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首页> 外文期刊>Marine and Freshwater Behaviour and Physiology >Hypoxia impairs the digestive advantage of individual southern catfish (Silurus meridionalis) with high resting metabolic rates and postprandial metabolic responses
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Hypoxia impairs the digestive advantage of individual southern catfish (Silurus meridionalis) with high resting metabolic rates and postprandial metabolic responses

机译：缺氧会损害单个southern鱼（Silurus meridionalis）具有较高的静息代谢率和餐后代谢反应的消化优势

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Empirical studies suggest that individuals with a high resting metabolic rate (RMR) are at an advantage under favourable conditions because they digest food rapidly and exhibit a greater growth potential. However, we hypothesised that high-RMR individuals have less energy available for digestion under hypoxia than they do under normoxia due to their relatively high maintenance cost. To test this hypothesis, we measured the RMR and postprandial metabolic responses of juvenile southern catfish, Silurus meridionalis, under normoxia and moderate hypoxia. The results provided the first evidence that ⑴ both the RMR and postprandial metabolic rate showed repeatability across different water [O_2] conditions and ⑵ the correlation between the RMR and postprandial metabolic traits differs with changes in environmental factors (water [O_2]). These findings suggested that the digestive advantage of individual southern catfish with a high RMR is impaired under hypoxia.
机译：实证研究表明，具有较高静息代谢率（RMR）的个体在有利条件下处于优势地位，因为它们可以快速消化食物并具有更大的增长潜力。但是，我们假设，高RMR个体在低氧条件下的消化能量要比常氧条件下低，因为他们的维护成本较高。为了检验该假设，我们测量了在常氧和中度低氧条件下，南方southern鱼Silurus meridionalis的RMR和餐后代谢反应。结果提供了第一个证据：the RMR和餐后代谢率均显示了在不同水[O_2]条件下的可重复性，并且the RMR与餐后代谢性状之间的相关性随环境因素（水[O_2]）的变化而不同。这些发现表明，在低氧条件下，具有较高RMR的南方southern鱼的消化优势受到损害。

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