室内高密度培养中国对虾仔虾技术的研究

本文通过多因子正交试验、单因子补充试验和生产性试验,观察了盐度、饵料等因子对中国对虾(Penaeus oricntalis)仔虾的生长及其成活率的影响,对室内高密度培养仔虾的几项关键性技术作了探讨。试验结果表明:(1)仔虾的适宜盐度下限为16‰左右,最适盐度下限为22‰左右,25‰培养效果最佳。(2)第 1至第4天仔虾可投喂卤虫(Artemia salina)幼体。第 1天仔虾投饵量为 125只/尾,此后日增90只/尾。第5至第20天仔虾可改投颤蚓(Tubifex sp.)、磨碎的蛤仔(Venerupis philippinarum)肉或成体卤虫。投饵量可按W(克/百尾)=0.2482e^(?2?84t)式计算。式中t为仔虾日龄。(3)培养水中保持 0.5-1.0万细胞/毫升密度的扁藻(Platymonasspp.)有明显降低水中氨氮含量的作用。(4)培养水中保持0.5-1.0ppm 土霉素,不仅可预防疾病,且有促进仔虾生长的作用。(5)13口池共23立方米水体,共育成平均体长为0.95厘米的仔虾141万尾,每立方米水体出苗量达6.1万尾,总成活率达83.3％。

褶皱臂尾轮虫室内高密度培养及在远海梭子蟹育苗中的运用

The experiment of the cultivation of Brachionus plicatilis on high density was conducted, and artificial breeding of Portunus pelagicas with Brachionus plicatilis as food is tested . The results showed that it takes 8 days to increase from 200 Brachionus plicatilis/mL to 3 075 Brachionus plicatilis/mL. Using Brachionus plicatilis, Platymonas subcordiformis, Pavlova viridis Tseng and Artemia salina as food, it takes 14～16days to culture zoea of Portunus pelagicus from the first stage of zoeal to the first stage of crab with the survival rate 17%