REPORTS OF FISH CULTURE RESEARCH SUPPORTED BY ROCKEFELLER FOUNDATION - 農業知識入口網

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出版機關	農復會

The Chironomid larvae in the Tainan milkfish ponds begin their diapause in mid-November when the temperature drops below 20°C and resume their development and reproductive activity in late February when the temperature rises above 20\'C again. In April, the midge population grows to a density destructive to the benthic algae in the nursery ponds in the western part of the Tainan milkfish ponds and begins to disperse eastward. The population grows during this eastward dispersion. The salinity of pond water exerts some effect on the growth of the larvae and the dispersion speed of the midge popUlation. The infested area of midge expands 3.0 km eastward from the Old Fort to the west boundary of downtown Tainan in two months.