SEASONAL ADAPTIVE MODIFICATION OF THE HIPPOCAMPUS AND DYNAMICS OF SPATIAL BEHAVIOR IN BANK VOLES (CLETHRIONOMYS GLAREOLUS, RODENTIA)статья
Статья опубликована в журнале из списка RSCI Web of Science
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Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The hippocampus is involved into the processing of spatial information on the environment, and its size is known to correlate positively with the spatial ability of mammal and bird species. The aim of the study was to find out whether such regularity is also manifested in ontogenesis during seasonal dynamics of the spatial behavior typical for many small mammals. A comparative study of seasonal and age dynamics of the hippocampus size and spatial behavior in bank voles (Clethrionomys glareolus) from natural populations was carried out. Analysis of the histograms on the variation of the hippocampus size revealed in the autumn-winter period showed the existence of involution of this brain division in animals. The winter reduction in the hippocampus size (-10%) coincided with the shrinkage of the animal's home ranges. During the winter-to-summer period, the greatest increase was observed in the hippocampus (+23%) as compared to the brain divisions. This growth gain of the hippocampus mass coincided with the spring increase in their home ranges and mobility. During the seasonal dynamics, a strong positive correlation was found between the hippocampus mass and the home range size and the mobility of voles. The seasonal adaptive modification of the hippocampus size along with cyclic changes in the spatial behavior occurring in the animal ontogenesis was revealed.