Comparison of Aggressive Behaviors Between Two Wild Populations of Japanese Medaka, Oryzias latipes and O-sakaizumii
Comparison of Aggressive Behaviors Between Two Wild Populations of Japanese Medaka, Oryzias latipes and O-sakaizumii
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DOI：
10.2108/zsj.31.116
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发表时间：
2014-03-01
影响因子：
0.9
通讯作者：
Kagawa, Nao
中科院分区：
文献类型：
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作者：
Kagawa, Nao
本研究比较了日本青鳉北方种群（Oryzias sakaizumii）和南方种群（O.拉丁人当四个男性在种群内竞争时，社会等级是根据两个种群中的攻击行为来确定的。南方种群的优势种表现出比北方种群的优势种更高的攻击行为。增加侵略性的南方男性相比，北方男性也观察到一对北方和南方男性进行比较，在人口间的比赛。精氨酸催产素（AVT）的高表达在不同的视前区被发现在南方人口的优势和下属，而不是在北方人口。相比之下，无论是11-酮睾酮，也不皮质醇水平在血浆中的差异占主导地位的和下属的人口，也不是对之间的北方和南方男性。两者合计，这些研究结果表明，这两个野生种群的青鳉鱼的神经内分泌相关的行为特征的青鳉鱼的同源物的研究代表有趣的模型。
This study compared aggressiveness between two distinct wild populations of Japanese medaka: a Northern population, Oryzias sakaizumii, and a Southern population, O. latipes. When four males competed in intra-population contests, the social hierarchy was determined based on aggressive acts in both populations. Dominants of the Southern population showed higher aggressive acts than did dominants of the Northern population. Increased aggressiveness of Southern males compared with Northern males was also observed when a pair of Northern and Southern males were compared in inter-population contests. High expression of arginine vasotocin (AVT) in distinct preoptic regions were found in dominants and subordinates of the Southern population, but not in those of the Northern population. In contrast, neither 11-ketotestosterone nor cortisol levels in plasma differed between dominants and subordinates of either population, nor between pairs of the Northern and the Southern males. Taken together, these findings indicate that the two wild populations of medaka represent intriguing models for the study of neuroendocrinological correlates in behavioral traits underlying congeners of medaka fish.