| 摘要: |
| 为了合理开发利用丹江口水库的渔业资源,1992年12月至1993年9月对丹江口水库的浮游甲壳动物进行了四次调查。结果显示丹江口水库浮游甲壳动物有26属36种,其中枝角类11属17种,桡足类15属19种。浮游甲壳动物年平均数量为31.0个/L,年平均生物量为0.6311mg/L,水库每年可提供浮游动物食性鱼类的年生产潜力为5.87×105kg。 |
| 关键词: 浮游甲壳动物 鱼产力 丹江口水库 |
| DOI：10.18307/1995.0306 |
| 分类号: |
| 基金项目: |
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| The crustacean zooplankton in the danjiangkou reservoir |
|
Peng Jianhua
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Institute of Reservoir Fisheries, Ministry of Water Conseroancy and Chinese, Academy of Sciences, Wuhan 430073
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| Abstract: |
| The Dsmjiangkou Reservoir, consisting of Hanjiang reservoir area and Danjiang reservoir area, was built in 1968 with a volume of 1.7×1010 m3. It is a top-grade, multipurpose reservoir with functions of flood-control, electrcity-generation, navigation and agriculture. From Dec. 1992 to Sep. 1993, the floating crustaceans in the reservoir were surveyed for 4 times In order to rationally develop and make use of its fishery resources. The floating crustaceans in the reservoir are simple in species composition, including 36 species in 26 generas, among which 1 7 species in 11 genera are cladecera and 19 species in 15 generas copepoda. The standing crop is also low, 31.0 ind./L (or 0.6311 mg/L). The standing crop of cladecera is 6.6 ind./L(or 0.4504 mg/L), and that of copepoda 24.4 ind./L (or 0.1807 mg/L). Bosmina coregoni and Mescyclops leuckarii are the year-round dominant species. The species number of the floating crustacean reaches minimum in Dec., including 19 species and maximum in March, including 29 species. Individuals reach minimum (12.9 ind./L) in March and maximum (49.6 ind./L) in Sept.; biomass reaches minimum (0.3404 mg/L) in Dec. and maximum (1.2452 mg/L) in June. The mean individuals of the floating crustaceans at the sampling stations are 20.0 in Hanjiang reservoir area eind 14.8 in Danjiang reservoir area. The floating crustacean in the reservoir can support 5.87×106 kg fish fed on floating crustacean every year. |
| Key words: Crustacean zooplankton potential productivity the Danjiangkou Reservoir |
