中文摘要：

基于2005年夏、秋两季对枸杞岛海藻场渔业资源的调查数据，对海藻场内外渔业资源的组成、优势种变化、主要资源种类生物学特征以及多样性和相似性进行了研究。结果表明，枸杞岛海藻场内的渔业生物组成的季节变化比藻场外明显，但岩礁性鱼类除外；藻场内优势种夏季多于秋季，而藻场外两季相同，褐菖鱼由在夏、秋季的藻场内皆为优势种；各种类生物学特征也存在着明显的季节差异，夏季的性比差别大，秋季接近平衡，平均年龄秋季大于夏季，平均摄食强度夏季高于秋季；多样性值在夏、秋两季海藻场外皆大于海藻场内。藻场内外，夏季的多样性指数都大于秋季；同一季节藻场内外的相似性很低，不同季节，藻场内的相似性同样很低。通过现场调查及生物学实验，夏季海藻场作为幼小鱼类的索饵场所的生态功能得到了确认。

英文摘要：

On the basis of the data from two fishery resources surveys in Gouqi Island in the summer and autumn of 2005, studies were conducted on the species composition of fisheries resources, the variation of dominant species, the biological characteristics of main fishery species, and species diversity and similarity in and out of seaweed bed. The results indicated that except reef fish, the seasonal changes of fishery species composition in seaweed bed （SB） were much more obvious than those out of the seaweed bed （OSB）. Dominant species in SB were much more in summer than those in autumn, whereas the dominant species in summer and autumn remained unchanged in OSB. Japanese stingfish （Sebastiscus marmoratus） acted the dominant species in SB either in summer or in autumn. As for the biological characteristics of various species, there also existed distinct seasonal differences. Sexual distinction in summer was great, but approached the balance in autumn. The average age in autumn was bigger than that in summer, while the average feeding intensity in summer was higher than that in autumn. The values of diversity indexes in SB were bigger than those in OSB either in summer or in autumn, and the values of diversity indexes in summer were bigger than those in autumn either in SB or in OSB. The similarity values were very low between SB and OSB in same season, and between summer and autumn in SB. Through the survey on the spot and biological experiments, the ecological function of seaweed beds in summer as the feeding ground for young fish was further confirmed.