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饥饿对鲫鱼幼鱼游泳能力的影响

彭韩柳依,曹振东,付世建**   

  1. (重庆师范大学, 进化生理与行为学实验室, 动物生物学重点实验室, 重庆  401331)
  • 出版日期:2014-10-10 发布日期:2014-10-10

Effect of starvation on swimming performance of juvenile crucian carp.

PENGHAN Liu-yi, 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:2014-10-10 Published:2014-10-10

摘要:

为了考察饥饿对鱼类游泳能力的影响,在20 ℃条件下测定了饥饿不同时间(1、14、28 d)的鲫鱼(Carassius carassius)幼鱼的3种游泳能力参数(临界游泳速度,Ucrit;匀加速速度,Ucat;快速启动逃逸速度,Ufast)。结果表明:饥饿时间不同,Ucat分别为Ucrit的131%~152%,而Ufast分别为Ucrit的368%~509%;14~28 d饥饿对Ufast没有显著影响,但导致Ucat和Ucrit分别显著下降14%~32%和24%~29%(P<0.05);Ufast和Ucrit(Ucat)差异在饥饿后增大;由于Ucrit比Ucat对饥饿更为敏感,短期饥饿鲫鱼的Ucat和Ucrit之间的差异也增加;饥饿对活跃代谢率(MO2active)没有显著影响,说明氧气摄取能力不是饥饿鲫鱼Ucrit下降的原因;饥饿的鲫鱼在相同游泳速度下MO2增加,且随游泳速度MO2上升更快(P< 0.05),表明饥饿条件下鲫鱼幼鱼Ucrit的下降主要涉及游泳效率的下降和能量底物的缺乏。

 

关键词: 食物源, 稳定同位素, 营养关系, 食物网结构, 湿地生态系统

Abstract: To investigate the effect of starvation on swimming performance of juvenile crucian carp (Carassius carassius), three different measures of swimming performance (critical swimming speed, Ucrit; constant acceleration speed, Ucat; maximum speed in faststart, Ufast) were measured after different periods of starvation (1, 14 and 28 days) at 20 ℃. The Ucat was 131%-152% that of Ucrit whereas Ufast was 368%-509% that of Ucrit with starvation. Starvation showed no significant effect on Ufast whereas significant decreases of 14%-32% in Ucat and of 24%-29% in Ucrit were observed after 14 and 28 days of starvation. The difference between Ufast and Ucrit(or Ucat) was aggravated after starvation. The difference between Ucrit and Ucat was also aggravated after shortterm starvation (14 days) since Ucrit was more sensitive to starvation than Ucrat. Starvation showed no significant difference in active oxygen consumption rate (MO2active), indicating oxygen  uptake capacity was not the reason for decrease in Ucrit after starvation. Furthermore, starved crucain carp showed higher MO2 at any given swimming speed and more profound MO2 increase with the increase of swimming speed compared to fish in control group, indicating that the decrease of Ucrit under starvation was mainly due to lower swimming efficiency and shortage of substrates.

Key words: stable isotope, food web structure, wetland ecosystem, trophic relationship, food source