Fig. 2: Relationships between reef fish carbonate excretion rates, fish traits, and temperature. | Nature Communications

Fig. 2: Relationships between reef fish carbonate excretion rates, fish traits, and temperature.

From: Temperature, species identity and morphological traits predict carbonate excretion and mineralogy in tropical reef fishes

Fig. 2

Marginal effect of (a) body mass, (b) water temperature, (c) caudal fin aspect ratio (AR), and (d) relative intestinal length (RIL) after controlling for the remaining fixed and group-level effects of a Bayesian multilevel distributional regression model by standardising the other predictors at their mean values. Thick, black lines represent the mean predicted fits, whereas thin, grey lines represent 1000 draws randomly chosen from the posterior fits and show model fit uncertainty. Model predictions are for natural-log transformed excretion rates, but here show the fitted functions on the original scale of the data. Raw data are displayed as marks along the x-axis. In (a), the red dashed line represents isometric scaling (β = 1). In each panel, silhouettes show the number of fish required to excrete the same amount of carbonate at two levels of the predictor variable, which are also shown as matching symbols on the mean predicted fits. All silhouettes were drawn by MG and based on photographs taken by J.E. Randall and sourced from FishBase78. Data underlying the figures are available in the Zenodo repository (https://doi.org/10.5281/zenodo.7530455)93.

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