Journal of Dalian Ocean University  2009, Vol. 24 Issue (4): 288-299 DOI: 10.3969/j.issn.1000-9957.2009.04.002 |
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| The planktonic community feature in a hatchery water system for short - necked clam, Ruditapes philippinarum |
| ZHAO Wen, ZHANG Guo-fan WANG Lei, ZHANG Dong-sheng,YAN Xi-wu, SHAO Ning-ning , YU Shi-chao
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| 1. Liaoning Provincial Key Laboratory of Hydrobiology, Dalian Fisheries Univ. , Dalian 116023, China; 2. Institute of Oceanology, the Academy of Sciences, Qingdao 266071, China |
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Abstract Planktonic community features in a hatchery water system for short - necked clam, Ruditapes philippina rum were investigated at Haiyang village of Zhuanghe, Dalian, Liaoning Province in China from May to November in 2005. Totally, sixty - two taxa （most diatom）of phytoplankton （the biomass of 2.90 -30. 91 mg/L） were found in the water, with the predominant species of Nitzschia closterium, Chaetoceros lorenzianas, Nitzschia sp. , Phaeodactylum tricornutum, Navicula sp. , Chroomonas acuta, Chlorella vulgaris, and Euglena viridis, and the maximum mean biomass （16.78 mg/L） at the exit of a deposit pond, followed by in the entrance station, and the minimum at the exit of the purifier pools. There were forty - five taxa of zooplankton comprised of eopepods and its nauplius or copepodite, Leprotinnus nordquisti, Chilodonella vorax, Strobilidium gyrans, Brachionus plicatilis, Epiphanes senta, Paracalanus parvus, Corycaeus affinis and Cypris subglobosa being the predominant species. The mean density of the zooplankton varied from 5.5 ind./L to 118 ind./L, with mean biomass of 0.01 mg/L to 5.97 mg/L, the maximum biomass （2.48 mg/L） in the shallow area, and the minimum in the purifier pool.
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Published: 30 December 2016
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