Conclusions
The logarithm temperature-dependent development model was selected, in this study, as it was easier to describe than the power model. The model described the curvilinear relationship between temperature and cumulative days after fertilization more adequately than the log-linear regression function used in other studies. The logarithm model was however close enough to the power model. There is potential for increased temperature between 25 and 29°C to significantly reduce hatching period and increase hatchability and fry survival. This being the first research of its kind in O. karongae, it is advisable to apply the model between 25 and 29°C.