摘要
依据1999年6～8月在东海（26°30’～32°30’N、121°00’～128°00’E）海域的鱼卵仔鱼资源调查资料，对东海鱼卵仔鱼种类组成结构的特征进行了分析，并就其与水温、盐度的关系进行了探讨。结果表明：鱼卵仔鱼种类组成丰富，整个调查海域，种类数平面分布呈南部高，北部低的分布特征。仔鱼的种类结构相对鱼卵要稳定，多样性指数较高，其种类组成复杂，种间分布不如鱼卵均匀，优势种明显，优势度较大。温度和盐度是影响鱼卵仔鱼种类分布的重要环境因子。多样性指数与种类数分布的空间差异，与台湾暖流、黑潮水以及江浙沿岸流的消长有关。
Based on the measured results from oceanographic survey carried out, in the East China Sea（26°30＇--32°30＇N. 121°00＇- 128°00＇E） in 1999 from june to October, this paper analyzed species composition and distribution of fish eggs and larvae and studied on the relationship with species composition and hydrologic environmental factors. According to the results,80 species were identified in the surveying waters, which be longed to 1 l genus, 52 families and 40 orders. Perciformes was the main predominant group of all genera, which was 48.75 percent of total numbers of species. All species were categorized into four ecological forms, such as brackish forms, eurythermic euryhaline forms, temperate euryhaline forms, and tropical halophile forms. Scomber japonicus and Engraulis japonicus were respectively dominant species of fish eggs and larvae. The numeral distribution of species was different on account of the different waters environmental conditions. The distribution was marked the boundary by 30 N. Its distributional characteristics showed that the value in northern was less than that in southern waters. As a result of water temperature in the majority of north waters was a bit lower; amount of some species that adapting well to lower temperature were reduced, Taiwan warm current and the kuroshio brought many tropical species with both high temperature and salinity into the south-east waters. It was the reason that the numbers in the northern was much less than that in the southern. The stability of species composition of larvae was inferior to fish eggs. The diversity index of larvae was higher than that of fish eggs ; also the composition was more complicated than fish eggs. The interspecific uniformity was no symmetrical than fish eggs. The dominant species was obviously of larvae, the dominance value higher than that of fish eggs. The biodiversity index of fish eggs and larvae was affected by water temperature and salinity. The regression analysis of the relativity between H＇ and water temperature, salinity showed that, the correlation coefficients between H＇ of fish eggs and water temperature, H＇ of larvae and water temperature and salinity were significant at 0.05 and 0.01 level respectively. H＇ value was lower basically intensification of the Jiangzhe coastwise current, water commuted notability which resulted in species subrogation distinctly and community instability, in the southern offsea. As far as H＇ value of the southern outsea was concerned, the kuroshio waters controlled perennially, waters condition diversification was less, the ecological system was steady, the same as the ecological groups construction, abovementioned condition led to the value was higher.
出处
《生态学报》
CAS
CSCD
北大核心
2007年第1期152-158,共7页
Acta Ecologica Sinica
基金
国家海洋勘探专项资助项目(HY126-02-03-06)~~
关键词
鱼卵仔鱼
种类组成
多样度
平面分布
水文环境
fish eggs and larvae
species composition
diversity index
distribution
hydrologic environment
