Biology Reference
In-Depth Information
Fig. 15.
Danio rerio:
(A) Upper panel: The zygotic
vas::egfp
commences to highly express after
16 dpf in females but males of types I, II and III, which began to faintly express, progressively
decrease the expression at different dpf (day post-fertilization). The increasing fl uorescence
intensity suggests the increasing oocyte number and growth of ovarian lumen and shape. In
contrast the decreasing fl uorescence indicates the degeneration of oocytes and transformation
of ovary into testis. (B) Lower panel: A model for gonad differentiation showing high levels of
variation in the intensity, onset and duration of gonad transformation (from Wang et al 2007.
The timing and extent of the juvenile ovary phase are highly variable during zebrafi sh testis
differentiation. J Fish Biol, 70A: 33-44, reproduced by permission of The Fisheries Society of
the British Isles/John Wiley & Sons Ltd)
