Páll Miklós K, Mayer Ian, Borg Bertil
Department of Zoology, Stockholm University, S-106 91, Sweden.
Horm Behav. 2002 Jun;41(4):377-83. doi: 10.1006/hbeh.2002.1777.
Circulating 11-ketotestosterone (11KT) levels are higher during the courtship phase than during the later parental phase in a number of male teleosts. The present study describes the temporal changes in 11KT levels and their relationships to changes in courtship behavior, after different number of spawnings, over the nesting cycle of the male three-spined stickleback, Gasterosteus aculeatus, a small teleost showing pronounced paternal behavior. Plasma 11KT levels, measured by radioimmunoassay, were approximately 34 times higher during the initial courtship phase than at the end of the following parental phase in spawned males. In addition, males that spawned with three or more females on a single day showed an earlier decline in 11KT levels and in courtship behavior compared to males that were only allowed to spawn with a single female. Plasma 11KT levels remained high in males not allowed to spawn.
在许多雄性硬骨鱼中，求偶期循环11 - 酮睾酮（11KT）水平高于后期育雏期。本研究描述了雄性三刺鱼（Gasterosteus aculeatus，一种表现出明显父性行为的小型硬骨鱼）在筑巢周期内不同产卵次数后11KT水平的时间变化及其与求偶行为变化的关系。通过放射免疫测定法测量，已产卵雄性在初始求偶期的血浆11KT水平比随后育雏期结束时高约34倍。此外，与仅与一只雌性交配的雄性相比，在一天内与三只或更多只雌性交配的雄性11KT水平和求偶行为的下降更早。未被允许产卵的雄性血浆11KT水平保持较高。
