Fig. 8
From: Embryogenesis and early larval development in bocachico (Prochilodus magdalenae) in Colombia
A Prochilodus magdalenae hatching period and early larval development. Morphological development of larvae from 1 day post-hatch (DPH) to 4 DPH. Abbreviations: E: eye; O: otic cup; YS: yolk sac; OT: otolith. B Prochilodus magdalenae. (A) Endogenous feeding period: The yolk sac is seen; the digestive tract is a straight tube; retinal pigmentation starts; retina become multilayer structure; gill anlage visible; mouth gap increases and the mouth arrives at the subterminal position; and jaw structures are well defined, H&E 4X. (B) Endo–exogenous feeding period: remains of yolk sac are present; esophagus, stomach and kidney are evident, H&E 20X. (C) Exogenous feeding period: The yolk sac fully depletes; myotomes are W-shape. Esophagus, stomach, liver, pancreas and kidney are evident H&E 10X. Abbreviations: BA: branchial arches; GF: gill filaments; ES: esophagus; E: eye; J: jaw; LI: liver; M: mouth; MG: mouth gap; MYO: myotome; NA: narines; PA: pancreas; R: retina; RY: yolk remains; ST: stomach; YS: yolk sac; KI: kidney