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.
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References
Buffenstein R, Louw GN (1982) Temperature effects on bioenergetics of growth, assimilation efficiency and thyroid activity in juvenile varanid lizards. J. Therm. Biol 7:197–200
Cloudsley-Thompson JL (1971) The temperature and water relations of reptiles. Merrow, Watford Herts., England
Conover WJ (1980) Practical nonparametric statistics. 2 ed. John Wiley and Sons, New York
Dawson WR (1965) Interspecific variation in physiological responses of lizards to temperature. In: WW Milstead (ed), Lizard Ecology: a Symposium. University of Missouri Press, Columbia MO pp 230–257
Fitzsimons V (1953) A new genus of gerrhosaurid from Southern Angola. Ann Transvaal Mus 22(2):215–217
Hamilton WJ III, Coetzee CG (1969) Thermoregulatory behaviour of the vegetarian lizard Angolosaurus skoogi on the vegetationless northern Namib Desert dunes. Sci Pap Namib Desert Res Stn, no 47:95–103
Hamilton WJ III, Buskirk R, Buskirk WH (1977) Intersexual dominance and differential mortality of Gemsbok Oryx gazella at Namib Desert waterholes. Madoqua Ser II 10(1):5–19
Hansen RM (1974) Dietary of the chuckwalla, Sauromalus obesus, determined by dung analysis. Herpetologica 30(2):120–123
Hardy CJ, Hardy CM (1977) Tail regeneration and other observations in a species of agamid lizard. Aust Zool 19(2):141–148
Harris VA (1964) The life of the rainbow lizard. Hutchinson and Co Ltd, London
Hill MO (1973) Diversity and evenness: a unifying notation and its consequences. Ecology 54:427–432
Lancaster N (1982) Dunes on the Skeleton Coast, Namibia (South West Africa): geomorphology and grain size relationships. Earth Surface Processes Landforms 7:575–587
Lentner C (1981) (ed) Geigy Scientific Tables Vol 1, Units of Measurement, body fluids, composition of the body, nutrition. 8 Ed. Basle: Ciba-Geigy, pp 151–157
Louw GN, Holm E (1972) Physiological, morphological and behavioural adaptations of the ultrapsammophilous, Namib Desert lizard, Aporosaura anchietae (Bocage). Madoqua Ser II, 1:67–85
Louw GN, Seely MK (1982) Ecology of desert organisms. Longman, London
Mayhew WW (1968) Biology of desert amphibians and reptiles. In: Brown GW Jr (ed) Desert biology Vol 1, Academic Press, New York pp 195–356
Merker GP, Nagy KA (1984) Energy utilization by free-ranging Sceloporus virgatus lizards. Ecology 65(2):575–581
Mienis HK (1981) Land snails in faecal pellets of Agama stellio (Reptilia: Sauria: Agamidae). Salamandra 17(3–4):205–206
Nagy KA (1983) Ecological energetics. In: RB Huey, ER Pianka, TW Schoener (eds) Lizard ecology. Harvard University Press, Cambridge p 24–54
Ostrom JH (1963) Further comments on hervivorous lizards. Evolution 17:368–369
Pough FH (1973) Lizard energetics and diet. Ecology 54(4):837–844
Pough FH, Andrews RM (1985) Energy costs of subduing and swallowing prey for a lizard. Ecology 66(5):1525–1533
Ruppert RM (1980) Comparative assimilation efficiencies of two lizards. J Biochem Physiol 67(A):491–496
Seely MK (1983) Effective use of the desert dune environment as illustrated by the Namib tenebrionids. In: Lebrun P, Andre HM, Medts A de, Gregoire-Wibo C, Wanthy G (eds), New trends in soil biology. Dieu-Brichart, Louvain-la-Neuve, Belgium pp 357–368
Sokal RR, Rohlf FJ (1981) Biometry. 2 ed. WH Freeman and Co., San Francisco
Sokol OM (1965) Herbivory in lizards. Evolution 21:192–194
Steyn W (1963) Angolosaurus skoogi (Andersson)—a new record from South West Africa. Cimbebasia, no. 6:8–11
Szarski H (1962) Some remarks on herbivorous lizards. Evolution 16:529
Ulmer H-V (1983) Nutrition. In: Schmidt RF, Thews H (eds), Human Physiology. Springer, Berlin pp 573–586
Walls GY (1981) Feeding ecology of the tuartara (Sphenodon punctatus) on Stephens Island Cook Strait. N Z J Ecol 4:89–97
Wilson KJ, Lee AK (1974) Energy expenditure of a large herbivorous lizard. Copeia 1974:338–348
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Pietruszka, R.D., Hanrahan, S.A., Mitchell, D. et al. Lizard herbivory in a sand dune environment: the diet of Angolosaurus skoogi . Oecologia 70, 587–591 (1986). https://doi.org/10.1007/BF00379909
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DOI: https://doi.org/10.1007/BF00379909