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Conservation and Efficient Use of the Marine Biodiversity in the Ambient Sea of Kasiwajima Island : For the Promotion of community development -Approach form Biology and Social Sciences-

鹿岛近海海洋生物多样性的保护和有效利用：促进社区发展 -生物学和社会科学的方法-

基本信息

批准号：
12480164
负责人：
SHINBO Teruyuki
金额：
$ 7.94万
依托单位：
Kochi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

Biological Approach : In Kasiwajima Island, we conducted the research on fish faunae-using scuba from 2001 to 02 off Usironohama Beach. The substrates of study area were classified into three sub-areas ; live coral, dead coral and boulder. Two-hundred and six species belonging to 42 families were observed. Comparing the results among the three sub-areas, clear difference could be found, and many fish inhabited the live coral area. Seasonal and temporal changes in some environmental parameters and water quality were investigated in the ambient seawater. Judging from the data of seawater, environment ambient of the island was under strong influences bf oligotrophic Kuroshio current. In summer, however, concentrations of dissolved organic nitrogen (DON) increased in the bottom water, probably due to the production and excretion by corals. Some observation suggested that influences of relatively eutrophic coastal water were more significant in ebb tide period in the neap tide. Results obtained in the present study suggest that environments around the Kasiwajima Island changes, to some extent, depending on the season and the age of the moon.Approach from Social Sciences : In Kasiwajima region people have been engaged in fishery for generations. But recently there was born a quite new type of sea business. It is so-called diving shop. Their work is to guide and instruct diveres who came all the way Takamatsu, and Okayama city. I estimated acceptance probability curve and computed some statistic of Willingness to Pay (WTP). As a result, the value of aggregated WTP is 2.62 -9.91 billion yen. To verify the data reliability, we estimated bid function. We found the 1st presentation from respondents had reliability, but the 2nd one had less reliability. After that, we applied ZTCM (Zonal Travel Cost Method) to evaluate recreation benefit of Kashiwajima Island. We computed 3 estimates under 3 different assumptions.

生物学方法：在鹿儿岛，我们于2001年至2002年在Usironohama海滩附近使用水肺对鱼类动物群进行了研究。将研究区的底质分为三个亚区：活珊瑚、死珊瑚和巨石。共观察到206种，隶属于42科。比较三个分区的结果，可以发现有明显的差异，活体珊瑚区生活着许多鱼类。研究了环境海水中某些环境参数和水质的季节和时间变化。从海水资料来看，该岛的环境环境受到少营养黑潮的强烈影响。然而，在夏季，底层水中溶解有机氮(DON)的浓度增加，这可能是由于珊瑚的产生和排泄。一些观测结果表明，相对富营养化的近岸水体对小潮落潮期的影响更为显著。目前的研究结果表明，鹿儿岛周围的环境在某种程度上会随着季节和月亮的年龄而变化。社会科学的观点：鹿儿岛地区的人们世代从事渔业。但最近，一种全新的海上业务诞生了。这就是所谓的潜水店。他们的工作是引导和指导远道而来的高松和冈山市的人。我估计了接受概率曲线，并计算了一些支付意愿(WTP)的统计量。因此，WTP的合计价值为26.2亿-99.1亿日元。为了验证数据的可靠性，我们对投标函数进行了估计。我们发现，受访者的第一个陈述具有可靠性，但第二个陈述的可靠性较差。在此基础上，应用区域旅行成本法对鹿儿岛的游憩效益进行了评价。我们在3个不同的假设下计算了3个估计值。