A new analysis of hypoxia tolerance in fishes using a database of critical oxygen level (P crit).
A new analysis of hypoxia tolerance in fishes using a database of critical oxygen level (P crit).
复制标题
使用临界氧气水平（P Crit）数据库对鱼类低氧耐受性的新分析。
DOI：
10.1093/conphys/cow012
复制
发表时间：
2016
影响因子：
2.7
通讯作者：
Wilson RW
中科院分区：
文献类型：
--
作者：
Rogers NJ;Urbina MA;Reardon EE;McKenzie DJ;Wilson RW
数据汇编从文献上的临界氧水平（Pcrit），耐缺氧性状，包括96项研究，涵盖151鱼类从58个家庭。盐度、温度、体重和常规代谢率与Pcrit高度相关。温度，二氧化碳，酸化，金属和喂养的影响也进行了评估。缺氧是水生生境中常见的现象，它正在成为一种日益频繁和广泛的环境扰动，主要是由于人为的营养富集和气候变化。需要深入了解鱼类的耐缺氧能力，以及这在个体和物种之间的差异，以便准确预测未来的生态影响，并为养护和渔业管理提供更好的信息。临界氧水平（Pcrit）已被广泛用作低氧耐受的量化指标。其定义为低于该氧水平时，动物不能再保持稳定的氧摄取速率（氧调节），并且摄取变得依赖于环境氧可用性（动物转变为氧适应）。一个全面的数据库Pcrit值，包括331个测量96个已发表的研究，涵盖151种鱼类从58个家庭，提供了最广泛的和最新的分析缺氧耐受硬骨鱼。用于确定Pcrit的方法进行了严格的检查，以评估其作为鱼类耐缺氧指标的实用性。分析了与缺氧相互作用的各种非生物和生物因素对Pcrit的影响，包括温度、CO2、酸化、有毒金属和摄食。盐度、温度、体重和常规代谢率与Pcrit密切相关; Pcrit数据集中20%的变异可由这四个变量解释。一个重要的方法问题，以前没有考虑的是不一致的增加，在一个封闭的呼吸计内的二氧化碳分压在测量过程中的Pcrit。模型表明，最终达到的CO2分压可能在650至3500 µatm之间变化，具体取决于环境pH值和盐度，对血液酸碱平衡和Pcrit本身可能产生重大影响。 该数据库将成为一个可广泛访问的生理特征数据库的一部分，作为促进今后鱼类生态、养护和管理研究的资源。
Data were compiled from the literature on the critical oxygen level (Pcrit), a hypoxia-tolerance trait, comprising 96 studies covering 151 fish species from 58 families. Salinity, temperature, body mass, and routine metabolic rate were highly correlated with Pcrit. The effects of temperature, CO2, acidification, metals and feeding are also assessed. Hypoxia is a common occurrence in aquatic habitats, and it is becoming an increasingly frequent and widespread environmental perturbation, primarily as the result of anthropogenic nutrient enrichment and climate change. An in-depth understanding of the hypoxia tolerance of fishes, and how this varies among individuals and species, is required to make accurate predictions of future ecological impacts and to provide better information for conservation and fisheries management. The critical oxygen level (Pcrit) has been widely used as a quantifiable trait of hypoxia tolerance. It is defined as the oxygen level below which the animal can no longer maintain a stable rate of oxygen uptake (oxyregulate) and uptake becomes dependent on ambient oxygen availability (the animal transitions to oxyconforming). A comprehensive database of Pcrit values, comprising 331 measurements from 96 published studies, covering 151 fish species from 58 families, provides the most extensive and up-to-date analysis of hypoxia tolerance in teleosts. Methodologies for determining Pcrit are critically examined to evaluate its usefulness as an indicator of hypoxia tolerance in fishes. Various abiotic and biotic factors that interact with hypoxia are analysed for their effect on Pcrit, including temperature, CO2, acidification, toxic metals and feeding. Salinity, temperature, body mass and routine metabolic rate were strongly correlated with Pcrit; 20% of variation in the Pcrit data set was explained by these four variables. An important methodological issue not previously considered is the inconsistent increase in partial pressure of CO2 within a closed respirometer during the measurement of Pcrit. Modelling suggests that the final partial pressure of CO2 reached can vary from 650 to 3500 µatm depending on the ambient pH and salinity, with potentially major effects on blood acid–base balance and Pcrit itself. This database will form part of a widely accessible repository of physiological trait data that will serve as a resource to facilitate future studies of fish ecology, conservation and management.