摘要
静水缸中稀有鲫 2 40天养殖试验显示 ,A型人工饲料的每对亲鱼产卵次数汉源种群和彭州种群分别为15 2 5和 13 75次 ,相近于水蚯蚓为饲料的 12次和 14 5次 ;A型人工饲料产卵间隔天数分别为 15 98天和 17 46天 ,相近于水蚯蚓为饲料的 2 0 86天和 16 5 6天。循环水缸中稀有鲫 10 5天养殖试验显示 ,A型人工饲料的每对亲鱼产卵次数为 12次 ,低于水蚯蚓为饲料的 2 1 5次 ;产卵间隔天数为 8 75天 ,长于水蚯蚓为饲料的 4 88天。因此 ,用人工饲料可以实现静水缸和循环水缸中稀有鲫的繁殖。静水缸 5种饲料个体每次产卵量有显著差异 (P <0 0 5 ) ,而鱼卵孵化率没有显著差异 (P >0 0 5 )。A和B型饲料产卵量与水蚯蚓接近。循环水缸 4种饲料个体每次产卵量和鱼卵孵化率均有显著差异 (P <0 0 5 )。
Four kinds of artificial feed A, B, C, D and tubificid worm were experimentally used for breeding Gobiocypris rarus. In lentic water tank for 240 days, the number of spawn time and spawn interval of Hanyuan individual and Pengzhou individual of A were 15.25, 13.75 times and 15.98, 17.46 days which were near to 12 and 14.5 times and 20.86, 16.56 days of tubificid worm. While in circle water tank for 105 days, they were 12 times and 8.75 days of A but 21.5 times and 4.88 days of tubificid worm. The results showed that artificial feed A could substitute tubificid worm in both lentic or circle water tanks for breeding Gobiocypris rarus . Besides, in lentic water tank, there were significant differences in individual spawn quantity per time ( P <0.05) but no significant differences in hatch rate among above five feeds ( P >0.05). Spawn quantity of A,B, and tubificid worm was near. In circle water tank, spawn quantity of A, B was less than that of tubifcid worm and the highest spawn quantity revealed in C. There were siginificant differences in hatch rate among A,B,C, and tubificid worm ( P <0.05). Hatch rate of A was close to that of tubificid worm but hatch rate of B, C were lower.
出处
《四川动物》
CSCD
2001年第4期174-176,共3页
Sichuan Journal of Zoology
基金
中国科学院水生生物研究所所长基金 (990 10 3号 )
