McInerney Emma P, Byrne Phillip G, Silla Aimee J
Centre for Sustainable Ecosystem Solutions, School of Biological Sciences, University of Wollongong, Wollongong, New South Wales, 2522, Australia.
Centre for Sustainable Ecosystem Solutions, School of Biological Sciences, University of Wollongong, Wollongong, New South Wales, 2522, Australia.
Behav Processes. 2017 Nov;144:46-50. doi: 10.1016/j.beproc.2017.08.012. Epub 2017 Aug 30.
Escape-response behaviour is essential to ensure an individual's survival during a predator attack, however, these behaviours are energetically costly and may cause oxidative stress. Oxidative stress can be reduced by supplementing an individual's diet with exogenous antioxidants or through regular moderate exercise training, which stimulates the upregulation of the endogenous antioxidant system. Two studies have tested the simultaneous effects of dietary antioxidant supplementation and exercise training on animal escape-response behaviour. The present study investigated the effects of dietary carotenoids and exercise training on the escape-response behaviour of Southern Corroboree frogs. Frogs were fed either a carotenoid-supplemented or unsupplemented diet and were exposed to repeated escape-response trials (training) for five consecutive weeks. Carotenoid-supplemented individuals outperformed unsupplemented individuals in initial hopping speed, length of the first hop and hopping distance, however, the performance of frogs in each treatment group became statistically similar after training. Within treatment groups, exercise training significantly improved the hopping speed of unsupplemented frogs, with speeds almost doubling between training weeks one and five. By contrast, exercise training did not significantly improve the hopping speed of carotenoid-supplemented frogs. Our results provide some of the first evidence that exercise training improves escape performance, and that dietary antioxidants may inhibit training-induced benefits.
逃避反应行为对于确保个体在捕食者攻击期间的生存至关重要，然而，这些行为在能量上成本高昂，并且可能导致氧化应激。通过在个体饮食中补充外源性抗氧化剂或通过定期适度的运动训练可以降低氧化应激，运动训练可刺激内源性抗氧化系统的上调。两项研究测试了饮食中补充抗氧化剂和运动训练对动物逃避反应行为的同时影响。本研究调查了饮食中的类胡萝卜素和运动训练对南部灌丛蛙逃避反应行为的影响。给青蛙喂食补充或未补充类胡萝卜素的饮食，并连续五周进行重复的逃避反应试验（训练）。补充类胡萝卜素的个体在初始跳跃速度、第一次跳跃的长度和跳跃距离方面表现优于未补充的个体，然而，在训练后，每个治疗组中青蛙的表现变得在统计学上相似。在治疗组内，运动训练显著提高了未补充类胡萝卜素青蛙的跳跃速度，在训练的第一周和第五周之间速度几乎翻倍。相比之下，运动训练并没有显著提高补充类胡萝卜素青蛙的跳跃速度。我们的结果提供了一些初步证据，表明运动训练可提高逃避性能，并且饮食中的抗氧化剂可能会抑制训练带来的益处。
