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Adaptation mechanism of the adult zebrafish respiratory organ to endurance training

Fig 4

Gill volume and filling factor of gills calculated from micro-CT data.

Left: the total volume of the gills was calculated from micro-tomographic assessment, after selecting a VOI and binarizing the image into gills and background. Data from controls and swimmers, showing a significant increase after 5 weeks of training (p = 0.048, n = 10 for each group). Right: Calculation of the ratio of gills per organ area (see explanation in the text). The swimmers have significantly less gills per organ, e.g. more room between the filaments (p = 0.0088, n = 10). *: p<0.05, **: p<0.01, lines within the plots show the quartiles of the respective distributions.

Fig 4

doi: https://doi.org/10.1371/journal.pone.0228333.g004