Mating behavior and methyl farnesoate levels in male morphotypes of the spider crab, Libinia emarginata (Leach)
Mating behavior and methyl farnesoate levels in male morphotypes of the spider crab, Libinia emarginata (Leach)
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DOI：
10.1016/0022-0981(95)00107-7
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发表时间：
1995-11-29
影响因子：
2
通讯作者：
Ahl, JSB
中科院分区：
文献类型：
--
作者：
Laufer, H;Ahl, JSB
目前，我们在 Libinia emarginata 中至少发现了六种雄性形态类型，它们的外观和繁殖行为各不相同。初级繁殖体有一个大的甲壳、大的爪子，它们的外骨骼外表皮被磨损，使它们呈现出“磨损”的外观。这些动物还具有较高的生殖系统指数 (RI) 和较高的法呢酸甲酯 (MF) 血液水平。体型较小、爪子较短、磨损严重的雄性不会与体型较大且具有攻击性的雄性竞争，而是采用“偷偷交配”和模仿雌性等替代策略。他们的血液中也有大量的 RI 和高水平的 MF。任何大小的未磨损的变形体都不会尝试交配。它们的 MF 水平较低（通常是受擦伤雄性的一半），RI 也较低，表明它们处于生殖滞育状态。不完全磨损的雄性具有中等水平的 MF，并且会在没有大爪磨损的雄性的情况下尝试交配。行为和激素水平之间的这种关系表明，MF 可能参与确定不同雄性形态类型所表现出的交配行为类型。
We presently recognize at least six male morphotypes in Libinia emarginata which differ with respect to their appearance and reproductive behavior. The primary reproductives have a large carapace, large claws and their exoskeletal epicuticle is worn away, giving them an ''abraded'' appearance. These animals also have large reproductive system indices (RI), and high methyl farnesoate (MF) blood levels. Smaller abraded males with short claws do not compete with the larger aggressive ones, but employ alternative tactics such as ''sneak mating'' and female mimicry. They also have large RIs and high levels of MF in their blood. Unabraded morphs of any size do not attempt to mate. Their MF levels are lower (usually one half that of the abraded males) as are their RIs, suggesting that they are in a state of reproductive diapause. Incompletely abraded males have intermediate levels of MF and will attempt mating in the absence of the large-claw abraded ones. This relationship between behavior and hormone level suggests that MF may be involved in determining the type of mating behavior displayed by the different male morphotypes.