The vibrational signals that male fiddler crabs (Uca lactea) use to attract females into their burrows
The vibrational signals that male fiddler crabs (Uca lactea) use to attract females into their burrows
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雄性招潮蟹（Ucalactea）利用振动信号吸引雌性进入其洞穴
DOI：
10.1007/s00114-016-1371-2
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Minoru Murai
中科院分区：
文献类型：
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作者：
Fumio Takeshita;Minoru Murai
在一些招潮蟹物种中，雄性在用挥舞的展示吸引雌性到洞穴入口后，会从洞穴向寻找配偶的雌性发出振动。虽然振动被认为是诱导交配的声音信号，但还没有证明振动是否会吸引雌性进入洞穴，从而影响雌性的交配决定。我们调查的结构和模式的振动使用一个假的女性和实验证明了女性的偏好男性振动inucalacteain领域。声信号由重复的脉冲组成。脉冲的优势频率随着雄虫背甲宽度的增加而降低。随着振动重复次数的增加，脉冲长度略有下降，并且脉冲间隔随着重复次数的增加而增加。这些因素意味着振动传达了男性特征的信息，如身体大小和耐力。在雌性择偶实验中，当雄性个体位于洞穴入口时，雌性个体显著偏好脉冲重复频率较高的雄性个体，表明雌性个体利用雄性个体的振动信号来决定是否进入洞穴。然而，一旦进入洞穴，雌性就不会对振动产生偏好，它们是否决定交配，这表明振动并不能独立地影响雌性的最终择偶决定。洞穴内的振动可能会影响女性的决定，通过与其他男性特征，如洞穴结构的相互作用。
In some fiddler crab species, males emit vibrations from their burrows to mate-searching females after they have attracted a female to the burrow entrance using a waving display. Although the vibrations are considered acoustic signals to induce mating, it has not been demonstrated whether the vibrations attract the females into the burrow and, consequently, influence females’ mating decisions. We investigated the structures and patterns of the vibrations using a dummy female and demonstrated experimentally a female preference for male vibrations inUca lacteain the field. The acoustic signals consisted of repetitions of pulses. The dominant frequency of the pulses decreased with male carapace width. The pulse length decreased slightly with an increasing number of vibrational repetitions, and the pulse interval increased with increasing repetitions. These factors imply that the vibrations convey information on male characteristics, such as body size and stamina. In the experiment on female mate choice, the females significantly preferred males with higher pulse repetition rates when they were positioned at the entrance of the burrow, indicating that the females use the male vibrational signals to decide whether to enter the burrow. However, females showed no preference for the vibrations once they were inside a burrow, i.e., whether they decided to copulate, suggesting that the vibrations do not independently affect a female’s final decision of mate choice. The vibrations inside the burrow might influence a female’s decision by interaction with other male traits such as the burrow structure.