Journal of The Japanese Coral Reef Society最新文献_第6页

Changes of cnida composition during planula development of a reef-building coral Acropora nasuta 造礁珊瑚在浮藻发育过程中胞丝组成的变化

Journal of The Japanese Coral Reef Society Pub Date : 2000-12-20 DOI: 10.3755/JCRS.2000.39

T. Hayashibara, T. Kimura, M. Hatta

引用次数: 7

Developmental changes in cnida composition of the coral Pocillopora damicornis 大角珊瑚虫胞丝组成的发育变化

Journal of The Japanese Coral Reef Society Pub Date : 2000-12-20 DOI: 10.3755/JCRS.2000.23

C. Paruntu, K. Hidaka, M. Hidaka

{"title":"Developmental changes in cnida composition of the coral Pocillopora damicornis","authors":"C. Paruntu, K. Hidaka, M. Hidaka","doi":"10.3755/JCRS.2000.23","DOIUrl":"https://doi.org/10.3755/JCRS.2000.23","url":null,"abstract":"The developmental changes in cnida composition of the coral Pocillopora damicornis was studied. At least two types of microbasic p-mastigophores (type I and type II MpM), large and small holotrichous isorhizas (HI), microbasic b-mastigophores (MbM) and spirocysts were observed in P. damicornis. The nematocyst composition of planulae was similar to that of one or two day old primary polyps, but markedly different from that of adult colonies. The large HI were observed only in planulae and primary polyps. MbM were most abundant in planulae and primary polyps while type I MpM were most abundant in adult colonies. The size of MbM and type II MpM was different between planulae or primary polyps and adult colonies. While large HI were retained at least for one week after settlement, spirocysts appeared to decrease temporarily after settlement. The present observations suggest that large HI are used for defense against predators at early stages of development and spirocysts are used for attachment to the substrate during settlement. The present study showed that the cnida composition and the dimensions of certain types of nematocysts change during the course of development of P. damicornis.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"12 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128864535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

The Future of Coral Reefs 珊瑚礁的未来

Journal of The Japanese Coral Reef Society Pub Date : 2000-12-20 DOI: 10.3755/JCRS.2000.13

Jc Rs, C. Birkeland

引用次数: 337

Reduced reproductive success in scleractinian corals that survived the 1998 bleaching in Okinawa 1998年冲绳白化事件中幸存下来的硬核珊瑚繁殖成功率降低

Journal of The Japanese Coral Reef Society Pub Date : 2000-12-20 DOI: 10.3755/JCRS.2000.17

M. Hirose, M. Hidaka

{"title":"Reduced reproductive success in scleractinian corals that survived the 1998 bleaching in Okinawa","authors":"M. Hirose, M. Hidaka","doi":"10.3755/JCRS.2000.17","DOIUrl":"https://doi.org/10.3755/JCRS.2000.17","url":null,"abstract":"Okinawan coral reefs experienced extensive coral reef bleaching in the summer of 1998 (Fujioka 1999, Taniguchi et al. 1999, Sugihara et al. 1999, Yamazato 1999). Around Sesoko Island (Okinawa, Japan), about 90% of hard corals and soft corals disappeared from the reef flat after the bleaching event (Yamazato 1999). We have been studying early development of zooxanthella-containing eggs of scleractinian corals belonging to the genus Pocillopora since 1997 (Hirose et al. 2000), and studying the incorporation of zooxanthellae into oocytes of Montipora species since 1995 (Hirose et al, in preparation). During the 1999 reproductive season, we tried to observe the early development of Pocillopora verrucosa and Montipora digitata. However, the number of colonies which spawned gametes was low in P. verrucosa, and even when we got a sufficient amount of gametes for fertilization experiments, fertilization rates were extremely low. Szmant and Gassman (1990) reported that corals that remained bleached over an extended period were not able to complete gametogenesis during the reproductive season following the bleaching, while those corals that recovered and regained their zooxanthellae by the next spring were able to follow a normal gametogenic cycle. However, the effects of thermal stress on the reproductive biology of corals are only partly understood (HoeghGuldberg 1999). Here we report preliminary observations on gamete production, the percentage of colonies which spawned gametes, and the fertilization rate of two scleractinian corals, Montipora digitata and Pocillopora verrucosa during the reproductive season following the 1998 bleaching. Both species are hermaphroditic spawners and release zooxanthella-containing eggs (Hirose et al. 2000). While most colonies of P, verrucosa at our collection site died after the 1998-bleaching event, colonies of M, digitata survived, even in shallow waters.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131669543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Changes in zooxanthellae characteristics in the coral Stylophora pistillata during the 1998 bleaching event 1998年白化事件期间雌蕊柱头珊瑚虫黄藻特征的变化

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.97

T. Kuroki, R. Woesik

引用次数: 18

Changes in living coral coverage before and after the 1998 bleaching event on coral reef flats of Ishigaki Island, Ryukyu Islands 琉球群岛石垣岛珊瑚礁滩1998年白化事件前后活珊瑚覆盖率的变化

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.73

H. Kayanne, S. Harii, H. Yamano, M. Tamura, Y. Ide, Fujio Akimoto

引用次数: 34

Coral bleaching in Okinawa, 1980 vs 1998 1980年与1998年冲绳珊瑚白化

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.83

K. Yamazato

{"title":"Coral bleaching in Okinawa, 1980 vs 1998","authors":"K. Yamazato","doi":"10.3755/JCRS.1999.83","DOIUrl":"https://doi.org/10.3755/JCRS.1999.83","url":null,"abstract":"The author has witnessed two coral bleaching events taken place at Sesoko and Okinawa islands in 1980 and 1998. Although the final reports of the 1998 event are not accessible, the author tries to make some comparisons among the events according to his own report on the 1980 event (Yamazato 1981) and his personal experiences of the 1998 event. Coral bleaching in 1980 around Sesoko Island, Okinawa, Japan appears to have been a local event, while that of 1998 was much more extensive affecting all islands of the Ryukyu Islands and Southern Kyushu. Abnormally high surface temperatures were observed on the reef flat during daytime low tide in the summer of 1980, while it was observed continuously throughout the summer of 1998, affecting not only coral reef waters but also coastal waters both day and night. In 1980, over 40% of coral colonies bleached once and about 10% died, the rest of the bleached corals recovered by the following January. In the 1998 event, according to visual observations of the author made on the same reef section, almost 90% of corals and soft corals bleached and died, with only a few colonies of a few species that recovered. In addition to these personal observations, some results of new surveys are presented and comparisons between the two events are made.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114267617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

A foreword by the President of the Japanese Coral Reef Society 日本珊瑚礁学会会长的前言

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.1

K. Yamazato

引用次数: 0

Does enrichment by inorganic nutrients prevent bleaching in the coral Galaxea fascicularis exposed to high temperature 无机营养物的富集是否能防止受高温影响的束状星系珊瑚的白化

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.3

M. Hidaka, A. Miyagi

引用次数: 1

Warning from the coral reefs 珊瑚礁发出警告

Journal of The Japanese Coral Reef Society Pub Date : 1999-10-20 DOI: 10.3755/JCRS.1999.27

M. Tsuchiya

引用次数: 8