年轻雄性地中海实蝇的高性信号传递率预示着更长的寿命。
High sexual signalling rates of young individuals predict extended life span in male Mediterranean fruit flies.
作者信息
Papadopoulos Nikos T, Katsoyannos Byron I, Kouloussis Nikos A, Carey James R, Müller Hans-Georg, Zhang Ying
机构信息
Department of Agriculture, Laboratory of Applied Zoology and Parasitology, Aristotle University of Thessaloniki, 540 06 Thessaloniki, Greece.
出版信息
Oecologia. 2004 Jan;138(1):127-34. doi: 10.1007/s00442-003-1392-3. Epub 2003 Oct 24.
In a laboratory study, we monitored the lifetime sexual signalling (advertisement) of wild male Mediterranean fruit flies, and we tested the hypothesis that high lifetime intensity of sexual signalling indicates high survival probabilities. Almost all males exhibited signalling and individual signalling rates were highly variable from the beginning of the adults' maturity and throughout their life span (average life span 62.3 days). Sexual signalling rates after day 10 (peak maturity) were consistently high until about 1 week before death. There was a positive relationship between daily signalling rates and life span, and an increase in signalling level by one unit over all times was associated with an approximately 50% decrease in mortality rate. Signalling rates early in adult life (day 6-20) were higher in the longest-lived than in the shortest-lived flies. These results support the hypothesis that intense sexual signalling indicates longer life span. We discuss the importance of age-specific behavioural studies for understanding the evolution of male life histories.
在一项实验室研究中，我们监测了野生雄性地中海果蝇一生的性信号（求偶信号），并检验了以下假设：一生高强度的性信号表明高生存概率。几乎所有雄性都表现出信号，且从成虫成熟开始直至整个寿命期（平均寿命62.3天），个体信号率都高度可变。第10天（成熟高峰期）之后的性信号率一直很高，直到死亡前约1周。每日信号率与寿命之间存在正相关关系，在所有时间内信号水平每增加一个单位，死亡率就会降低约50%。寿命最长的果蝇在成年早期（第6 - 20天）的信号率高于寿命最短的果蝇。这些结果支持了高强度性信号表明更长寿命的假设。我们讨论了特定年龄行为研究对于理解雄性生活史进化的重要性。
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