SOCIAL-CONTROL OF NEURONAL SOMA SIZE
SOCIAL-CONTROL OF NEURONAL SOMA SIZE
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DOI：
10.1002/neu.480210804
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发表时间：
1990-12-01
期刊：
影响因子：
--
通讯作者：
FERNALD, RD
中科院分区：
文献类型：
--
作者：
DAVIS, MR;FERNALD, RD
脊椎动物性成熟的因素在不同物种之间有很大差异。在许多情况下，年龄是最重要的，而在其他情况下，季节或社会线索起着核心作用。在这里，我们报告说，成熟的非洲慈鲷鱼Haplochromis burtoni是社会控制，这种控制包括调节索马生长在一个人口的视前神经元免疫反应促性腺激素释放激素（irGnRH）。在水族馆中饲养的同龄鱼中的雄性在大约3个月内性成熟，而在年龄较大，更具侵略性的同种存在下饲养的雄性即使在5个月大时仍然不成熟。未成熟的男性显示性腺功能减退症，并有显着的视前irGnRH神经元相比，同龄的成熟兄弟姐妹。这种可变的成熟率增加了个体雄性存活到可以成功繁殖的年龄的可能性。
Factors responsible for sexual maturation differ significantly among vertebrate species. In many, age is most important, whereas in others seasonal or social cues play a central role. Here we report that maturation in the African cichlid fish Haplochromis burtoni is socially controlled, and that this control includes regulation of soma growth in a population of preoptic neurons immunoreactive to gonadotropin-releasing hormone (irGnRH). Males reared in aquaria among fish of the same age mature sexually in about 3 months, whereas males reared in the presence of older, more aggressive conspecifics remain immature even at 5 months of age. Immature males display hypogonadism and have conspicuously undersized preoptic irGnRH neurons in comparison to those of mature siblings of the same age. This variable maturation rate increases the likelihood that individual males will survive to an age when they can successfully reproduce.