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  • Lizard  (1)
  • Tenebrionidae  (1)
  • sex ratio  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Lizard herbivory in a sand dune environment: the diet of Angolosaurus skoogi (1986)
    Springer
    Oecologia 70 (1986), S. 587-591 
    Details
    ISSN: 1432-1939
    Keywords: Sand dune ; Lizard ; Herbivory ; Fecal analysis ; Angolosaurus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Early observations of the feeding habits of Angolosaurus skoogi (Andersson), a 50–120 g lizard inhabiting the almost vegetationless dunes of the northern Namib Desert, indicated that this species was herbivorous. Less than two percent of living lizard species are predominantly herbivorous and these species tend to have a high body mass (〉100 g). We therefore analysed fecal pellets of A. skoogi to obtain dietary details of this relatively rare lizard. Eighteen food taxa were identified: 81 percent by mass was composed of vegetable matter, of which 56 percent was an endemic, perennial cucurbit Acanthosicyos horrida. Both spatial and temporal variation in dietary composition were apparent. Ready access to water in the form of A. horrida is postulated to have allowed Angolosaurus to occupy this extreme habitat and to forage on components of the windblown detritus, a food source that would probably not be usable in other circumstances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379909
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  • 2
    Electronic Resource
    Electronic Resource
    The reproductive behavior of six species of Namib desert tenebrionid beetles (Coleoptera: Tenebrionidae) (1991)
    Springer
    Journal of insect behavior 4 (1991), S. 567-582 
    Details
    ISSN: 1572-8889
    Keywords: mate guarding ; mating behavior ; pair duration ; sex ratio ; Tenebrionidae ; Physadesmia ; Onymacris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The reproductive behavior of six species of tenebrionid beetles (Coleoptera: Tenebrionidae) was studied in the Namib Desert of southern Africa. In three species, males follow closely behind females (following behavior), while in the other three species, males mount females and remain clasped to them for extended periods (riding behavior). Following behavior occurs before and sometimes after copulation, while riding behavior occurs primarily after copulation. Males of all six species guard females from contesting males, although the effectiveness of guarding is greater in riding species. The evolution of the two male mating strategies does not appear to be related to operational sex ratio differences but, rather, to differential tendencies of females to remate. Variation in total pair duration within following and riding species may be attributed partly to species differences in operational sex ratio. However, pair durations are not affected by experimental manipulations of sex ratio in each species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048071
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    Paper (German National Licenses)
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