Fig. 4.
Sexual maturation stages in females of Johnius taiwanensis. (a) Immature/resting (F1) (17.2 cm SL, November 2016); (b) developing (F2) (15.2 cm SL, April 2017); (c) maturing (F3) (16.6 cm SL, September 2016); (d) ripe (F4) (16.8 cm SL, July 2016); (e) ripe (F4) (16.5 cm SL, August 2016); (f) spent (F5) (14.2 cm SL, July 2016). AO3, atretic vitellogenic stage oocyte; BV, blood vessels; GW, gonadal wall; HO, hydrated oocyte; LA, lamellae; O1, primary growth stage oocyte; O2, cortical-alveolar stage oocyte; O3, vitellogenic stage oocyte; OL, ovarian lumen; POF, post-ovulatory follicle. Scale bars: a-c = 200 μm; d-f = 50 μm.