Kuwait Journal of Science

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Volume :22 Issue : 2 1995      Add To Cart                                                                    Download

Food plants and energetics of the herbivorous lizard,



Plant resources of the herbivorous lizard, Uromastyx aegyptius microlepis, were quantified in a

sparsely vegetated Rhanterium community in eastern Kuwait. Standing crop biomass increased

from 0.5 g/m2 in the early growth season to a maximum of 2-3 g/m2 in late March and April.

The lizards consumed 15 species of annual and perennial plants. Biomass of the food plants was

approximately two-thirds to three-fourths of the total standing crop.

The daily energy expenditure of the lizards was estimated by two methods. Calculation based

on the standard metabolic rate at 40°C (Zari 1991) approximates a daily energy expenditure of

11.8 kcal for a 1 kg animal. According to Nagys relationship (1982) the daily energy cost would

be 13.4 kcal. The feeding rate to maintain energy balance would be 3.7 and 4.3 g (dry weight)

per day, respectively. Approximate feeding rates of dhubs in the Negev Desert are almost triple

this, suggesting that much of the annual energy requirement is acquired and stored during the

brief period of plant productivity.


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