| 垂钓胁迫对中华倒刺鲃幼鱼群体行为的影响 |
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| 引用本文： | 曾令清,刘小玲,何衍,陈欢.垂钓胁迫对中华倒刺鲃幼鱼群体行为的影响[J].中国水产科学,2021,28(10):1281-1290. |
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| 作者姓名： | 曾令清 刘小玲 何衍 陈欢 |
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| 作者单位： | 重庆师范大学生命科学学院, 动物生物学重庆市重点实验室, 进化生理与行为学实验室, 重庆 401331 |
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| 基金项目： | 国家自然科学基金项目(31300341)； 重庆市教委科学技术研究项目(KJQN201900540, KJQN202000539)； 重庆市留学人员回国创业创新支持计划项目(cx2019153). |
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| 摘 要： | 自然界中鱼类个体因为社会原因集聚的现象称为鱼类群体行为。为考察垂钓胁迫对鲤科鱼类群体行为的影响, 本研究以喜集群的中华倒刺鲃(Spinibarbus sinensis)幼鱼为研究对象, 将大小相近且健康的实验鱼随机分成对照组和垂钓组, 每个处理组包括 18 个鱼群。在(27.3±0.2) ℃水温条件下, 两处理组于垂钓胁迫前(第 0 天)后(第 14 天)在开放水域环境条件下各拍摄 1 次 15 min 的群体行为视频。实验期间, 垂钓组连续垂钓 14 d, 每天垂钓 4 h, 对照组在此期间不进行垂钓。研究发现: (1)垂钓胁迫增加中华倒刺鲃的个体游泳运动速度和个体移动总路程, 降低个体游泳同步性。(2)垂钓胁迫会增加中华倒刺鲃的个体间距离和最近邻距离。(3)虽然垂钓胁迫对中华倒刺鲃的群体运动速度和群体运动时间百分比无影响, 但导致其群体极性下降。(4)中华倒刺鲃的最近邻距离和群体极性呈负相关, 而垂钓胁迫增强二者的相关性。结果表明, 垂钓胁迫降低中华倒刺鲃鱼群的协调性和凝聚力, 对群体运动中个体成员间的信息交流可能产生负面影响。该种鱼群体凝聚力和协调性之间的权衡强度在垂钓胁迫后明显增强, 暗示群体的整体外部轮廓由短梭形向长梭形调整。
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| 关 键 词： | 中华倒刺鲃 垂钓 群体行为 最近邻距离 群体极性 个体游泳同步性 |
Effect of angling stress on the collective behavior of juvenile Qingbo (Spinibarbus sinensis) |
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| ZENG Lingqing,LIU Xiaoling,HE Yan,CHEN Huan.Effect of angling stress on the collective behavior of juvenile Qingbo (Spinibarbus sinensis)[J].Journal of Fishery Sciences of China,2021,28(10):1281-1290. |
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| Authors: | ZENG Lingqing LIU Xiaoling HE Yan CHEN Huan |
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| Institution: | Laboratory of Evolutionary Physiology and Behavior, Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331 , China |
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| Abstract: | Group living is a widespread social phenomenon in animals (e.g., insect swarms, fish shoals, bird flocks, and mammal herds), and their collective behavior is affected by various environmental factors. Intensive human activities, such as angling, have different effects on the group structure and function of the targeted fish shoals. To investigate the effects of angling stress on the collective behavior of cyprinid fish, healthy juvenile Qingbo (Spinibarbus sinensis) with similar body mass were selected as the experimental fish. Our study included two angling treatments (control and angling stress), with each treatment being performed on 18 fish shoals comprising six observers. The collective behavior of shoals subjected to the two treatments in an open water environment was initially videotaped for 15 min before the angling stress (day 0) and again after 14 days of angling stress. The fish in the angling stress group were fished daily for 14 days, whereas those in the control group were not subjected to angling stress. Our results revealed that angling stress can increase the swimming speed of Qingbo individuals and their total individual movement distance; however, it reduced the synchronization of speed. Additionally, angling stress was found to increase both the inter-individual distance and nearest neighbor distance of Qingbo. However, it had no significant effect on the group speed or percentage of time spent on movement in this fish species. Therefore, angling stress could lead to a decline in the group polarization of Qingbo. Furthermore, we detected a negative correlation between the nearest-neighbor distance and group polarization of Qingbo, and the intensity of this correlation was enhanced by angling stress. Our findings suggest that angling stress can reduce the coordination and cohesion of Qingbo shoals, which may have negative effects on information exchange and transmission during group movement. Moreover, in this fish species, the strength of the trade-off between group cohesion and coordination could be enhanced under angling stress. |
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