DNA fingerprinting analysis of red deer (Cervus elaphus L., 1758) populations from Bulgaria

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• 作者：Tsenka G. Chassovnikarova ; G.G. Markov ; P. Mü ; ller
• 关键词：Cervus elaphus ; DNA fingerprinting ; genetic polymorphism
• 刊名：Mammalian Biology - Zeitschrift für Säugetierkunde
• 出版年：2003
• 出版时间：2003
• 年：2003
• 卷：68
• 期：6
• 页码：394-399
• 全文大小：209 K

文摘

Small mammal (<1 500 g) diversity and density were examined by grid trapping in four trapping sessions over a 2 year time period in a Belizean moist forest in Central America. During 10 829 trapnights, 96 individuals of 13 species were trapped. The 3 most common species, Marmosa mexicana, Heteromys desmarestianus and Ototylomys phyllotis accounted for 68 % of mammals (<200 g) captured, while Didelphis marsupialis dominated captures of mammals >200 g. Trap success increased with litter fall across grids. Trap success and density tended to be higher at the onset of the dry season. More females were breeding and more animals were in poor body condition at the onset of the wet season. Across studies using grid trapping in the neotropics, diversity and density were positively related to trapping effort. Despite this effect, small mammal densities at Las Cuevas were 2.7 per ha for mammals <200 g, among the lowest in the neotropics. Didelphis densities had a negative effect on densities of all other small mammals across studies; however, this relationship was driven largely by our study. A combination of poor soil, high Didelphis densities, and high predator densities is hypothesized for such low densities of small (<200 g) mammals in our study.