Species distribution models are commonly used to determine a species’ probability of occurrence but have not been used to examine the effect of environmental habitat suitability on fish condition, which is considered to be an integrated measure of physiological status. Here, we test for a relationship between oceanographic habitat suitability and the body condition of kingfish (Seriola lalandi) from eastern Australia. We (a) test whether individuals sampled from areas of high‐quality habitat were in better condition than individuals sampled from areas of low‐quality habitat, and (b) assess whether the condition of kingfish responded to oceanographic habitat suitability predicted at varying time‐before‐capture periods. Kingfish habitat was modelled as a function of sea surface temperature, sea‐level anomaly and eddy kinetic energy in a generalized additive modelling framework. Model predictions were made over one‐ to six‐week time‐before‐capture periods and compared to field‐derived kingfish condition data measured using bioelectrical impedance analysis. Oceanographic habitat suitability was significantly correlated with kingfish condition at time‐before‐capture periods ranging from one to four weeks and became increasingly correlated at shorter lead‐times. Our results highlight that (a) fish condition can respond sensitively to environmental variability and this response can be detected using oceanographic habitat suitability models, and (b) climate change may drive extensions in species range limits through spatial shifts in oceanographic habitat quality that allow individuals to persist beyond historical range boundaries without their body condition being compromised.

中文翻译：

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海洋学栖息地的适宜性与沿海中上层鱼类的身体状况呈正相关

物种分布模型通常用于确定物种的发生概率，但尚未用于检查环境栖息地适应性对鱼类状况的影响，鱼类状况被认为是对生理状况的综合衡量。在这里，我们测试了海洋生物栖息地的适宜性与翠鸟（Seriola lalandi）身体状况之间的关系。）来自澳大利亚东部。我们（a）测试从高质量栖息地区域采样的个体是否比从质量低劣栖息地区域采样的个体处于更好的状况，并且（b）评估翠鸟的状况是否对在不同时间预测的海洋生境适应性做出了响应-捕获前的时期。在通用的加性建模框架中，将金鱼栖息地建模为海温，海平面异常和涡动能的函数。在捕捞前的一到六周时间内进行模型预测，并将其与使用生物电阻抗分析法测量的野外国王鱼状况数据进行比较。在捕捞前一到四周的时间里，海洋栖息地的适宜性与翠鸟的状况显着相关，而在较短的交货周期内，海洋生物的适宜性与它们的相关性越来越高。我们的结果表明，（a）鱼类状况可以对环境变化敏感，并且可以使用海洋生境适应性模型检测到这种反应；（b）气候变化可以通过海洋生境质量的空间变化推动物种范围极限的扩展，从而使个体保持超越历史范围的界限而不会损害他们的身体状况。