Desynchronising male and female reproductive seasonality: dynamics of male MHC-independent olfactory attractiveness in sticklebacks
Desynchronising male and female reproductive seasonality: dynamics of male MHC-independent olfactory attractiveness in sticklebacks
复制标题
雄性和雌性生殖季节性不同步：刺鱼中雄性 MHC 独立嗅觉吸引力的动态
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Milinski
中科院分区：
文献类型：
--
作者：
R. Sommerfeld;T. Boehm;M. Milinski
嗅觉信号在三刺鱼的择偶过程中起着重要的作用。研究表明，女性在选择时会考虑男性的MHC基因组成;然而，高度多样化的MHC似乎不太可能表明男性的生殖状况。我们通过不同的季节（冬季到夏季）和生殖条件（非筑巢，筑巢，不再筑巢），并测量了他们的嗅觉吸引力的女性独立的嗅觉MHC信号的17个单独的男性长达17周。在整个实验过程中，我们通过将雌性的季节性与雄性的季节性区分开来，使雌性的选择水平保持不变。我们的研究结果证实，MHC信号本身是不足以引起任何女性的反应，它需要一个额外的嗅觉线索。我们在这里表明，这一额外的线索，使男性非常有吸引力的巢维护。一旦巢穴被遗弃，这种吸引力就会显著下降。我们讨论这种信息素的可能候选人。
Olfactory cues play an important role in the process of mate choice in the three-spined stickleback. It has been shown that females take the MHC-genetic make-up of males into account for their choice; however, it seems unlikely that the highly diverse MHC can signal the reproductive condition of the male. We followed 17 individual males for up to 17 weeks through different seasons (winter to summer) and reproductive conditions (non-nesting, nesting, no longer nesting) and measured their olfactory attractiveness for females independent of the olfactory MHC signal. We kept the level of female choice constant throughout the experiment by desynchronising their seasonality from that of the males. Our results confirm that the MHC signal by itself is not sufficient to elicit any female response; it needs an additional olfactory cue. We show here that this additional cue renders males highly attractive during nest maintenance. This attractiveness drops significantly as soon as the nest is abandoned. We discuss possible candidates for this pheromone.