POPULATION STUDIES ON GERBILS OF THE WESTERN DESERT OF EGYPT, WITH SPECIAL REFERENCE TO Gerbillus andersoni DE WINTON
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منابع مشابه
Does interspecific competition from congeners cause the scarcity of Gerbillus henleyi in productive sandy desert habitats?
1. We tested the hypothesis that Gerbillus henleyi (de Winton 1903), the smallest species (10 g) of a pssamophilic guild in Israel, is scarce on relatively productive dunes of the Israeli desert, due to negative interactions from the common G. allenby i (Thomas 1918) and G. pyramidum (Geoffroy 1825). 2. The alternative hypothesis was that scarcity on sand resulted from the size of its naked hin...
متن کاملPhotoperiodic responses of four wild-trapped desert rodent species.
The purpose of this study was to examine the effect of the photoperiod on reproductive status and body and lipid masses in four Egyptian desert rodent species ( Dipodillus dasyurus, Acomys cahirinus, Gerbillus andersoni, and Gerbillus pyramidum). Adult males and females were housed in long days for 11 wk. At that time, one-half of the animals were killed and the remaining animals were moved to ...
متن کاملCytochrome b shows signs of adaptive protein evolution in Gerbillus species from Egypt
Background: Amino acid polymorphisms in the mitochondrial cytochrome b (cytb) gene of four Gerbillus species have been investigated for their geographical distribution and possible functional significance. The sequences were obtained from a total of 20 specimens representing four species of genus Gerbillus collected from Siwa Oasis, Dabaa, Wadi El Natron, El Faiyum, and Baltim in Egypt. Results...
متن کاملNOTE / NOTE New observations on urine contents in water- deprived Negev Desert rodents
In past studies, several rodent species of the murid subfamilies Gerbillinae and Cricetomyinae from the Namib Desert, when deprived of water, excreted allantoin precipitate in their urine. Shifting nitrogen excretion from urea to allantoin allows them to save much water. This phenomenon has not been reported in other rodents, and whether it is a trait that is common among desert rodents, but un...
متن کاملBehavioural Ecology
We examined gender-dependent competitive interactions between two nocturnal desert gerbil species, Gerbillus andersoni allenbyi and G. pyramidum, by a field manipulation experiment. The study was done in two 1ha enclosed plots and included allopatric (only G. a. allenbyi) and sympatric (both species together) treatments. Seed trays and thermal imaging cameras were used to observe the gerbils’ f...
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تاریخ انتشار 2017