Histology of the oocytes of Lutjanus peru (Nichols and Murphy, 1922) (Pisces : Lutjanidae)

Abstract

The distinctive characteristics found in each of the development stages of the oocyte in the ovary of Lutjanus peru (Pacific red snapper) are described. The histological technique was used to identify the development stages of the oocytes and the averages of the diameters of the oocytes were obtained for these stages. Stage I, chromatin nucleolus oocyte: average diameter of 52.89 mum. Stage II, perinucleolus oocyte: average diameter of 117.78 mum. Stage III, yolk vesicle oocyte: average diameter of 166.18 mum. Stage IV, primary vitellogenesis oocyte: average diameter of 221.73 mum. Stage V, secondary vitellogenesis oocyte: average diameter of 333.7 mum. Stage VI, tertiary vitellogenesis oocyte: average diameter of 340.17 mum. Stage VII, mature oocyte: average diameter of 340.17 mum. With the identification of these stages, the observation of the process of the oogenesis in L. peru has been completed.