潮汐にさらされない環境下における幼生放出活動の潮汐タイミング

概要

論文の詳細を見る
SAIGUSA, M. (Coll. Liberal Arts & Sciences, Okayama Univ., Okayama) 1985. Tidal timing of larval release activity in non-tidal environment. Jap. J Ecol., 35 : 243-251. The larval release rhythm of the terrestrial crab, Sesarma haematocheir, shows a different strength in the tidal component between Izu (Shizuoka Prefecture) and Kasaoka (Okayama Prefecture) populations. To determine whether this difference is under the direct influence of tides or based on the pattern specific to each local population, comparative studies of the larval release patterns of a certain population under different tidal influences should be available. Field observations were thus carried out at a tributary in the Izu peninsula where the water level was completely uninfluenced by tides. Comparison of the data with those of previous studies made at other sites in the Izu peninsula indicated that the Izu population exhibited the same larval release pattern in these sites. This suggests that the different strengths of tidal component between the Izu and Kasaoka population patterns are specific to each population. Accordingly, tide-correlated factors contributing to the different strengths of that component in both populations are discussed. This paper discusses two possible explanations for the tidal zeitgeber which controls the expression of the tidal component.
日本生態学会の論文
1985-06-30