Data for Ojelade et al. "Capture and discard practices associated with an ornamental fishery affect the metabolic rate and aerobic capacity of three-striped dwarf cichlids Apistogramma trifasciata"

Data from the paper entitled "Capture and discard practices associated with an ornamental fishery affect the metabolic rate and aerobic capacity of three-striped dwarf cichlids Apistogramma trifasciata". Fishing causes the direct removal of individuals from wild populations but can also cause a physiological disturbance in fish that are released or discarded after capture. While the sublethal physiological effects of fish capture have been well-studied in commercial and recreational fisheries, this issue has been overlooked for fisheries in the ornamental fish trade, where it is common to capture fish from the wild and then discard non-target species. We examined the metabolic response to capture and discard procedures in the three-stripe dwarf cichlid Apistogramma trifasciata, a popular Amazonian aquarium species that nonetheless may be discarded when not a target species. Individuals (n = 34) were tagged and exposed to each of four treatments designed to simulate typical procedures during the capture and discard process: 1) a non-handling control; 2) netting; 3) netting + 30 seconds of air exposure; and 4) netting + 60 seconds of air exposure. Metabolic rates were then estimated using intermittent-flow respirometry, immediately following each treatment then throughout recovery overnight. Increasing amounts of netting and air-exposure caused an acute increase in oxygen uptake and decrease in available aerobic scope. In general, recovery occurred quickly, with rapid decreases in oxygen uptake within the first 30 minutes post-stress handling. Notably, however, male fish exposed to netting + 60 seconds of air exposure showed a delayed response whereby available aerobic scope was constrained below 75% of maximum until around 4-6 hours post-stress. In addition, larger fish showed a greater initial increase in oxygen uptake post-stress and slower rates of recovery. The results suggest that in the period following discard, this species may experience a reduced aerobic capacity for additional behavioral/physiological responses including feeding, territory defence, and predator avoidance. These results are among the first to examine the impacts of discard practices in the ornamental fishery and suggest that ecophysiological research can provide valuable insight toward increasing sustainable practices in this global trade. File contain data plus a metadata tab explaining each column and the units of measurement.本数据集源自题为《观赏渔业相关捕获与弃置操作对三线矮丽鱼（Apistogramma trifasciata）代谢速率与有氧能力的影响》的研究论文。捕捞活动不仅会直接从野生种群中移除个体，还会对捕获后被放归或弃置的鱼类造成生理扰动。尽管鱼类捕获的亚致死生理效应在商业捕捞与休闲捕捞中已得到充分研究，但观赏鱼贸易中的捕捞相关问题却被忽视——该行业常从野外捕获鱼类，随后弃置非目标物种。 我们以三线矮丽鱼（Apistogramma trifasciata）为实验对象，该物种是广受欢迎的亚马逊水族观赏物种，但若作为非目标物种则常被弃置。研究共选取34尾个体进行标记，并设置4组模拟典型捕获与弃置流程的处理：1）无操作对照组；2）网捕处理；3）网捕+30秒空气暴露；4）网捕+60秒空气暴露。随后采用间歇流式呼吸代谢法估算代谢速率，分别在各处理结束后即刻及后续整夜的恢复过程中进行测量。 网捕与空气暴露时长的增加会导致摄氧量急性升高，同时可用有氧代谢范围显著降低。整体而言，恢复过程进展迅速，应激处理后前30分钟内摄氧量即快速下降。值得注意的是，经网捕+60秒空气暴露处理的雄性个体出现了延迟响应：其可用有氧代谢范围被限制在最大值的75%以下，直至应激处理后约4至6小时才恢复。此外，体型更大的个体在应激后初始摄氧量升幅更高，恢复速率也更慢。 研究结果表明，在被弃置后的一段时间内，该物种应对包括觅食、领地防御与躲避天敌在内的额外行为/生理响应时，其有氧代谢能力可能有所下降。本研究是首批探讨观赏渔业弃置操作影响的成果之一，同时表明生态生理学研究可为提升该全球贸易的可持续运营提供宝贵参考。本数据集包含原始实验数据与元数据标签页，后者详细解释了各数据列的含义与测量单位。