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Influence of additional mates on social behavior of Brandt's vole (Microtus brandti)



Influence of additional mates on social behavior of Brandt's vole (Microtus brandti)



Acta Zoologica Sinica 49(4): 432-437



The influence of additional mates on the social behavior of Brandt's vole was studied. A total of 6 treatments were set up, control treatment (1[male]+1&[integral]e), additional female treatments (1[male]+2&[integral]e and 1[male]+3&[integral]e), additional male treatments (2[male]+1&[integral]e and 3[male]+1&[integral]e) and an additional male and female treatment (2[male]+2&[integral]e). Each treatment had 10 replicates. The non-agnostic and agnostic behavior of the voles were observed for ten minutes in an observation box which was made by placing two boxes together (each box was 37 cmx27 cmx17 cm). The results were: compared to the control, the frequency of non-agnostic behavior decreased while the frequency of agnostic behavior increased in all treatments. Increasing the number of mates changed the operational sex ratio and increased density. Correlation analysis of parameters of social behavior with operational sex ratio and density showed that density was the main influence on the social behavior of Brandt's vole. At high density, the frequency of agnostic behavior increases while the frequency of non-agnostic behavior decreases. This suggests that increasing mating partners should increase the intensity of competition as a consequence of increasing the vole's density.

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Accession: 010836884

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