四种饵料对瘤背石磺生殖性能的影响

Effect of four diets on reproductive performance of broodstock Onchidium struma

比较了螺旋藻粉（A组）、玉米粉（B组）、面粉（C组）和发酵猪粪（D组）四种饵料对成体瘤背石磺摄食、成活、产卵量和卵质量的影响。结果表明，（1）不同饵料对亲本的成活率无显著影响，各组成活率均在90％以t，面粉对亲本瘤背石磺具有较好的诱食性，发酵猪粪组的瘤背石磺摄食量较小；（2）B、C两组亲本的产卵总量明显大于A、D两组，其平均产卵量分别为每只亲本7．27×10^4个和6．79×10^4个，A、D两组亲本的平均产卵量仪为B、C两组的70％左右。B、C两组亲本的产卵高峰出现在8月26日左右，而A、D两组则出现在8月28—30日之间；（3）A组胚胎发育速度较快，孵化率达73．97％，显著高于其它三组（P〈0．05），C组孵化率次之（38．26％），D组胚胎孵化率最低（7．71％），且胚胎发育不同步，孵化时间长达19—22d。由此可见，面粉和玉米粉有利于提高瘤背石磺亲本的产卵量，螺旋藻粉组亲本的胚胎具有较高的孵化率。

The study was conducted to investigate the effects of Spirulina meal （A）, corn meal （B）, wheat flour（C） and fermented pig manure（D） on feeding, survival, egg production and egg quality of broodstock Onchidium struma. The results indicated that, （ 1 ） there wasn＇ t significant difference on survival rate among four groups with survival rate of more than 90% in all groups. The broodstock Onchidium struma seemed to like to eat wheat flour, while they eat less fermented pig manure than other diets. （2）The broodstock of group B and group C had more total egg production than group A and group D, and average egg production per individual of group A and group D was only 70% of those of group B and group C. The spawning peak of group A and group D occurred on August 26, while that of group B and group C occurred from August 28 to 30. （3）The embryo produced by group A developed quicker than those eggs produced by other groups. The hatching rate of group A was 73.97% , which was higher than that of other three groups （P 〈 0.05 ）. The eggs produced by group C had higher hatching rate than those produced by group B and group D. The lowest hatching rate could be found in group D （7. 71%）, whose embryo developed asynchronously with long hatching period of 19 -22 days. In conclusion, wheat flour and corn meal can improve the egg production of broodstock Onchidium struma, while the group fed Spirulina meal has higher hatching rate than other groups.