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| Ecological Characteristics of Phytoplankton in Higher-place Shrimp Ponds with Circulation |
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| KeyWord:higher place pond; rates of recycling; phytoplankton; ecological characteristics |
| Author Name | Affiliation | | WEI Xiao-lan | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China
Life science and Technology College of Jinan University, Guangzhou 510632, China | | LI Chun-hou | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China | | XIE Xiao-yong | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China | | LU Qin-yan | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China
College of Fisheries and Life Science Shanghai Ocean University, Shanghai 201306, China | | DAI Ming | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China | | LIAO Xiu-li | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China | | HU Wei-an | South China Sea Fisheries Research Institute, CAFS, Guangzhou, 510300, China
College of Fisheries and Life Science Shanghai Ocean University, Shanghai 201306, China |
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| Abstract: |
| Phytoplankton dynamics is critical to water quality and shrimp yield in higher-place shrimp ponds. A study was carried out to examine the community structure and dynamics of phytoplankton in higher-place ponds of Litopenaeus vannarnei with water circulation system from August to November in 2010. The experiment included three different circulation treatments-20 m3·h-1（Pond one），40 m3·h-1（Pond two） and 60 m3·h-1（Pond three）. Phytoplankton was found to mainly belong to 99 species, 49 gena, 5 phyla in the circulating ponds，and 108 species, 54 gena, 8 phyla in the contral pond. Most of the species were the Chlorophyta, followed by Bacillariophyta and Euglenophyta, and last Cyanophyta, accounting for 39.8%, 21.1%, 16.3%, 15.4% of the total, respectively. The dominant species were Chlorophyt and Bacillariophyta in recirculation ponds, but Cyanobacterial in the control pond. Density and biomass of phytoplankton were very significantly lower in the recirculation system（208.34～998.8 ×104 ind·L-1 and 2.96～10.19 mg·L-1） than in the control pond（324.58～1 343.26 ×104 ind·L-1 and 3.59～18.86 mg·L-1）（P＜0.01）. The Shannon-Wiener diversity indexes of phytoplankton were 1.03～2.18 and 1.01～1.56 for recirculating and control aquaculture pond, respectively. |
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