Effects of male size and mate quality on male-male contest in the hermit crab Pagurus filholi
Effects of male size and mate quality on male-male contest in the hermit crab Pagurus filholi
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雄性体型和交配质量对寄居蟹雄性竞争的影响
DOI：
10.5179/benthos.67.15
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发表时间：
2012
影响因子：
0.6
通讯作者：
S. Wada
中科院分区：
文献类型：
--
作者：
D. Tanikawa;Chiaki I. Yasuda;Yutaro Suzuki;S. Wada
雄寄居蟹守护雌寄居蟹直到产卵，当守护雌寄居蟹的雄寄居蟹遇到其他雄寄居蟹时，雄寄居蟹之间经常发生竞争。比赛包括两个阶段，最初的接触和身体对抗，体型较大的雄性通常获胜。我们进行了雄性-雄性竞赛实验，以研究雄性和雌性的体型大小和接受度是否会影响竞赛是否和何时升级为身体对抗，以及竞赛的持续时间和结果。在每次试验中，将一对“配对雄性”和一对“配对雌性”以及另一只雄性（“入侵者”）放入一个小容器中，观察它们的行为15分钟。每个闯入者都在野外看守着一只雌性，但我们在试验前把这只雌性移走了。试验结束后，对野外的所有配对进行重建，以量化雌性的接受度。这是通过每天检查每只雌性的产卵情况来完成的。作为大小指标，我们测量了所有螃蟹的盾长（钙化的头胸前部的长度）。在试验中，入侵者的大尺寸和被移走的雌性的高接受性显著缩短了距离身体战斗开始的时间。入侵者需要更多的时间来接管配对的雌性，当入侵者很小，配对的雄性很大，而被移除的雌性很大时，他们不太可能赢得比赛。配对雌性的体型和接受度对雄雄竞争的过程和结果没有影响。这些结果表明，雄性菲氏假单胞虫可以评估其所保护的雌性的质量，并至少在短时间内记住这一评估。雌性品质记忆库中竞争者之间的不对称可能影响雄性与雄性竞争的过程和结果。
Males of the hermit crab Pagurus filholi guard females until spawning, and male-male contest often occur when guarding males encounter other males. A contest comprises two phases, initial contact and physical combat, and larger males typically win. We conducted male-male contest experiments to examine whether body sizes of both sexes of P. filholi and female receptivity affect whether and when a contest escalates to physical combat, as well as contest duration and outcome. For each experimental trial, a pair, comprising a “pairing male” and a “pairing female”, and a second male (“intruder”) were placed into a small container, and their behaviors were observed for 15 minutes. Each intruder had been guarding a female in the field but we removed this female (“removed female”) just before the trial. All pairs in the field were reconstructed each after trial to quantify female receptivity. This was done by checking each female for spawning every day. As an index of size, we measured shield length (length of calcified anterior portion of cephalothorax) of all crabs. In the trials, large size of the intruder and high receptivity of the removed female significantly shortened the time until the onset of physical combat. Intruders needed more time to take over the pairing females and were less likely to win the contests when the intruders were small, the pairing males were large, and the removed females were large. Body size and receptivity of the pairing female had no effect on the process and the outcome of male-male contest. These results suggest that a male P. filholi can assess the quality of female it is guarding and remember its assessment for at least a short period. Asymmetry between contestants in this memory store for female quality could affect the process and the outcome of male-male contests in P. filholi.
寄居蟹的雄性择偶：低等雄性的谨慎性和高等雄性的简单偏好。
影响因子：
2.4
作者：
Satoshi Wada;Yuusei Arashiro;Fumio Takeshita;Yasutoki Shibata
通讯作者：
Yasutoki Shibata
影响因子：
2.5
作者：
Yukiya Kitayama;Kazuya Kishida;Hirotaka Moribe;Masayoshi Okubo;Chiaki Yasuda・Fumio Takeshita・Satoshi Wada
通讯作者：
Chiaki Yasuda・Fumio Takeshita・Satoshi Wada
寄居蟹 Pagurus filholi（十足目：Anomura：寄居蟹科）的体型选型交配
DOI：
--
发表时间：
2006
期刊：
Crustacean Research Special Issue 6
影响因子：
--
作者：
Goshima;S.;S.Minouchi;K.Yoshino;S.Wada
通讯作者：
S.Wada