Field metabolic rates of teleost fishes are recorded in otolith carbonate
Field metabolic rates of teleost fishes are recorded in otolith carbonate
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DOI：
10.1038/s42003-018-0266-5
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发表时间：
2019-01-18
影响因子：
5.9
通讯作者：
Gronkjaer, Peter
中科院分区：
文献类型：
--
作者：
Chung, Ming-Tsung;Trueman, Clive N.;Gronkjaer, Peter
野外代谢率（FMR）是了解个体和种群水平对环境变化响应的关键，但在野外条件下，特别是在水生环境中，很难测量。在这里，我们表明FMR可以直接从鱼耳石中的碳同位素组成（δ C-1(3)oto）来估计。本文描述了δ C-13（oto）值与耗氧速率之间的关系，并报告了大西洋鳕鱼（Gadus morhua）个体耗氧速率与δ C-13（oto）值之间的实验室实验结果。我们将新的delta(13)C（oto）代谢代理应用于现有的来自野生鳕鱼和四种深水鱼类的delta(13)C（oto）数据，以检验推断的FMR估计的有效性。δ (13) C（oto）代谢物为研究放养野生鱼类的生理生态提供了新的途径。基于耳石的FMR代理尤其有希望，因为它们可以在单个鱼的生活史中对时间集成的个体水平的FMR进行回顾性评估。
Field metabolic rate (FMR) is key to understanding individual and population-level responses to environmental changes, but is challenging to measure in field conditions, particularly in aquatic environments. Here we show that FMR can be estimated directly from the isotopic composition of carbon in fish otoliths (delta C-1(3)oto). We describe the relationship between delta C-13(oto) values and oxygen consumption rate, and report results from laboratory experiments relating individual-level measurements of oxygen consumption rates to delta C-13(oto) values in Atlantic cod (Gadus morhua). We apply our new delta(13)C(oto )metabolic proxy to existing delta(13)C(oto )data from wild cod and four deepwater fish species to test the validity of inferred FMR estimates. The delta(13) C(oto )metabolic proxy offers a new approach to study physiological ecology in free-ranging wild fishes. Otolith-based proxies for FMR are particularly promising as they allow retrospective assessment of time-integrated, individual-level FMR throughout an individual fish's life history.