|| 要旨トップ | 目次 |||日本生態学会第63回全国大会 (2016年3月、仙台) 講演要旨
一般講演（口頭発表） E2-29 (Oral presentation)
Males have evolved various strategies to gain access to females. Generally, each mating strategy matches the specific habitat of the population. However, little is known about how males inhabiting the harsh thermal conditions seek out their mates. The male desert locust was observed to form leks on the ground, despite the ground temperatures exceeding 60oC, which is above their lethal limit (55℃). Gravid females entered there, whereupon they rapidly mated and oviposit. Male-male competition is intense in these “mating/oviposition grounds”, with fights over the relatively few numbers of females available (female:male ratios at the mating grounds can be as low as 1:85). Virtually most incoming females carried mature oocytes and were ready for oviposition. Males quickly mated with any female coming in, and mate-guarded them during the egg-laying period, thus assuring their paternity. During mid-day, some males tended to remain in the shade. However, the remainder oriented themselves parallel to the sun’s rays to minimize the exposure of their body surface, and lift their body to prevent overheating. Flying females usually land on the bare ground; therefore, the visually mate-searching males remained there incurring the risk of mortality could increase their mating chances.