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Assessment of Optimum Salinity Level for Maximum Growth and Survival of Nile Tilapia, Oreochromis niloticus (Linnaeus 1758)

Assessment of Optimum Salinity Level for Maximum Growth and Survival of Nile Tilapia, Oreochromis niloticus (Linnaeus 1758)

Abdul Malik1,2, Ghulam Abbas1,*, Abdul Ghaffar3, Ghulam Dastagir4, Sara Ferrando5, Lorenzo Gallus5, Asad Ali Muhammad1,6, Abdul Jabbar2 and Khalil-ur-Rehman2 

1Centre of Excellence in Marine Biology, University of Karachi, Karachi
2 Livestock and Fisheries Department, Directorate of Fisheries Sindh, Govt. of Sindh, Karachi
3Department of Life Sciences, The Islamia University of Bahawalpur, Bahawalpur
4Department of Zoology, University of Baluchistan, Quetta
5Department of Earth, Environment and Life Sciences, University of Genoa, Italy
6Coastal Development and Fisheries Department, Government of Baluchistan, Quetta

*      Corresponding author: ghulamabbas@uok.edu.pk

 

Fig. 1.

Growth performance of Nile tilapia in terms of weight gain (A), specific growth rate (B), condition factor (C), survival rate (D), feed conversion ratio (E) and weight gain, % of initial weight (F) at different salinity levels for 50 days.

Fig. 2.

Regression among the growth parameters of Nile tilapia in terms of weight gain (A), specific growth rate (B), condition factor (C), survival rate (D), feed conversion ratio (E) and weight gain, % of initial weight at different salinity levels for 50 days.

Fig. 3.

Log total length (cm) and log body weight (g) relationship of Nile tilapia (Oreochromis niloticus) fingerlings reared at different salinity levels (A-E) for 50 days.

Fig. 4.

Blood smear of Nile tilapia fingerlings (Oreochromis niloticus) reared on different salinity levels (A=15‰, B=20‰, C=25‰, D=30‰, E=35‰). Arrow, micronucleus (Giemsa stained: 1000X).

Fig. 5.

Water quality parameters: A) temperature (°C), B) dissolved oxygen, C) pH and D) ammonia of the experimental tanks.

Pakistan Journal of Zoology

June

Vol. 50, Iss. 3, Pages 799-1198

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