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首页> 外文期刊>Zoological Science >Plasma Testosterone Levels Increase with Expression of Male Ornaments During Mating, but not Incubation, in Japanese Barn Swallows
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Plasma Testosterone Levels Increase with Expression of Male Ornaments During Mating, but not Incubation, in Japanese Barn Swallows

机译：血浆睾酮水平随着雄性饰物的表达而增加，但不孵化，在日本谷仓燕子中

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摘要

Recent experimental studies involving the manipulation of sexual traits have demonstrated that sexual trait expression feeds back to testosterone levels, perhaps via social interactions, reinforcing the linkage between sexual trait expression and testosterone levels during the mating period. However, information on this reinforcement under the natural variation of sexual traits remains limited. Using Japanese barn swallows, Hirundo rustica gutturalis, in which extra-pair paternity is quite rare (< 3%), we studied the relationship between plasma testosterone level and a male sexual trait, throat patch size, during the mating and incubation periods. Given the importance of social interaction, we predicted that this relationship should be intense during the mating period, but not the incubation period, due to reduced social interaction during the latter. We found low plasma testosterone levels during the incubation period compared with those in the mating period, and plasma testosterone levels were significantly positively related to throat patch area during the mating period, but not the incubation period. Similar relationships were found in another sexual trait, the size of white tail spots. During the incubation period, body condition, instead of male sexual trait expression, was negatively related to plasma testosterone level, indicating that an intrinsic link, rather than reinforcement, is important during this period. These relationships are consistent with the hypothesis that social interaction reinforces the relationship between sexual traits and plasma testosterone levels. The current study provides evidence for a highly variable relationship between testosterone and ornamentation across breeding periods in the natural variation of sexual traits.
机译：涉及操纵性状性状的最新实验研究已经证明，性状表达可能通过社交相互作用喂回睾酮水平，可能在交配期间加强性状表达和睾酮水平之间的连锁。但是，关于这种性状自然变异下这种加强的信息仍然有限。使用日本谷仓燕子，Hirundo Rustica Gutturalis，其中额外对亲子度相当罕见（<3％），我们研究了血浆睾酮水平与男性性状之间的关系，在交配和潜伏期间。鉴于社会互动的重要性，我们预测，由于在后者期间的社会互动减少，这种关系应该是激烈的，但不是潜伏期。我们发现与配合时期的孵育期间的低血浆睾酮水平，并且在配合时期期间与咽喉蛋白面积显着呈正显着呈正显着相关，但不是孵育期。在另一种性状中发现了类似的关系，白尾斑的大小。在潜伏期期间，体质状况，代替男性性状表达，与血浆睾酮水平负相关，表明在此期间内部连杆而不是加固，是重要的。这些关系与社会互动增强了性状和血浆睾酮水平之间关系的假设一致。目前的研究提供了在性状自然变化中培育期睾酮和装饰之间的高度可变关系的证据。

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