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中国农学通报 ›› 2014, Vol. 30 ›› Issue (35): 112-115.doi: 10.11924/j.issn.1000-6850.2014-0867

所属专题: 水产渔业

• 水产 渔业 • 上一篇    下一篇

不同摄食水平哲罗幼鱼排氨率的研究

杨贵强   

  1. 北京市水产科学研究所
  • 收稿日期:2014-03-27 修回日期:2014-12-10 接受日期:2014-05-27 出版日期:2015-03-18 发布日期:2015-03-18
  • 通讯作者: 杨贵强
  • 基金资助:
    农业部公益性行业科研专项“冷水性鱼类养殖产业化研究与示范”(201003055-05);北京市农科院院青年基金“哲罗鲑人工繁殖技术研究” (QNJJ201433);北京市重大项目“冷水鱼繁育关键技术研究”(D121100003712002);北京市项目“北京市鲟鱼、鲑鳟鱼创新团队”(SCSYZ201411-4); 北京市重大项目“北京淡水鱼种质资源保存”(kjcx20140112)

Study on the Ammonia Excretion Rate of The Young Taimen with Different Meal Sizes

  • Received:2014-03-27 Revised:2014-12-10 Accepted:2014-05-27 Online:2015-03-18 Published:2015-03-18

摘要: 为了解摄食水平对哲罗幼鱼排氨率的影响,制定更科学的投喂策略,采用实验生态学方法研究了3个摄食水平(2%、4%、6%)的哲罗(Hucho taimen)幼鱼摄食前后的排氨率。结果显示:摄食后,3个摄食水平的哲罗幼鱼的排氨率均迅速上升,到达最大值后再缓慢下降,最后恢复到各自的初始水平;3个摄食水平的哲罗幼鱼的排氨持续时间(DNR)为(17.0±0.30)、(18.0±0.50)、(19.0±0.60) h,排氨率峰值时间(TNR)为(7.0±0.00)、(7.0±0.20)、(8.0±0.60) h,二者均随着摄食水平的增加而延长;哲罗幼鱼平均排氨率(NRave)和最大排氨率(NRmax)与摄食水平(m)之间的拟合方程分别为:NRave=1.1917+0.1581m(R2=0.9783,2.15%<m<6.36%);NRmax=1.2516+0.2595m(R2=0.9706,2.15%<m<6.36%)。结果表明:哲罗幼鱼养殖过程中要适当的增加投喂次数和减少每次投喂量;伴随着摄食水平增加,哲罗幼鱼体内多余的氨基酸也会增加,外源性排泄也随之升高。

关键词: 组织结构, 组织结构

Abstract: In order to understand the effects of feeding level on ammonia excretion rate of the young taimen (Hucho taimen, Pallas) and formulate more scientific feeding strategies, using the ecological method, the study measured the ammonia excretion rate at three meal sizes. The results showed that, the ammonia excretion rate of three meal sizes were all increased drastically to the maximum, and then decreased slowly to the initial state. DNR and TNR were both prolonged as meal sizes increased. The regression equation of average ammonia excretion rate on the meal size was NRave = 1.1917 + 0.1581m (R2 =0.9783, 2.15%<m<6.36% ). The regression equation of maximum ammonia excretion rate on meal size was NRmax = 1.2516 + 0.2595m (R2 = 0.9706, 2.15%<m<6.36%). The results suggested that it should be appropriate to increase the frequency and reduce feeding amount during the process of juvenile taimen. With the meal size increasing, the amino acids in the body of juvenile taimen increased, and so was the exogenous excretion.