Seasonal variability of the hippocampus architectonics in bank vole (Clethrionomys glareolus, Rodentia)
Abstract
The seasonal and age variability of the hippocampus of the bank vole (Clethrionomys glareolus) from the natural population (Moscow region) was traced. The animals of the autumn generation were compared at three stages of the life cycle: in the fall (1-3 months old), during the winter decrease in brain mass (5-7 months), after the spring «growth spurt» (9-11 months). The winter sample differed statistically significantly smaller (p<0,05) section area of both the dentate gyrus and the CA3 field of the hippocampus. All the studied divisions of the hippocampal complex - molecular and granular layers of the dentate gyrus, layers of pyramidal cells and fibers of the CA3 field of the hippocampus were characterized by a similar winter decrease (9,4-13,3%). In spring, there was a regrowth in all parts of the hippocampal complex. In the summertime in overwintered voles, the size of the hippocampal divisions was larger than that in the winter sample by 5,4-27,3%. The results indicate a significant morphological plasticity of the main structural components of the hippocampus due to the influence of seasonal factors in non-winter-sleeping rodents.
About the Author
V. A. Yaskin
Department of Vertebrate Zoology, School of Biology.
Leninskiye gory 1—12, Moscow, 119134
Russian Federation
Russian Federation
Lomonosov Moscow State University
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For citations:
Yaskin V.A. Seasonal variability of the hippocampus architectonics in bank vole (Clethrionomys glareolus, Rodentia). Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2019;74(2):129–134. (In Russ.)
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