科研之友
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摘要
The dynamics of the corticosterone content in feces of males were analyzed in red (M. rutilis), grey-sided (M. rufocanus), and bank (M glareolus voles. The ontogenetic dynamics of the corticosterone content in feces of these species collected on the 20 and 40th days were shown to depend differently on the month of their birth. At the same time, the fecal corticosterone content was similar in males of all species originated from the litters with different size and share of males in it. The fecal corticosterone content in the 40-day-old animals was related to the month of birth for all three species. The species-specific features of the adrenal activity were found in 20 and 40 days after birth of animals. The males of the May and August generations had the highest corticosterone level in feces. The fecal corticosterone content in the red vole males also correlated with social surrounding; in addition, the socially isolated single males had a higher rate of maturation. The fecal corticosterone in the grey-sided vole males related to the season of start maturation and to the date of birth negatively correlated with sexual maturation. The mature males of those species were found only among the spring-early summer generation. Thus, population factors were important only for the maturing males that were born in the current year. Moreover, the sexual maturation at the high population density is accompanied by a lower decrease in the adrenocortical activity.
- 出版日期2016-4
