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Population dynamics of Nile Tilapia (<i>Oreochromis niloticus</i>) at Chashma Barrage, Pakistan

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Title Population dynamics of Nile Tilapia (Oreochromis niloticus) at Chashma Barrage, Pakistan
 
Creator Mehak, Ana
Mu, Yongtong
Mohsin, Muhammad
Noman, Muhammad
Nazir, Kiran
 
Subject Growth
Mortality
Population dynamics
Oreochromis niloticus
Pakistan
 
Description 206-210
Growth and mortality parameters of Oreochromis niloticus, 480 samples collected through four research trawls during the months of April, May, June and July of 2014, were evaluated by using FiSAT-II computer package. Length-weight parameters were found to be as W = 0.001 * L 2.144 (R2 = 0.939), where W, L and R2 represents weight, length and coefficient of determination. Computed von Bertalanffy growth functions, ELEFAN method, were L∞ (asymptotic length) = 227.85 mm (FL) and K (growth coefficient) = 0.070 year-1 respectively. Estimated value of t0 (hypothetical length at which age is zero) remained -0.158 year-1 whereas Rn (goodness of fit) was 0.182. Z (annual mortality rate) was evaluated as 1.11 with its 95% confidence interval at (0.74 – 1.49) and M (natural mortality) was 0.16. The value of fishing mortality (F) and exploitation ratio (E) was 0.95 year-1 and 0.85 year-1 correspondingly. Fmax, F0.1 and Fcurrent were evaluated as 0.2 year-1, 0.15 year-1 and 0.15 year-1 correspondingly. Φ (growth performance index) was computed as 3.560. Current study suggests that the capture of this fishery resource should not exceed from current catch level.
 
Date 2017-03-02T05:16:09Z
2017-03-02T05:16:09Z
2017-01
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/40597
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.46(01) [January 2017]