Primary production and physico-chemical parameters of a freshwater fish farm in the south east Nigeria
Comparative primary production in Little Stream Farms, near Uyo was investigated in relation to physico-chemical parameters of the adjacent perennial stream and the fish ponds. Except for temperature, which showed the same values for both stations, physico-chemical variables generally showed significant difference (P<O.05) between the pond water and the adjacent stream. Values of silicates, Turbidity (NTU), Secchi Disc Transparency and Total Suspended Solids (TSS) exhibited significantly variable trends (P<O.05), especially in the stream water, in response to the commercial sand dredging activities upstream from the fann location. Lowest value of stream transparency (O.1M) recorded was during the peak of the sand dredging, whereas the stream water showed absolute transparency in the absence of the dredging. The water quality parameters also exhibited a general trend of significant seasonal variation (P<O.05). Five phytoplankton families: Bacillariophyceae, Chlorophyceae, Cyanobacteria, Euglenophyceae and Dinophyceae occurred in the ponds, while three families, Bacillariophyceae, Chlorophyceae and Cyanobacteria occurred in the stream. Bacillariophyceae showed the highest relative abundance in both stations A and B.
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2009
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| Subjects: | Aquaculture, Chemistry, Ecology, Nigeria, Akwa Ibom State, freshwater environment, Physicochemical properties, Freshwater ecology, Water quality, Phytoplankton, Suspended particulate matter, |
| Online Access: | http://hdl.handle.net/1834/38134 |
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