An evaluation of Secchi disk visibility for estimating plankton density in Fish ponds
暂无分享，去创建一个
Correlation coefficients between Secchi disk visibility (X) in fish ponds and concentrations of chlorophyll a and particulate organic matter were −0.79 (P< 0.01) and −0.83 (P< 0.01), respectively. Different observers may obtain different values for Secchi disk visibility and measurements by the same observer differ with the time of day. Nevertheless, Secchi disk visibility provides a suitable estimate of plankton density for management purposes in ponds were plankton is the primary source of turbidity
[1] E. V. Smith,et al. Management of farm fish ponds , 1942 .
[2] J. Barica. Summerkill Risk in Prairie Ponds and Possibilities of its Prediction , 1975 .
[3] C. Boyd. Water Chemistry and Plankton in Unfertilized Ponds in Pastures and in Woods , 1976 .
[4] C. Boyd. Summer algal communities and primary productivity in fish ponds , 1973, Hydrobiologia.
[5] J. W. G. Lund,et al. A Manual on Methods for Measuring Primary Production in Aquatic Environments. , 1970 .