mousa, M., Khalil, N., El-Gohary, N. (2020). Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada. Egyptian Journal of Histology, 43(4), 1170-1176. doi: 10.21608/ejh.2020.22769.1236
mostafa A. mousa; Noha A. Khalil; Nawal M. El-Gohary. "Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada". Egyptian Journal of Histology, 43, 4, 2020, 1170-1176. doi: 10.21608/ejh.2020.22769.1236
mousa, M., Khalil, N., El-Gohary, N. (2020). 'Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada', Egyptian Journal of Histology, 43(4), pp. 1170-1176. doi: 10.21608/ejh.2020.22769.1236
mousa, M., Khalil, N., El-Gohary, N. Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada. Egyptian Journal of Histology, 2020; 43(4): 1170-1176. doi: 10.21608/ejh.2020.22769.1236
Morphological Study of Larval Development and the Transition to Juvenile Stage in Thin-Lipped Mullet, Liza Ramada
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.
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