International Journal of Fisheries and Aquatic Studies
2018, Vol. 6, Issue 1, Part B
Growth, mortality and yield per recruit of the rabbit fish Siganus rivulatus (Forsskål 1775) in the red sea coast of Jeddah, Saudi Arabia
Author(s): Mohamed Hosny Gabr, Awadh Salem Bakaili and Ahmad Osman Mal
Abstract: The yield per recruit of
Siganus rivulatus in Jeddah fisheries was estimated based on growth parameters and mortality coefficients investigated during the period from April 2013 to May 2014. Growth rates and von Bertallanfy growth parameters were estimated based on age determination using otoliths. The estimated growth parameters were L
∞ = 38.1 cm, K = 0.275 and t
0 = -0.24 year. The length weight relationship could be described by the equation: W = 0.011 L
3.06. Mortality coefficients were estimated as total coefficient 'Z' = 2.04 year
-1, natural coefficient 'M' = 0.413 year
-1, and fishing coefficient 'F' = 1.627 year
-1. The exploitation level 'E' was estimated to be 0.8 year
-1. The yield per recruit estimated at the current level of fishing mortality was 66.715 gm. The maximum yield per recruit (67.8 gm) can be obtained by reducing the current level of fishing mortality to be F
max = 1.0 year
-1. These results indicated that the stock of
Siganus rivulatus in Jeddah fisheries is currently overexploited.
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How to cite this article:
Mohamed Hosny Gabr, Awadh Salem Bakaili, Ahmad Osman Mal. Growth, mortality and yield per recruit of the rabbit fish Siganus rivulatus (Forsskål 1775) in the red sea coast of Jeddah, Saudi Arabia. Int J Fish Aquat Stud 2018;6(1):87-96.
