Sand structure construction in Uca lactea (De Haan, 1835) is related to tidal cycle but not to male or female densities
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概要
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Males of several species of fiddler crabs construct sand structures at the entrance of their burrows, to which they attract females for mating. Although sand structures are able to attract females, males do not always construct structures, and there is a considerable variation in the frequency of structure construction per day. To determine what factors cause the variation in the frequency of structure construction, I conducted a field observation on the structure construction of Uca lactea and examined the effects of air and soil temperatures, tidal amplitude, male and female densities, and the interaction between male and female densities. The frequency of structure construction was related to tidal amplitude. This may be a male response to the changing levels of female receptivity associated with the tidal cycle. The frequency of structure construction was also correlated positively with air temperature. Although courtship investment is expected to be influenced by the number of mates and rivals, neither male nor female density were significantly correlated with the frequency of structure construction.
論文 | ランダム
- 麻酔学(臨床医学の新しい動向 特集)
- サーモグラフィ(綜説)
- 電子計算機による線量計算-1- (癌・放射線療法) -- (放射線物理学および治療装置)
- 開発された新しい複合材料と温水器
- ミリ波帯線形,非線形導波路および機能性回路素子開発に関する研究 (別冊 第43回同志社大学理工学研究所研究発表会,2005年度同志社大学ハイテク・リサーチ,学術フロンティア合同シンポジウム講演予稿集〔含 当日配付資料〕)