生物多样性 ›› 2002, Vol. 10 ›› Issue (4): 351-358.doi: 10.17520/biods.2002049

• 论文 •    下一篇

东海春秋季大型底栖动物分布现状

刘录三, 李新正   

  1. (中国科学院海洋研究所,  青岛 266071)
  • 收稿日期:2001-12-25 修回日期:2002-10-24 出版日期:2002-11-20
  • 通讯作者: 李新正

Distribution of macrobenthos in spring and autumn in the East China Sea

LIU LuSan, LI XinZheng*   

  1. Instit ute of Oceanology , Chinese Academy of Sciences , Qingdao 266071
  • Received:2001-12-25 Revised:2002-10-24 Online:2002-11-20
  • Contact: LI XinZheng

根据2000年11月和2001年4月在121°~127°E、26°~32°N之间的东海水域所设的30个取样站所采集的526号采泥和973号拖网样品,共计392种大型底栖动物,报道了东海大陆架底栖动物的种类组成和数量分布。392种底栖动物中,多毛类95种,软体动物131种,甲壳类118种,棘皮动物48种。从分析结果看,底栖动物的种数自北向南和由近岸(西部)向外海(东部)逐渐增多。调查海区春季底栖动物平均生物量为7.21 g/m2,平均栖息密度为132.95个/m2;秋季底栖动物的平均生物量为8.79 g/m2,平均栖息密度为101.45个/m2。春秋季生物量及栖息密度等值线分布趋势无明显变化。在春秋季底栖动物生物量及栖息密度组成中均以多毛类占主要地位,春季生物量以多毛类和棘皮动物占优势。与1959~1960年的全国海洋综合调查对东海底栖生物的调查结果比较,当前东海海域大型底栖生物的分布格局和生态学特点无明显变化,但春季的生物量较1959年低。

关键词: 地方黄牛品种, 微卫星, 遗传变异, 遗传关系

This paper presents the results of ecological study of the macrobenthic fauna in the East China Sea in autumn and spring. The materials were collected from 30 stations located between 121°~127°E and 26°~32°N in November 2000 and April 2001. For quantitative analysis, samples were collected by 0.1 m2 box corer. Two successful grabs were regarded as one sample at a station. Samples were prepared by removing the mud and sand by whirlpool mud remover, filtering the specimens through a 0.1 mm sieve, and fixing them in 75% alcohol for small samples or 10% formalin for large. For   
qualitative analysis, samples were collected with a 1.5 m width×0.5m height Agassiz trawl, effectively trawling for 15 minute at   
2 knots speed, fixing the specimens as per the quantitative analysis. Biomass was measured by weighing the wet specimens with a 1/1000 gram precision electric balance. Altogether in the samples, 392 species of macrobenthos were identified, which belong respectively to Polychaeta, 95 species, Mollusca, 131 species, Crustacea, 118 species and Echinodermata, 48 species. Based upon the analysis of the data obtained during the survey, biomass of the macrobenthos averaged 7.21 g/m2 in spring and 8.79 in fall, and density averaged 132.95 individuals/m2 in spring and 101.45 in fall. There were no clear differences in density or distribution   
of the macrobenthos between spring and fall. In autumn, some species migrate from shore and Changjiang Estuary to the Kuroshio Current. Compared with the benthos research results of “The comprehensive resource investigation of Chinese coast and shallow waters” (1958~1960) and the Survey of “Jinxing” Vessel (1975~1976) in the same region, the distribution pattern and the ecological characteris   
tics of the macrobenthos have not changed dramatically, although the biomass in spring of 2001 was lower than that of 1959.

Key words: native cattle breeds, microsatellite, genetic variation, genetic relationship

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