 function                                                                       Lack of preventive actions, e.g., feed less if growth too fast   Genetic selection for slower growth\                                                    \[[@B000-animals-00-00000]\]                                                                                                                                                                                                                                                                                                                            Reduce feed                                                                                                                                                                  Heat stress                                                                           Absence of overheating prevention mechanisms\                                                                High density.\                                                   Fans\                                                                                   \[[@B000-animals-00-00000]\]                                                                                                                                              Absence of heat dissipation mechanisms\                                                                      Poor selection of breeds to put on site                          Reduce density\                                                                                                                                                                                                                                                   Food                                                                                                                                                                          Adapted breeds                                                                                                                                                               Fish                                                                                  Physiological disorders                                                                                      Poor 