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  • 1
    Digitale Medien
    Digitale Medien
    Aspects of the biology of Tilapia mossambica Peters (Pisces: Cichlidae) in a natural freshwater lake (Lake Sibaya, South Africa) (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 7 (1975), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: An account is given of some aspects of the biology of Tilapia mossambica Peters in Lake Sibaya, South Africa. Lake Sibaya is a warm shallow coastal lake with extensive shallow terraces in the littoral which shelve abruptly into underwater valleys. The substrate is predominantly sandy. Aquatic macrophytes are generally restricted to water 1–7 m deep. Adult fishes (over 8 cm standard length) are usually absent from water deeper than 12m and shallower than 0–5 m, whereas juveniles may occur at all depths, and fry only in very shallow water. T. mossambica inhabits the littoral and sublittoral in the warm and transition periods (August–April) but moves into deep water in the cool season (May–July). Exposed and sheltered areas are utilized for different purposes by adult fishes, the former for nesting, and latter for feeding and mouth–brooding. Habitat selection by males is governed by the availability of suitable nest sites. Nests are most common in sparsely–vegetated sheltered areas. Brooding females preferred sheltered littoral areas but ventured onto the terrace to release the fry. Juveniles and fry inhabited exposed shores with a temperature gradient which reversed diurnally. The breeding, shoaling and feeding behaviour is described. The biology of T. mossambica in Lake Sibaya is compared to data on the same, and similar species, in other systems. The utilization of available resources in the lake by T. mossambica is discussed and reference is made to the importance of the retention of generalized characters for the successful habitation of the cyclically–renewed habitat of the littoral.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1975.tb04618.x
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  • 2
    Digitale Medien
    Digitale Medien
    Antennary Feeding of the Hermit Crab Diogenes brevirostris Stimpson (1961)
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 1099-1100 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Diogenes brevirostris Stimpson usually feeds by scraping debris towards the third maxillipeds with the second and third walking legs, and the small chela. The material is picked up by the endopods of the third maxillipeds, scrubbed between the brushes of the propus, dactylus and merus, and then ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1921099a0
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  • 3
    Digitale Medien
    Digitale Medien
    An Estuarine Fauna in a Freshwater Lake in South Africa (1966)
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 532-533 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A normal freshwater fauna was found, as typified by chironomids, oligochaetes, fresh water pulmonates (Bulinus, Biomphalaria, Lymnaea) and the prosobranch Melanoides, freshwater fish (Clarias), mayflies, Odonata, belostomatids, dybiscids and hydrophyllids. In addition there is a typical estuarine ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/209532a0
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  • 4
    Digitale Medien
    Digitale Medien
    The functional anatomy of the head of the puff adder, Bitis arietans (Merr.) (1964)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 114 (1964), S. 83-105 
    Details
    ISSN: 0362-2525
    Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Medizin
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jmor.1051140105
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