摘要
为了考查繁殖期不同性别鲫鱼(Carassius auratus)的运动能力及生理代谢特征,在20±1℃条件下,分别依次测定1龄且处于繁殖第Ⅲ期不同性别实验鱼的快速启动、临界游泳速度(Ucrit)、静止代谢率(MO2rest)、最大运动代谢率(MO2active)及运动过程中的代谢率(MO2)。结果表明:鲫鱼雌鱼与雄鱼的临界游泳速度(Ucrit)分别为6.97±0.22、7.29±0.31BL.s-1,差异不显著;雌、雄鱼快速启动中的最大运动速度(Vmax)分别为20.48±0.69、20.40±1.09BL.s-1,无显著差异,同时它们的最大加速度(amax)、反应时间、120ms内移动距离同样均无显著差异;雌鱼与雄鱼的MO2rest差异不显著;MO2active与代谢空间(△MO2)分别为341.92±22.59、307.50±22.66mgO2.kg-1.h-1和257.18±18.51、220.20±18.95mgO2.kg-1.h-1,前者均显著高于后者(P<0.01)。可见,处于繁殖Ⅲ期的鲫鱼雌鱼与雄鱼的Ucrit及快速启动均无显著差异;并且雌鱼有氧运动能力的维持存在功率补偿。
To examine whether the swimming performance and metabolic traits of 1-year-old male and female crucian carps （Carassius auratus） during their Ⅲ reproduction phase have differences, the fast-start movement, critical swimming speed （Ucrit）, rest metabolic rate （MO2rest）, active metabolic rate （MO2active）, and metabolic rate （MO2） during different swimming speeds were measured at water temperature 20±1 ℃. The Ucrit of female and male crucian carps was 6.97±0.22 and 7.29±0.31 BL·s^-1, and the maximum linear velocity during fast-start movement （Vmax） was 20.48±0.69 and 20.40±1.09 BL·s^-1, respectively, with no significant differences. The Ucrit, Vmax, maximum linear acceleration during fast-start movement （amax）,reaction time, migration distance during the first 120 ms of faststart movement, and MO2rest of female and male crucian carps also had no significant differences. However, the MO2active and metabolic scope of female crucian carps were significantly higher than those of the males （341.92±22.59 vs. 307.50±22.66 mg O2·kg^-1·h^-1 and 257.18±18.51 vs. 220.20±18.95 mg O2·kg^-1·h^-1, respectively）. It was suggested that the male and female crucian carps during their Ⅲ reproduction phase had no significant difference in the swimming capacity, but the females adopted metabolic up-regulation strategy as a compensation for their increased energy burden due to reproduction status.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第10期2606-2612,共7页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31172096)
重庆科技创新能力建设项目(CSTC2010CA1010)资助
关键词
性别差异
运动能力
能量代谢
繁殖Ⅲ期
鲫鱼
sex difference
swimming ability
energy metabolism
the m reproduction phase
crucian carp （Carassius auratus）.
