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A. A. Mansour, H., A. H. El-kady, M., H. Abu Almaaty, A., M. Ramadan, A. (2018). Effect of Environmental Pollution on Gonads Histology of the Nile Tilapia, Oreochromis niloticus from Lake Manzala, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 22(5 (Special Issue)), 563-572. doi: 10.21608/ejabf.2018.28005
Hala A. A. Mansour; Mohamed A. H. El-kady; Ali H. Abu Almaaty; Amal M. Ramadan. "Effect of Environmental Pollution on Gonads Histology of the Nile Tilapia, Oreochromis niloticus from Lake Manzala, Egypt". Egyptian Journal of Aquatic Biology and Fisheries, 22, 5 (Special Issue), 2018, 563-572. doi: 10.21608/ejabf.2018.28005
A. A. Mansour, H., A. H. El-kady, M., H. Abu Almaaty, A., M. Ramadan, A. (2018). 'Effect of Environmental Pollution on Gonads Histology of the Nile Tilapia, Oreochromis niloticus from Lake Manzala, Egypt', Egyptian Journal of Aquatic Biology and Fisheries, 22(5 (Special Issue)), pp. 563-572. doi: 10.21608/ejabf.2018.28005
A. A. Mansour, H., A. H. El-kady, M., H. Abu Almaaty, A., M. Ramadan, A. Effect of Environmental Pollution on Gonads Histology of the Nile Tilapia, Oreochromis niloticus from Lake Manzala, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 2018; 22(5 (Special Issue)): 563-572. doi: 10.21608/ejabf.2018.28005

Effect of Environmental Pollution on Gonads Histology of the Nile Tilapia, Oreochromis niloticus from Lake Manzala, Egypt

Article 41, Volume 22, 5 (Special Issue), November 2018, Page 563-572  XML PDF (1.26 MB)
Document Type: Original Article
DOI: 10.21608/ejabf.2018.28005
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Authors
Hala A. A. Mansour; Mohamed A. H. El-kady; Ali H. Abu Almaaty; Amal M. Ramadan
Abstract
Lake Manzala suffers from severe pollution of complex composition from different sources of industrial, agricultural and sewage facilities from the surrounded governorates. The objective of this research was aiming to study the effects of some environmental polluted effluents at five locations of Lake Manzala on the gonads of Oreochromis niloticus. The histological study of testes of O. niloticus showed decreased number of seminiferous tubules with some degenerative changes. They appeared empty from different spermatogenic cells (primary and secondary spermatocytes). Moreover the interstitial cells were collapsed and appeared in all seminiferous tubules. The ovaries presents a deformation from their ideal shapes, thickening and detaching of the membrane of all stages of oocytes and two types of non-bursting atresia in oocytes were markedly appeared. We recommended improving water quality control and the environmental monitoring is essential at Lake Manzala.
Keywords
histology; Oreochromis niloticus; Gonads; pollution; Lake Manzala
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