HISTOLOGICAL AND ULTRASTRUCTURAL OBSERVATIONS ON GILLS OF TILAPIA NILOTICA L. (OREOCHROMIS NILOTICUS) IN LAKE QARUN, FAYOUM PROVINCE, EGYPT | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 9, Volume 7, Issue 4, September 2003, Page 157-181 PDF (6.81 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2003.1790 | ||||
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| Authors | ||||
| Hoda Shoman1; Hanan Gaber22 | ||||
| 1Zoology Department. Faculty of Science, Al-Azhar University for Girls, Nasr City, Egypt, | ||||
| 2National Institute of Oceanography and Fisheries, Fish Research Station, Egypt. | ||||
| Abstract | ||||
| Fish productivity has been affected by a progressive increase of salinity and pollution in Lake Qarun. So. this work aimed to investigate the histology and ultrastructure of the gills of Tilapia nilotica to clarify the possible effect of water quality on the fish gills. The most observed changes include the occurrence of a prominent large number of chloride and mucous cells confined to gill filament, hyperplasia of primary lamellar epithelium which leads to obliteration of some interJamellar spaces between adjacent secondary gill lamellae, odema resulting in the separation of respiratory epithelium and inflammatory infiltration including eosinophils and macrophages. These findings demonstrate that Tilapia nilotica can adapt to poor conditions through cellular and histological changes. | ||||
| Keywords | ||||
| histology; ultrastructural. gilts; Tilapia nilotica; Lake Qarun | ||||
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