Monthly samples of Oreochromis niloticus from the River Nile at Beni Suef were collected during the period from January 2009 to December 2010. The Von Bertalanffy growth function parameters were: 𝐋∞ = 48.14 cm, K = 0.147 𝐲𝐫−𝟏, and 𝐭𝟎 = 0.2237 year. The total mortality coefficient (Z) was calculated as 0.9654 𝐲𝐫−𝟏, the natural computed mortality coefficient (M) was 0.4010 𝒚𝒓−𝟏 with fishing mortality (F) estimated as 0.5643 𝐲𝐫−𝟏 and exploitation ratio (E) calculated as 0.5819. This high exploitation ratio shows that the stock of Oreochromis niloticus from the River Nile at Beni Suef is overexploited.
Hassan, A., & El-Kasheif, M. (2013). Age, growth and mortality of the cichlid fish Oreochromis niloticus (L.) from the River Nile at Beni Suef Governorate, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 17(4), 1-12. doi: 10.21608/ejabf.2013.2181
MLA
Adel Hassan; Midhat El-Kasheif. "Age, growth and mortality of the cichlid fish Oreochromis niloticus (L.) from the River Nile at Beni Suef Governorate, Egypt", Egyptian Journal of Aquatic Biology and Fisheries, 17, 4, 2013, 1-12. doi: 10.21608/ejabf.2013.2181
HARVARD
Hassan, A., El-Kasheif, M. (2013). 'Age, growth and mortality of the cichlid fish Oreochromis niloticus (L.) from the River Nile at Beni Suef Governorate, Egypt', Egyptian Journal of Aquatic Biology and Fisheries, 17(4), pp. 1-12. doi: 10.21608/ejabf.2013.2181
VANCOUVER
Hassan, A., El-Kasheif, M. Age, growth and mortality of the cichlid fish Oreochromis niloticus (L.) from the River Nile at Beni Suef Governorate, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 2013; 17(4): 1-12. doi: 10.21608/ejabf.2013.2181
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