Geographical variation in reproductive traits of coral reef invertebrates.

对冲绳珊瑚Stylophora pistillata的有性繁殖进行了研究。珊瑚在4月、5月和6月满月后的一周内同步释放浮游生物。精巢和卵巢分别于1月和10月开始发育。在释放前一个月，息肉的腔肠内出现了扁平线虫。扁平线虫在息肉的腔肠中持续生长了一个月。冲绳沙门氏菌馏分种群的繁殖模式将与关岛种群的繁殖模式进行比较。(Yamazaio)将印度-太平洋棘盘吸虫的4个种初步分类为A、B、C和D(Uehara，1991)。异花受精的失败和配子形态的差异表明，冲绳种D和夏威夷种D是不同的种。冲绳岛D和冲绳岛B的配子不亲和程度不同于冲绳岛D和关岛B。这表明冲绳岛B和关岛B在受精…处处于物种形成过程中更高的水平。关岛种群和冲绳种群在形态上存在显著差异。在关岛发现一新种，属于棘皮藻属。(Uehara)比较了束状银杉的两个变种以及柱头海鞘和丝状海鞘触角中一种主要线囊的大小和形状。结果表明，线囊形态与骨骼特征密切相关，束状鞭毛虫和柱状丝状丝虫和丝状丝状丝虫两个变种是不同的种。当出现陆源径流时，观察到珊瑚卵的受精率显著下降。在Sesoko岛大桥附近的珊瑚礁收集的水域中，Acropora卵的浮游生物形成减少了95%。水的含盐量为28.5%，赤红壤含量为1.28克/升。需要检查影响受精的因素，以确定是什么导致了受精减少。(里士满)对珊瑚群落/种群结构进行了实地调查，并使用关岛和冲绳三个站两个深度(3米和5米深)的网箱进行了实地实验，以评估消费者对生物量积累的影响。各站间珊瑚群落/种群结构和生物量积累均存在显著差异。目前正在分析记录的参数之间的相互关系。(酒井和伯克兰)更少

The sexual reproduction of the coral Stylophora pistillata was studied in Okinawa. The coral released planulae synchronously one week after the full moon in April, May and June. The development of testes and ovaries began in January and in October, respectively. Planulae appeared in the coelenteron of polyps one month before being released. The planulae kept growing for one month in the coelenteron of the polyps. The reproductive pattern of Okinawan S. Distillate populations will be compared with that of Guam populations. (Yamazaio)The four species of Indo-Pacific Echinometra were classified tentatively as A, B, C and D (Uehara, 1991). The failure of cross-fertilization and the differences in the gamete morphology show that Okinawan and Hawaiian species D are distinct species. Degree of gamete incompatibility between Okinawan D and Okinawan B was different from that between Okinawan D and Guam B. This suggests that Okinawan B and Guam B are in the process of speciation at fertilization … More level. Significant differences in the morphology of Echinothrix calamaris were found between Guam and Okinawan populations. A new species belonging to the genus Echinothrix was found in Guam. (Uehara)The size and shape of a major type of nematocysts in tentacles were compared between two morphs of Galaxea fascicularis and between Stylophora pistillata and S. mordax. The results show that nematocyst morphology correlates with skeletal characters and that the two morphs of G. fascicularis and S. pistillata and S. mordax are, respectively, distinct species. (Hidaka)A marked decrease in fertilization rate of coral eggs was observed when terrigenous run-off was present. There was a 95% reduction in planulae formation for Acropora eggs in waters collected from the reef near the Sesoko Island Bridge. The water was found to have 28.5 % salinity with a lateritic soil content of 1.28 grams/liter. The factors affecting fertilization need to be examined to determine what is causing the reduction. (Richmond)Field survey of coral community/population structure, and field experiment for assessing the effect of consumers on biomass accumulation were carried out using cages at two depths (3 and 5 m deep) of three stations each in Guam and Okinawa. Significant difference was found both in coral community/population structure and in biomass accumulation among the stations. Correlations among the recorded parameters are now being analyzed. (Sakai and Birkeland) Less