Fig. 2.
Influence of cold acclimation on collagen composition in the compact and spongy myocardium of zebrafish, Danio rerio. (A) Area, calculated as μm2, occupied by each of the four collagen fiber types in the compact myocardium and spongy myocardium within the middle cross-section of hearts from control (27 °C) and cold-acclimated (20 °C) zebrafish. Red denotes the thickest/densest fibers, while green denotes the thinnest. *Values of the same fiber type in the same myocardial layer are significantly different between treatment groups (P < 0.05); n = 9 for all measurements. Figure modified from (Johnson et al., 2014). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)