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通过性激素药物诱导和人工繁育技术对哲罗鲑(Hucho taim en)(HH)(♀)与细鳞鲑(Brachymystaxlenok)(BB)(♂)进行了远缘杂交。研究结果表明:哲罗鲑(♀)×细鳞鲑(♂)杂交种(HB)的人工繁育效果与双亲对照组(HH和BB)不存在显著性差异(P>0.05),且HB的孵化率和仔鱼上浮率均高于HH和BB;选择水蚤和水丝蚓对HB鱼苗进行开口,采用全价饲料粉与水丝蚓的混合团进行过渡,再选用全价人工颗粒饲料进行驯化,驯化结果显示:BB最易于开口、驯化和摄食颗粒饲料,其次是HB,最难于驯化的是HH;HH、HB和BB经过6周的培育,其全长与体质量均呈正增长趋势变化,HB的体质量增长较HH和BB分别快25%、70%。HB的体长、体质量与周龄的最佳方程分别为Y=0.022x2+0.52x+7.30(R2=0.987 4)和Y=2.817 1e0.254 1x(R2=0.987 7),体长与体质量的最佳方程为Y=-0.002 4x3+0.051x2+0.42x+7.4(R2=0.987 5),HB的日增重为(0.30±0.13)g,分别高于HH和BB。
Distant hybridization was performed on Hucho taim en (HH) (♀) and Brachymystaxlenok (BB) (♂) by sex hormone drug induction and artificial breeding techniques. The results showed that there was no significant difference (P> 0.05) between the artificial breeding effect of Merrette (♀) × Brachymystax (♂) hybrids (HB) and the parental control (HH and BB) Rate and larvae floating rate were higher than the HH and BB; select Daphnia and Hydatidiformis to the HB fry opening, the full price of feed powder and water wireworms mixed group transition, and then use the full price of artificial pellets domesticated, The domestication results showed that: BB was the easiest to open, domesticated and ingested pellet feed, followed by HB and the hardest to acclimate to HH. After 6 weeks incubation, HH, HB and BB showed a positive growth trend in both total length and body weight. HB The body weight gain was 25% and 70% faster than HH and BB, respectively. The best equation of body length and body mass and age of HB were Y = 0.022x2 + 0.52x + 7.30 (R2 = 0.987 4) and Y = 2.817 1e0.254 1x (R2 = 0.987 7) The best equation of mass was Y = -0.002 4x3 + 0.051x2 + 0.42x +7.4 (R2 = 0.987 5). The daily gain of HB was (0.30 ± 0.13) g, higher than HH and BB, respectively.