Present condition and conservation of snails and their parasitic cercariae on tidal flats in west Pacific region

西太平洋地区滩涂钉螺及其寄生尾蚴现状及保护

基本信息

批准号：
15510192
负责人：
HARADA Masakazu
金额：
$ 2.24万
依托单位：
Kagawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510192/
关键词：
conservation evaluation of environment tidal flat cercaria snail trematode 保全西太平洋タイ韓国

项目摘要

Snails living on tidal flats and their parasitic larval trematodes were examined at about 60 sites in Japan. Snail diversities varied from tidal flats, but very high at Gabei tidal flat and estuary of Oura River in Nago city (Amami-Oshima Island), Sone tidal flat in Kitakyushu city and estuary of Takori River in Saga Pref. Seventeen kinds of cercariae were found from all snails examined. Infection rates of cercariae were very high in Batillaria cumingii at Yuuto-cho in Hamamatsu city, in B.multiformis at Jougasawa in Mutsu city, in Cerithidea cingulata at Urauchi River of Iriomote Island and C.rizophorarum at Doki River in Kagawa Pref. Highest diversity (5 species) of cercariae were recorded in Yuuto-cho, Waka River in Wakayama city and Urauchi River. Indices representing diversity and rarity of snails and cercariae were calculated and especially high values were obtained at Gabei tidal flat, Urauchi River and Oura River. Consequently it is thought that those places are most valuable h … More abitats for brackish water trematodes and that they are the most important candidates for conservation. In Thailand, snails and cercariae were examined at about 100 sites and the highest infection rate 100% was recorded in C.cingulata at Ban Klong Klaeng in eastern coast. Total infection rates of C.cingulata were almost the same as those of C.djadjariensis, but in coexisting sites infection rate of one species was often higher than the other. Cercaria diversity was highest at Mangrove Research and Development Station in Phuket town. Moreover we conducted the survey at three sites before and after the Indian Ocean tsunami, but the significant changes in infection rates and cercarial fauna were not detected. In Korea snails and cercariae were examined at seven sites. Infection rates in B.cumingii in Saemangeum tidal flat was very high and thought to be a valuable place for brackish trematodes. However, the tidal flat was closed by banks and snails and their parasites died out. In Myodo Is., Yeosu-shi, diversity of snails was high, but their infection rate to trematodes was very low. Less

在日本大约60个地点检查了生活在潮汐公寓及其寄生幼虫的tremat虫的蜗牛。蜗牛的多样性因潮汐公寓而异，但在Nago City的Gabei Tidal Flat和Oura River的河口（Amami-Ishima岛），Kitakyushu City的Sone Tidal Flat和Saga Pref的Takori River的河口。从检查的所有蜗牛中发现了17种cercariae。在马马马丘斯市的Yuuto-Cho，在Mutsu City的Jougasawa的B.Multiformis的Batillaria cumingii的cercariae感染率很高，位于Mutsu City的Jougasawa，位于Iriomote Island的Urauchi River的Cerithidea Cingulata的Cerithidea cingulata，在Kagawa Pref的Doki Riverrum。在Yuuto-Cho，Wakayama City的Waka River和Urauchi河中记录了最高多样性（5种）。计算了代表蜗牛和cercariae多样性和稀有性的指数，在Gabei Tidal Flat，Urauchi River和Oura River获得了尤其是高价值的指数。因此，人们认为这些地方是最有价值的h…更多的咸水怪异水平，它们是保护的最重要的候选人。在泰国，在约100个地点检查了蜗牛和尾car虫，并且在东海岸的Ban Klong Klaeng的C. ullata中记录了最高的感染率。 C. ulata的总感染率几乎与C.djadjariensis的感染率几乎相同，但是在共存的部位感染率通常高于另一物种。 Cercaria多样性在普吉镇的红树林研发局中最高。此外，我们在印度洋海啸之前和之后在三个地点进行了调查，但是未检测到感染率和尾动物区系的显着变化。在韩国，蜗牛和cercariae在七个地点进行了检查。 saemangeum tidal平坦的B. cumingii的感染率很高，被认为是微咸杂种的宝贵场所。但是，潮汐公寓被银行和蜗牛关闭，其寄生虫消失了。在Myodo是。较少的