| 摘要: |
本文根据1983月4月至1985年1月,在广西近海区(东经108°12'30″~109°41'、北纬20°53'45″~21°46')进行底栖生物调查所获得的资料,主要阐述棘皮动物在广西近海区的组成、分布及季节变化:
1.本次调查共获棘皮动物标本10734个,共67种,分隶于5纲,11目,25科、44属。海参纲出现的种数最多。
2.棘皮动物的种数在平面分布上比较有规律,出现深水区高于浅水区的趋势。但其数量、生物量及栖息密度的分布很不规则,这主要与个别种出现量巨大有关。3
.棘皮动物在各季度总生物量平均值波动于2.83~6.35克/米2之间,总平均为4.38克/米2。总栖息密度平均值波动于26~145个/米2之间,总平均为98个/米2。
4.洼颚倍棘蛇尾(depressus)出现量最大,共获5976个,占棘皮动物总采获量的55.7%。 |
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| COMPOSITION AND DISTRIBUTION OF ECHINODERMATA ALONG GUANGXI OFFSHORE AREA |
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Wang Zhicheng, Chen Qingfang
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| (Guangxi Institute of Oceanology) |
| Abstract: |
This paper is worked out according to the samples of Enchinodermata and related materials collected by Guangxi Institute of Oceanology by means of coast water investigation along Guacgxi offshore area(108°12'30″N-109° 4l'N,20°53'45″E-21°46'E).This paper introduces the composition and types of Enchinodermata along Guangxi offshore area, its distribution and season variety.
1.10734 samples were collected in this investigation, representing 5 classes, 11 orders, 25 families, 44 genera and 67 species. In 5 classes, the holothurians occupied a dominate position in number.
2.The distribution of echinoderms in horizontal level is relativelx regular,and take the trend that the unmber of species in deep water area is larger than that in shallow water area. However,the distribution of biomass and density are not regular, this has something to do with the tremedous number occupation of some species.
3. The average value of the total biomass of echinodefmata in each season changes from 2.83g/m2 to 6.35g/m2, totally averaging out to 4.38 g/m2; The average density in each season changes from 26/m2 to 145/m2(in nember), totally averaging out to 98/m2.
4. Amphioplus (Lymanella) depressus (Ijungman) is superior in number, taking 55.7% of the total number of echinodermata. |
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