日本海西南海域およびその周辺海域産ムシガレイEopsetta grigorjewi (HERZENSTEIN)の漁業生物学的研究-VI
発生初期と飼育による生長
1974 年 40 巻 11 号 p. 1107-1114
詳細
1974 年 40 巻 11 号 p. 1107-1114
Imaoka has reported on the results of long-term rearing of the roundnose flounder, Eopsetta grigorjewi HERZENSTEIN, in an aquarium. In this paper, the authors report on its spawning, hatching, and larval rearing in an aquarium.
The experiments were conducted from February to March of 1972 and 1973. The eggs obtained by natural spawning and artifical fertilization began to hatch out at about 102 hrs (when the water temperature was regulated between 12-13°C during daytime and 8-10°C in the night) and 75 hrs (when the room temperature was regulated at 14°C).
The rate of artificial fertilization was 85-93%. The rotifer as the first food was given after three days of hatch-out.
In those experiments, death of larvae decreased after the tenth day and the averaeg body length of larvae was 6.7-7.0mm by the twenty fifth day of rearing.
