. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 30 Jul. 1 17 18 24 5 dehaani • - -. vf hr vf '() c •>(hr, c) ?(c,hr) ?(l,r) hr 19 20 21 22 23 FIGURE 3C. Time of day of larval release in Sesarma dehaani, 21 June 9 July 1975. Two days when phase of larval release rhythm are regarded as identical were substituted for a day of no observations. Sunset times also substituted. release. Ovigerous females move to the shore during the daytime. Around both the full and new moons they release larvae with the onset of night. On the following days, some wait until high water bef
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 30 Jul. 1 17 18 24 5 dehaani • - -. vf hr vf '() c •>(hr, c) ?(c,hr) ?(l,r) hr 19 20 21 22 23 FIGURE 3C. Time of day of larval release in Sesarma dehaani, 21 June 9 July 1975. Two days when phase of larval release rhythm are regarded as identical were substituted for a day of no observations. Sunset times also substituted. release. Ovigerous females move to the shore during the daytime. Around both the full and new moons they release larvae with the onset of night. On the following days, some wait until high water before releasing larvae. On coasts with semidiurnal tides, though the times of high and low waters on days of full and new moons always occur at nearly the same time of day for years, they differ at various locations on the seashore. According to Neumann (1975, 1976, 1978), the time of emergence and subsequent reproduction was correlated with local low waters. The semidiurnal cycle of tides shows time displacements of a few hours along the coasts of Japan, especially in the Inland Sea. It is not known whether larval release activities in S. haematocheir and S. intermedium are syn- chronized with such local tidal conditions. Further insight into adaptive benefits of a semilunar rhythm of larval release may be expected. Christy (1978) recently proposed a hypothesis to explain the semi-monthly release of Uca pugilator larvae. He estimated that juvenile crabs would be ready to settle on an intertidal flat about 3 weeks later, , during spring. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 18
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
