重复垂钓对鲫幼鱼易钓性和能量代谢及个性的影响

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 重复垂钓对鲫幼鱼易钓性和能量代谢及个性的影响 DOI: 10.5846/stxb202106201635 作者: 作者单位: 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(31300341);重庆市自然科学基金项目(cstc2021jcyj-msxm0498);重庆市教委科学技术研究项目(KJQN201900540, KJQN202000539) Effects of repeated angling on vulnerability to angling, energy metabolism and personality of juvenile crucian carp (Carassius auratus) Author: Affiliation: 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:先捕后放是一种重要的鱼类资源保护策略和渔业管理手段。经历先捕后放的被钓鱼类个体的生理与行为会发生变化。当这些个体再次面对人工垂钓诱饵时,可能会呈现更加谨慎的摄饵或鱼钩回避行为。为考察重复垂钓对鱼类易钓性、能量代谢和个性的影响,本研究以鲤科鱼类鲫(Carassius auratus)幼鱼为实验对象,在(25.3±0.1)℃水温条件下对垂钓组和对照组进行3次的能量代谢(标准代谢率,SMR;最大代谢,MMR)和个性(勇敢性、活跃性)测定。其中,垂钓组需进行垂钓实验,而对照组不进行任何垂钓操作。研究发现:(1)重复垂钓显著降低鲫幼鱼的垂钓率,但明显增加单尾平均垂钓时间和整体死亡率。(2)重复垂钓降低鲫幼鱼的体重、肥满度、SMR、MMR、代谢空间(AS)和相对代谢空间(FAS),但整体上不影响勇敢性和活跃性。(3)在测定Ⅰ中,高易钓性个体的体长和开阔区运动时间比大于低易钓性个体,但前者的肥满度小于后者。然而,在测定Ⅱ和Ⅲ中,高易钓性个体的形态参数、能量代谢、个性(勇敢性和活跃性)与低易钓性个体并无差异。研究表明:重复垂钓明显降低鲫幼鱼的易钓性,并且种内个体易钓性的变化方向不尽相同;重复垂钓对鲫幼鱼的形态和有氧代谢能力产生负面影响,可能降低了其用于运动、生长和消化等生理功能的代谢潜能。 Abstract:Catch and release is very popular as fish conservation strategy and fisheries management. The individuals who experience catch and release will have substantial changes in their physiology and behavior. When these individuals are faced with artificial bait again, they may show more cautious bait-taking or hook avoidance behavior. In order to investigate the effects of the repeated angling on vulnerability to angling, energy metabolism and personality of the Cyprinidae, juvenile crucian carp (Carassius auratus) was used for the animal model in our study. The morphology, metabolic rate (e.g., standard metabolic rate, SMR; the maximum metabolic rate, MMR) and personality (e.g., activity and boldness) of both the angling and control group were measured three times at (25.3±0.1) ℃. The individuals of the angling group were subjected to an angling experiment at each trial while fish in the control group did not experience any angling operation. The results show that the angling rate decreased significantly and the average individual angling time increased significantly as the increased of angling times. Repeated angling resulted in a higher death rate in the angling group compared to the control group. The body mass, condition factor, SMR, MMR, aerobic scope, and factorial aerobic scope were significantly decreased by the repeated angling in the angling group compared to the control group, but there were no changes in boldness and activity after the repeated angling. During the first test, high vulnerability to angling phenotype (HVA) had larger body length and movement time in open area, lower condition factor compared to low vulnerability to angling phenotype (LVA). However, during the second and third test, no difference in morphology parameters, energy metabolism, and personality (e.g., boldness, activity) could be detected between the HVA and LVA. Our study suggests that the repeated angling reduces the vulnerability to angling in juvenile crucian carp, and the change direction in vulnerability to angling are different among groupmates with the angling group. Repeated angling decreases aerobic scope of the juvenile crucian fish, which may reduce potential metabolic scope for physiological functions such as exercise, growth and digestion, and ultimately reduce the survival fitness of the individual. 参考文献 相似文献 引证文献