不同食物组合与投喂方法对蒙古裸腹溞生长和生殖的影响

蒙古裸腹(Moina mongolica Daday)是旧大陆上分布的一种盐水裸腹溞1],1988年在我国被首次报道2].有关该溞的生物学和培养技术已被较为系统地研究3].20世纪90年代以来,该溞在我国沿海地区逐渐被用做海水和半咸水鱼、虾、蟹人工育苗生产中的活饵料.

Effects of different food composition and feeding regimes on growth and reproduction of Moina mongolica Daday

:A laboratory experiment was carried out to evaluate effects of different food composition and feeding regimes on growth and reproduction of Moina mongolica Daday .Three food composition (1 ?106cells ?mL -1 Chlorella sp . 2 ?10 -5g?mL -1 baker' s yeast , 1 .5 ?106 cells?mL -1 Chlorella sp . 1 .5 ?10 -5g?mL -1 baker' s yeast , 2 ?10 6 cells?mL -1 Chlorella sp . 1 .0 ?10 -5 g?mL -1 baker' s yeast)and two feeding regimes (feeding the M .mongolica mixture of Chlorella sp .and baker' s yeast everyday , or Chlorella sp .and baker' s yeast alternately )were examined in the experiment .There were no significant differences in increment of body length , age at maturity , intervals between broods , brood number , brood size and total reproductive output between the M . mongolica fed with different mixed food using same feeding regimes .Lower daily reproductive output , however , was observed in the individuals fed mixed food containing 1 .0 ?106 cells?mL -1 Chlorella sp .and 2 ?10 -5g?mL -1 baker' s yeast .When fed the mixed food with same composition , the M .mongolica that were fed mixture of Chlorella sp .and baker' s yeast daily did not exhibit significantly different growth and reproduction performances compared to the individuals fed Chlorella sp .and baker' s yeast alternately .The results suggest the mixture of 1 .5 ?106cells?mL -1 Chlorella sp . 1 .0 ?10 -5 g?mL -1 baker' s yeast is a nutritionally adequate food item for M . mongolica , and flexible feeding regime , feeding the animal either with mixture of Chlorella sp .and baker' s yeast daily or with Chlorella sp .and baker' s yeast alternately , can be used in commercial production of M .mongolica .