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溶氧水平对草鱼幼鱼快速启动能力的影响

张安杰,曹振东,付世建**   

  1. (重庆师范大学进化生理与行为学实验室， 动物生物学重庆市重点实验室， 重庆 401331)
  • 出版日期:2013-04-10 发布日期:2013-04-10

Effects of dissolve oxygen level on fast-start performance of juvenile grass carp (Ctenopharyngodon idellus).

ZHANG An-jie, CAO Zhen-dong, FU Shi-jian**   

  1. (Laboratory of Evolutionary Physiology and Behavior, Chongqing Key Laboratory of Animal Biology, Chongqing Normal University, Chongqing 401331, China)
  • Online:2013-04-10 Published:2013-04-10

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摘要： 为考查溶氧水平对鱼类快速启动运动能力的影响，本研究在15.0 ℃±1.0 ℃条件下将经过低氧驯化（1.0 mg O2·L-1，48 h）和非低氧驯化的草鱼（Ctenopharyngodon idellus）幼鱼分别在常氧（近饱和约10.0 mg O2·L-1）、2.0和1.0 mg O2·L-1溶氧水平下对实验鱼进行电刺激（0.75 V·cm-1，50 ms），使用高速摄像机拍摄快速启动过程，并计算最大速度（Vmax）、最大加速度（Amax）、160 ms位移（S）、弯曲系数（C）、反应时滞（T）、运动失衡率（L）和电刺激的反应率（R）等相关参数。结果表明：非低氧驯化的实验鱼随着测定环境溶氧水平的下降R降低，Vmax、Amax和T均呈上升趋势，但S和C不变；与非驯化组相比，低氧驯化仅仅导致T增加，对其他参数影响不显著；低氧驯化和环境溶氧水平的下降导致反应率的下降和时滞的延长；低氧驯化显著延长了草鱼的反应时滞可能是由于其神经系统敏感性降低所致；低氧驯化和环境溶氧水平均不会对实验鱼的快速启动运动能力产生显著影响，提示该种鱼在低氧条件下的快速逃逸能力具有相对的保守性。

关键词: 葡萄,  , 冬芽,  , 休眠诱导,  , 诱导因子,  , 呼吸代谢

Abstract:

In order to investigate the effects of dissolved oxygen level on the fast-start performance of juvenile grass carp (Ctenopharyngodon idellus), this paper studied the faststart process of hypoxiaacclimated (1 mg O2·L-1, 48 h) and nonacclimated C. idellus juveniles in normoxia (c. 10.0 mg O2·L-1), 2.0 mg O2·L-1, and 1.0 mg O2·L-1 at 15.0±1.0 ℃. The juveniles were electrically stimulated (0.75 V·cm-1, 50 ms), their faststart process was recorded by high speed camera, and their responsiveness (R), response latency (T), maximum swimming speed (Vmax), maximum acceleration (Amax), 160 ms cumulative distance (S), and curvature coefficient (C) were calculated. As compared with those in normoxia, the R of nonacclimated juveniles in hypoxia decreased, while the Vmax, Amax, and T increased. Dissolved oxygen level had no significant effects on the S or C. Hypoxia acclimation only induced the increase of the T, but had no significant effects on the other measured parameters. It was suggested that hypoxia acclimation and the decrease of dissolved oxygen level could induce the decrease of R and the increase of T, while the increased T in hypoxia could be due to the decreased sensitivity of nervous system in hypoxia. Both the hypoxia acclimation and the dissolved oxygen level showed no significant effects on the faststart performance of the juvenile C. idellus, indicating that the rapid escape performance of the juvenile C. idellus in hypoxic environment was relatively conservative.
 

Key words: grape, bud, dormancy induction, inducing factor, respiratory metabolism.

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