Search

Search results for

We found 4 results for you
  1. UTILIZATION OF PLANT MATERIALS BY JUVENILE AFRICAN CATFISH <em>(CLARIAS GARIEPINUS)</em> AND ITS IMPORTANCE IN FISH CULTURE

    UTILIZATION OF PLANT MATERIALS BY JUVENILE AFRICAN CATFISH (CLARIAS GARIEPINUS) AND ITS IMPORTANCE IN FISH CULTURE

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Douglas Clay --- Department of Agriculture, Zimbabwe
    Juvenile African catfish Clarias gariepinus between 100 and 200 mm total length from Lake McIlwaine, Zimbabwe are able to digest plant proteins. The digestibility of three major plant proteins (maize, sunflower seed and soya meal) was 30,0, 65,4 and 84,3%...
    View item »
  2. Age structure or functional response? Reconciling the energetics of surplus production between single-species models and ECOSIM

    Age structure or functional response? Reconciling the energetics of surplus production between single-species models and ECOSIM

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K. Y. Aydin
    Whole-ecosystem foodweb models, specifically the dynamic model ECOSIM, contain specific hypotheses for surplus production that differ from traditional single-species management models. Specifically, ECOSIM begins with an assumption that all species are tightly connected and energetic surplus does not arise through...
    View item »
  3. Shade tolerance and suitability of tree species for planting in rubber plantations

    Shade tolerance and suitability of tree species for planting in rubber plantations

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Yaohua Tian --- Yunnan Institute of Tropical Crops, China Huifang Yuan --- Yunnan Institute of Tropical Crops, China Jiang Xie --- Yunnan Institute of Tropical Crops, China Yulong Zheng --- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, China
    The rapid increase in rubber monoculture in Xishuangbanna has resulted in extensive damage to its local ecosystem. To decrease the negative effects, the concept of the ecological-economic rubber plantation (EERP) system was proposed. The EERP entails intercropping rubber plants with...
    View item »
  4. Is the largest African penguin colony in South Africa influencing local ocean productivity?

    Is the largest African penguin colony in South Africa influencing local ocean productivity?

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Passuni --- , South Africa LRD Human --- , South Africa SN Riddick --- , United States P Pattrick --- , South Africa M Bizani --- , South Africa SHP Deyzel --- , South Africa NA Strydom --- , South Africa TG Bornman --- , South Africa L Pichegru --- , South Africa
    In coastal waters, nutrient supplies originate principally from allochthonous sources, such as inputs from rivers, estuaries or oceanic waters. Recently, it has been suggested that marine life contributes to the nutrient load, with penguin colonies being the largest contributor worldwide...
    View item »