Studies on the community structures of el Nino-influenced coastal ecosystems in tropical Pacific : consideration of fisheries potentials

1.研究了热带太平洋受厄尔尼诺影响的沿海生态系统的群落结构，特别是渔业潜力。在印度尼西亚东部的浅礁栖息地进行了鱼类区系的水下目视观察。已鉴定鱼类400余种，其中以鱼科和唇科种类最多。物种丰富度是生物多样性研究中衡量多样性的重要指标。提出并讨论了一种估算珊瑚礁鱼类等物种丰富度组合中物种丰富度的新方法。还利用来自北苏拉威西的数据分析了渔获量统计。通过实地调查和实验相结合的方式，对北苏拉威西一个珊瑚礁群的丰度和补充模式进行了调查。研究了秘鲁中部两种捕食性海星（Heliaster helianthus和Stichaster striatus）及其贻贝猎物（Semimytilus algosus和Perumytilus purpuratus）的种群波动。还收集了渔业统计数据，以分析与厄尔尼诺现象有关的情况。研究了亚热带西太平洋固着和移动的组合的种间关系，作为了解热带海岸生态系统群落结构变化的基础。

1. The community structures of el Nino-influenced coastal ecosystems in tropical Pacific were investigated, with particular reference to fisheries potentials.2. Underwater visual observation of fish fauna was conducted in the shallow reef habitats of eastern Indonesia. Over 400 species of fish have been identified, of which Pomacentridae and Labridae were dominant in terms of the number of species.3. Species richness is an important measure of diversity in biodiversity studies. A new procedure for estimating species richness in species-rich assemblages such as coral reef fishes was proposed and discussed. Fisheries catch statistics were also analysed with data derived from North Sulawesi.4. Patterns of abundance and recruitment in the coral assemblages of a reef in North Sulawesi were investigated through a combination of field surveys and experiments.5. Population fluctuations in two predatory starfish species (Heliaster helianthus and Stichaster striatus) and their mussel prey (Semimytilus algosus and Perumytilus purpuratus) were studied in central Peru. Fisheries statistics were also collected for analysis in relation to el Nino phenomena.6. Interspecific relationships were examined in sessile and mobile assemblages of subtropical western Pacific, as a basis for understanding variability in community structure of tropical coastal ecosystems.