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Studay on the Planning of Water Reservior and Canal System to Furnish the Condition of Habitat for the Fish in Cyprinidae

为鲤科鱼类提供栖息环境的水库和渠系规划研究

基本信息

批准号：
05660264
负责人：
OKUBO Hiroshi
金额：
$ 1.41万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

This study covered a 3-yr period between 1993 and 1996. In recent years, the purpose of public construction has been developing from the social capital inbestment for prduction activities to one for human life environment creation and improbement. That works may be located in buffer area between nature conservation area and human activities area in, so to say, the Ecological Network. Therefore it becomes important for the sufficient planning to collect the data of actual condition of relation between nature and human activities in the water reservior and cannal system.Well, Cyprinus carpit (carp), Carassius carassius (crucian carp), the typical larget fish for fishing at the lower river area and water reservior. Specialy, among the people fishing Hera-buna (Carassius auratus cuvieri), a club and a party used to be established. And social action, for examlpe, cleanning the fishing area and release of fishes and so on, is taking place by those clubs. In the first part of this study, the actual convition of above Hera-buna fishing was investgated through the questionaire distributed to the member of partys in Yamagata prefecture and through field investgation on fishing activity. Using the results, 5 factors of angler's estimation for the reservior were analized. And the water reserviors were classified to 3 types as fishing place. After the construction or improvement of water reservior to furnish the condition of habitat, it becomes the next issue to release fishes into the new facilities. So, in the second part of this study, the vertical profile of desolved oxygen (Do) wes observed by setting a buoy with 4-pipes (length 4m) in the Tamagawa Pond. Then influence of phytoplankton to the Do profile was estimated. However it was considered that the influence was insignificant in Tamagawa Pond. And it was concluded from the changing of total desolved oxygen that the period needed to return to natural condition was about 2-months.

这项研究涵盖了1993年至1996年的三年期。近年来，公共建设的目的已经从投入社会资本进行生产活动，发展到创造和改善人类生活环境。该工程可能位于生态网络中自然保护区和人类活动区之间的缓冲区。因此，充分收集水库和渠系中自然与人类活动关系的实际情况的资料，对于充分规划是非常重要的。鲤鱼（Cyprinus carpit）、鲫鱼（Carassius carassius）是下游地区和水库中典型的大型鱼类。特别是，在捕捞Hera-buna（Carassius auratus cuvieri）的人中，曾经建立了一个俱乐部和一个聚会。社会行动，例如，清理捕鱼区和释放鱼类等，是由这些俱乐部进行的。本研究的第一部分，通过对山形县党员发放的问卷调查和对渔业活动的实地调查，调查了上述Hera-buna渔业的实际情况。利用该结果，分析了钓鱼者对水库评价的5个因素。将水库划分为3种类型，作为渔业捕捞场所。在兴建或改善水库以提供栖境条件后，将鱼类放流至新设施成为下一个议题。因此，在本研究的第二部分中，我们在多摩川池塘中设置了一个长4 m的四管浮标，观测了溶解氧（DO）的垂直分布。然后估算了浮游植物对DO剖面的影响。但在多摩川池，认为影响不大。根据总溶解氧的变化，推测恢复到自然状态需要2个月左右的时间。