There was an error in J. Exp. Biol. (2024) 227, jeb247836 (doi:10.1242/jeb.247836).
In Fig. 2, structural remodeling in the red-eared slider turtle heart following cold acclimation was indicated to increase compact layer thickness. This was misinterpreted from figure 5 of Keen et al. (2016) (doi:10.1152/ajpregu.00510.2015) which shows an increase in collagen content in the compact layer.
Keen et al. (2016) did not directly measure the size of the myocardial layers. To correct this error, the line indicating the increase in compact layer thickness has been removed from Fig. 2. The corrected and original versions of this panel are shown below.
Likewise, in Table 2, remodeling of the turtle heart after cold acclimation was stated to increase compact layer thickness. This cell in the table has been removed.
Both the online full text and PDF versions of the paper have been corrected. The authors sincerely apologize to readers for these errors.