primary aim of this study was to investigate the effect of driftnet mesh size and exposure duration on drift...