Demographic structure of small rodent populations from urban ecosystems of Chisinau city, Republic of Moldova
2014
Caraman, N., Academia de Stiinte a Moldovei, Chisinau (Republic of Moldova). Inst. de Zoologie | Nistreanu, V. | Larion, A.
The studies were performed in 2011-2012 in urban areas of the Chisinau city and in adjacent ecosystems. Thirteen rodent species were registered in the urban ecosystems during the research. The sex ratio of the rodent dominant species during the first half of 2011-2012 in most cases shows the prevalence of females, while males disperse in search of new territories and females for breeding. In the second half of the year, the sex ratio shows that females are more abundant in optimal habitats, while males disperse more actively. At the beginning of spring, rodent populations comprise only adult individuals, the majority being involved in reproduction process. Toward the end of spring, the proportion of subadult individuals reaches 10-30% from the species population number. During the summer period, the reproduction continues and subadults constitute 50%-70% of the small rodent population number toward autumn . The first pregnant females were registered in middle March; in April, first juvenile individuals were recorded and by the end of May, the individuals born in the current year were involved in the breeding process. Pregnant females were registered during the whole summer period in all rodent species and the breeding process continued till middle autumn.
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