黄河口及附近海域鱼卵和仔鱼种类组成及分布特征

摘要

根据2009年5月和8月2个航次对黄河口及附近海域18个站位的鱼卵和仔鱼调查资料,对该水域鱼卵仔鱼的种类组成和数量分布特征进行了分析和探讨.结果表明,鱼卵仔鱼的种类组成和数量分布呈现明显的季节变化特征；春季鱼卵仔鱼种类数高于夏季,平面分布范围大于夏季,主要优势种季节更替明显；与历史同期资料相比,鱼卵仔鱼种类和数量大幅下降,可能与渔业资源变动及环境变化等有关.%Based on two investigations in the Yellow River Estuary in May and August 2009, the seasonal variations of species composition and quantitative distribution of fish eggs and larvae were studied. The results showed that in the study area, the species composition and quantitative distribution of fish eggs and larvae varied remarkably in different seasons. The species composition varied greatly between May and August, and the species number was greater in May than that in August. The fish eggs and larvae had a smaller distribution range in August than in May, and the dominant species varied in May and August. Comparing to history data, the number of species and quantitative declined greatly and it might be related to the variations in fishery resources and environmental conditions.