Survival Under Conditions of Environmental Stress: Variability of Brain Morphology and Behavior in the House Mouse

Two populations of laboratory mice lived outdoors in open pens for two years. Thereafter, some of them were bred in the laboratory. Morphometric analysis showed that the size of the synaptic projection area of mossy fibers (in the CA3 region of the hippocampus), which has an important functional rol...

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Bibliographic Details
Published in:Russian journal of ecology 2001-05, Vol.32 (3), p.211-215
Main Authors: Poletaeva, I I, Pleskacheva, M G, Markina, N V, Perepelkina, O V, Shefferan, H, Wolfer, D P, Lipp, H-p
Format: Article
Language:English
Subjects:
Behavior
Environmental factors
Environmental stress
Fibers
Mus
Online Access:Get full text
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Summary:Two populations of laboratory mice lived outdoors in open pens for two years. Thereafter, some of them were bred in the laboratory. Morphometric analysis showed that the size of the synaptic projection area of mossy fibers (in the CA3 region of the hippocampus), which has an important functional role, and some behavioral traits of the open-pen mouse progeny had significant genetically determined differences from those in the initial population. This was attributed to differential breeding accounted for by the influence of severe environmental factors. Under environmental stress, selection occurred in the population and the mice with behavioral and neuromorphological characteristics differing from those of the control group proved to be better adapted to such conditions.[PUBLICATION ABSTRACT]
ISSN:1067-4136
1608-3334
DOI:10.1023/A:1011322513788