Analysis on the annual water temperature change of sea cucumber ponds in Lushun
In order to find out the annual water temperature change of sea cucumber breeding ponds in Lushun,three adjacent sea cucumber breeding ponds with the same management method were observed for one year.The results showed that the surface and bottom water temperatures of sea cucumber ponds changed with air temperature during the year.In vertical distribution,the bottom water temper-ature in March was significantly higher than the surface water temperature,and the surface water tem-perature during the day in spring was significantly higher than that of the bottom water.The water temperature at 80-120 cm depth was significantly lower than that of other water layers in summer,and there was no significant difference in the water temperature each water layer in autumn and winter.At the same time,the observation of the vertical distribution of dissolved oxygen and salinity each season showed that the surface dissolved oxygen in spring and summer is significantly higher than that of the bottom layer,and the surface salinity in summer is significantly lower than that of the bottom layer.The survey results preliminarily showed that sea cucumber breeding ponds in Lushun are prone to strat-ify from the spring ice period to the summer high temperature period,which is unfavorable for sea cu-cumber aquaculture production.Farmers should extend the working hours of aerators to promote water exchange on the basis of natural water exchange.Farmers can also install on-line monitoring equipment for surface and bottom water quality,and start aerators in time when the water has a layered develop-ment trend.
NETL
NSTL
万方数据
