Mechanisms of reproductive suppression in female pine voles (Microtus pinetorum).
Mechanisms of reproductive suppression in female pine voles (Microtus pinetorum).
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DOI：
10.1530/rep.0.1220297
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发表时间：
2001-08
期刊：
影响因子：
3.8
通讯作者：
N. Solomon;CL Brant;PA Callahan;B. Steinly
中科院分区：
文献类型：
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作者：
N. Solomon;CL Brant;PA Callahan;B. Steinly
在合作繁殖的鸟类和哺乳动物中，亲鸟雌性的生殖能力往往受到抑制。许多研究都集中在生殖抑制的功能意义，但需要进一步调查所涉及的机制，这一过程的完整理解。本研究调查了非生殖雌性松田鼠（Microtus pinetorum）的生殖抑制是否是由于配子成熟不足或LH缺乏增加而发生的。雄性松田鼠的行为也进行了检查，以确定他们是否表现出偏好的母亲与她的女儿，缺乏男性刺激可能会抑制LH的增加在女儿松田鼠。在有或没有父母的情况下，研究了与潜在配偶一起饲养的雌性动物的卵巢发育和循环LH浓度。配子的成熟不受父母存在的影响。在母亲在场的情况下，LH没有增加，正如在与新雄性动物一起饲养或暴露于新雄性动物的雌性动物中观察到的那样。雄性花更多的时间与母亲在一起，可能表现出与母亲交配的偏好。这些结果是一致的论点，即排卵不会发生在雌性松田鼠在其母亲的存在，然而，目前还不清楚是否缺乏排卵是由于缺乏刺激的男性或抑制由母亲。
In co-operatively breeding birds and mammals, philopatric females are often reproductively suppressed. Many studies have focused on the functional significance of reproductive suppression, but further investigation of the mechanisms involved is required for a complete understanding of this process. This study investigated whether reproductive suppression in non-reproductive female pine voles (Microtus pinetorum) occurs as a result of lack of gamete maturation or lack of increase in LH. The behaviour of male pine voles was also examined to determine whether they show a preference for the mother versus her daughter, as lack of male stimulation may inhibit an increase of LH in daughter pine voles. Ovarian development and circulating LH concentrations were investigated in females housed with a prospective mate in the presence or absence of a parent. Maturation of gametes was not affected by the presence of a parent. In the presence of the mother, there was no increase in LH, as was observed in females housed with or exposed to a novel male. Males spent more time with mothers and possibly showed a preference for mating with the mother. These results are consistent with the contention that ovulation does not occur in female pine voles housed in the presence of their mother; however, it is not clear whether the lack of ovulation is caused by lack of stimulation from the male or suppression by the mother.