Study of embryonic development and evolution stages of Yellow fin sea bream (Acanthopagrus latus) .

ABSTRACT: In present survey development and evolution stages of Yellow fin sea bream (Acanthopagrus latus) fetus in two averages temperature 21 and 24 centigrade degree were studied. The brooders were collected from fishery grounds of south of Persian Gulf.Average diameter of lipid globule was 185±0.005 micron and eggs diameter after fertilization were 740.33±0.012. Length of newly birth larvae was 1679.34 microns. Incubation period in 24 ?C was 26 hours and 15 minutes. During the incubation 2-cells stage was observed at 20 minutes.Embryonic evolution stages were distinguished in these study as follows: 1:Two-Cells Blastomere, 2 four -Cells Blastomere , 3: eight -Cells Blastomere, 4: sixteen - Cells Blastomere, 5: Thirty two -Cells Blastomer, 6: Morula, 7: High Blastula Stage 8: Flat Blastula Stage, 9: Starting of Gastrulation, 10: Gastrulation, 11: Neurula, 12: Observation Embryo Profile , 13: Closing of blastopore, 14: The Formation of Somite , 15: The Appearance of Heart , 16: The Formation of Optic Cup, 17: Increasing of Pigmentation, 18: Hatching (10%) , 19: Hatching (100%)