Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada | ||||
| Egyptian Journal of Histology | ||||
| Article 14, Volume 43, Issue 4, December 2020, Page 1170-1176 PDF (1.09 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejh.2020.22769.1236 | ||||
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| Authors | ||||
mostafa A. mousa  1; Noha A. Khalil2; Nawal M. El-Gohary3
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| 1national institute of oceanography and fisheries | ||||
| 2Fish Reproduction Laboratory, National Institute of Oceanography and Fisheries, Alexandria, Egypt, | ||||
| 3Faculty of Science, Gazan University, KSA | ||||
| Abstract | ||||
| Introduction: The detailed description of larval and juvenile stages of L. ramada is so far lacking. Aim of the Work: The present study aimed to describe larval development and the morphological transition to the juvenile stage in L. ramada after artificial spawning. Material and Methods: In this study, we described early development of Liza ramada over the early rearing period of 63 days post-hatching. Results: The newly hatched larvae have closed mouth and anus. At seven days post-hatching, the larvae have opened mouth and both yolk sac and oil globules disappeared. At 14 days, larvae have a distinct fins and increased skin pigmentation. At 21 days post-hatching, the larvae have variable coloration with more density. At 28 days post-hatching, the body depth of larvae increased and the stomach contains some food indicating the larval ability to digest external food. In 35 days-old larvae, the eyes become fully pigmented. At 42 days post-hatching, the larvae have high density of pigmentation all over the body and transparent caudal fin with rays. At 49 days post-hatching, the body of juvenile is distinctly elongated and laterally compressed with obvious scales. By 56 days post-hatching, the fish is covered with scales and well-developed rays. At 63 days post-hatching, the body becomes large and completely covered with scales and high density of pigmentation. The larvae begin transformation to juvenile stage at 42 days post-hatching and then finished the transformation at 63 days post-hatching. Importantly, the juvenile stage of L. ramada can be handled safely at 63 days post-hatching. Conclusion: The juvenile’s production of L. ramada requires a period of 63. | ||||
| Keywords | ||||
| Early development; liza ramada larvae; thin-lipped mullet | ||||
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