EFFECTS OF Ca~(2+), Mg~(2+) CONCENTRATI AND Ca~(2+)/Mg~(2+) ON HATCHING RATES FOR THE EGGS OF Anguilla japonica REARED IN ARTIFICIAL SEA WATER

• 海水中Ca~(2+),Mg~(2+)的含量及Mg~(2+)/Ca~(2+)对日本鳗鲡受精卵孵化率的影响