尾鳍缺失和恢复生长对不同生境的两种鲤科鱼类快速启动游泳能力的影响

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 尾鳍缺失和恢复生长对不同生境的两种鲤科鱼类快速启动游泳能力的影响 DOI: 10.5846/stxb201305171097 作者: 作者单位: 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 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目(31172096);重庆市自然科学基金重点项目(cstc2013jjB20003);重庆市教委科研项目(KJ130624) The effects of caudal fin loss and regeneration on fast-start performance in juveniles of two cyprinid fish species Author: Affiliation: Laboratory of Evolutionary Physiology and Behaviour,Chongqing Key Laboratory of Animal Biology,Chongqing Normal University,Laboratory of Evolutionary Physiology and Behaviour,Chongqing Key Laboratory of Animal Biology,Chongqing Normal University,Laboratory of Evolutionary Physiology and Behaviour,Chongqing Key Laboratory of Animal Biology,Chongqing Normal University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为了考查尾鳍切除及其恢复生长对偏好静水环境的鲫鱼(Carassius auratus)与偏好激流环境的宽鳍鱲(Zacco platypus)两种鲤科鱼类快速启动游泳能力的影响,将鲫鱼幼鱼((6.34 ± 0.02) cm)和宽鳍鱲幼鱼((6.26 ± 0.12) cm)各16尾,其中8尾在(25.0 ± 0.5) ℃的条件下分别进行尾鳍切除、20 d恢复生长、再次切除处理,另外8尾作为对照组;测量计算两种实验鱼的相关形态参数并采用电刺激方式,通过高速摄像机获取实验鱼的影像资料,分析计算后获得快速启动相关参数。结果显示:鲫鱼的细度比(FR)显著小于宽鳍鱲(P < 0.01),尾鳍指数(FI)却显著大于宽鳍鱲(P < 0.01),两种实验鱼的快速启动最大线速度(Vmax)、移动距离(d)、相对旋转半径(RTr)和弯曲指数(BC)均无显著差异;尾鳍切除后,两种实验鱼快速启动的Vmax、d和RTr与正常组相比均呈现显著下降(P < 0.01),其中鲫鱼Vmax下降39%而宽鳍鱲下降24%;经过20 d的恢复生长,两种实验鱼的尾鳍面积均恢复至切除前的60%,而快速启动的Vmax、d、RTr和BC却与正常组(同样经过20 d生长)无显著差异;尾鳍再次切除后与正常组相比,鲫鱼和宽鳍鱲Vmax的下降幅度(17%和9%)与首次切除后的(39%和24%)相比均呈现降低的趋势,其中鲫鱼的下降幅度更大;尾鳍再次切除后与正常组相比,宽鳍鱲的BC显著增大(P = 0.046)。结果表明:(1)鲫鱼尾鳍对快速启动能力的作用大于宽鳍鱲;(2)而偏好急流环境的宽鳍鱲经过恢复生长表现出更加明显的功能补偿现象。 Abstract:Swimming performance is an important capacity for fish species because it is closely related to the ability to gain food, to predator avoidance and to other daily activities. As an important locomotive organ for most fish species, the caudal fin plays a crucial role in propelling and guiding fish during swimming and thus the shape, size and stiffness of the caudal fin are all expected to strongly affect swimming performance. In nature, the caudal fins of fish species are frequently lost to some extent by aggressive behaviour, predation and diseases. To investigate the effects of caudal fin loss and regeneration on fast-start performance of crucian carp (Carassius auratus, inhabiting in still water) and pale chub (Zacco platypus, inhabiting in rip current), 16 juveniles of both crucian carp (body length, (6.27 ± 0.04) cm) and pale chub (body length, (6.14 ± 0.12) cm) were allocated to two groups, respectively. One group (8 fish for each treatment) for the treatment of caudal-fin-amputation-regeneration (20 days) and re-amputation, the other group (8 fish for each treatment) for control. The movement of each fish was recorded by a high-speed camera after an electric stimulation for the analysis of fast-start parameter. Furthermore, the morphological parameters such as body length (L), body height (H), fitness ratio (FR), caudal fin aspect ratio (AR), relative caudal fin area ratio and caudal fin index (FI) in the two cyprinid fish species were measured. The experimental water temperature was maintained at (25.0 ± 0.5)℃. The results showed that the crucian carp showed a significant lower FR and higher FI than pale chub (P < 0.01), but the maximum linear velocity (Vmax), escape distance (d), relative turning radius (TRr) and bending coefficient (BC) showed no significant difference between the two cyprinid fish species. The Vmax, d and TRr during fast-start process of both fish species decreased significantly after caudal fin loss (P < 0.01), with the Vmax of crucian carp decreased by 39% while that of pale chub decreased by 24% after caudal fin loss. After 20 days' recovery, the areas of caudal fin of both fish species recovered about 60% those of the caudal-fin-intact fish. However, the Vmax, d, RTr and BC of both caudal-fin-regenerated crucian carp and pale chub showed no significant difference compared with those of the control groups, respectively. Compared to the caudal-fin-intact fish, the decrease of Vmax of crucian carp and pale chub after the second amputation (17% and 9%) was smaller than the first amputation (39% and 24%). The decrease ratio between the first and the second caudal fin amputation in crucian carp was larger than that of pale chub. However, the bending coefficient (BC) of pale chub increased significantly after the second caudal fin amputation compared with those of fin-intact group (P = 0.046). The results indicated that (1) the caudal fin of crucian carp played a more important role than that of pale chub during fast-start movement; and (2) the pale chub which prefer to rip current habitat showed more significant functional compensation after 20 days' recovery. 参考文献 相似文献 引证文献