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Methods to create aquatic environment with self sustenance on biotope functions under flooding

洪水下群落生境功能自给自足的水生环境营造方法

基本信息

批准号：
18360251
负责人：
KUSUDA Tetsuya
金额：
$ 10.69万
依托单位：
The University of Kitakyushu
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360251/
关键词：
The River Kita Dairatonotus japonicas estuary rare species salt wedge life cycle protection of organisms The River Gokase 五ヶ瀬川幼生遺伝子解析河口域プライマー生息調査

项目摘要

The purpose of this study is to establish conservation methods of endangered species of crustaceans, especially Dairatonotus japonicas in the River Kita, a part of the River Gokase, Miyazaki Prefecture, Japan.The results obtained consist of scientifically basic ones and methods to conserve it.Scientifically basic results are as follows :1) The life cycle of D. japonicas is investigated. In order to make identifying species of larvae possible, a gene technology was applied. The larvae were not transported to the ocean from the estuary ;2) Characteristics of D. japonicas on resistance and preference ware investigated and by using its results, the transport of the larvae was numerically simulated. As a result, larvae of D. japonicas are concentrated around the upstream end of the salt wedge ;3) The larvae of D. japonicas are sort of halophilic, but the adults are, however, not. This characteristics are utilized to reduce washout of the larvae to the ocean ; and4) D. japonicas shares space with other competitive species, such as Sesarmops intermedium. Overlap of the living space may happen, but severe competition was not found.Methods to conserve D. japonicas are as follows:5) Artificial pools are effective to protect adults of D. japonicas; under flooding. Sediment transport, especially sand takes place severe damage to D. japonicas.

本研究旨在建立日本宫崎县五濑川北江的濒危甲壳动物，特别是日本袋背甲（Dairatonotusjaponicas）的保护方法。研究结果包括科学基础和保护方法。japonicas进行了研究。为了使鉴定幼虫种类成为可能，应用了基因技术。2）在河口区的D.研究了棉铃虫幼虫的抗性和选择性，并利用其结果对棉铃虫幼虫的迁移进行了数值模拟。结果表明，D.盐楔的上游端是日本圆蚧的聚集区;日本海象有点嗜盐，但成年海象却不是。这一特性被用来减少幼虫向海洋的冲刷; japonicas与其他竞争物种共享空间，如Sesarmops intermedium。生活空间可能发生重叠，但没有发现严重的竞争。（5）人工池塘能有效地保护松褐天牛成虫。japonicas;在洪水下。泥沙输移，尤其是泥沙输移对D. japonicas.