The effects of cells and cells different fractions of Heterosigma akashiwo on the early development of Engraulis japonicus were studied.The sensitive to algle toxin in the early development of Engraulis japonicus was ...The effects of cells and cells different fractions of Heterosigma akashiwo on the early development of Engraulis japonicus were studied.The sensitive to algle toxin in the early development of Engraulis japonicus was discussed too.The results indicated that the fertilized eggs before blastula and yolk-sac larva of Engraulis japonicus were more sensitive to algle toxin than other development stage.In the same conditions the toxic effect of cell contents on the early development of Engraulis japonicus was highest, cell-free medium was lowest ,algal culture and cell fragments were in the middle.The survival rate was 4% when Engraulis japonicus in the pre-larval-stage was exposed for 96 hours to cell contents at a high concentration of 90 000 cells/ml but the survival rate was 75% when exposed to cell-free medium.LC 50 values at 96 hours exposed to cell contents and cell fragments were 2 818 and 6 760cells/ml.展开更多
文摘The effects of cells and cells different fractions of Heterosigma akashiwo on the early development of Engraulis japonicus were studied.The sensitive to algle toxin in the early development of Engraulis japonicus was discussed too.The results indicated that the fertilized eggs before blastula and yolk-sac larva of Engraulis japonicus were more sensitive to algle toxin than other development stage.In the same conditions the toxic effect of cell contents on the early development of Engraulis japonicus was highest, cell-free medium was lowest ,algal culture and cell fragments were in the middle.The survival rate was 4% when Engraulis japonicus in the pre-larval-stage was exposed for 96 hours to cell contents at a high concentration of 90 000 cells/ml but the survival rate was 75% when exposed to cell-free medium.LC 50 values at 96 hours exposed to cell contents and cell fragments were 2 818 and 6 760cells/ml.
