Studying of Some Biological Characteristics of Horse Mackerel Trachurus trachurus (Linnaeus, 1758) in Syrian Waters (Eastern Mediterranean)

R.M. Othman¹ , M.Y. Galiya² , Z.A. Almajid³

Section:Research Paper, Product Type: Journal-Paper
Vol.9 , Issue.2 , pp.48-52, Apr-2022

Online published on Apr 30, 2022

Copyright © R.M. Othman, M.Y. Galiya, Z.A. Almajid . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
The aim of this study was to estimate the age, the growth rate and the length – weight relationship of Horse Mackerel (T.trachurus). Around 401 individuals of this species were collected and analyzed from two sites of the Syrian Coast: with 198 individuals from the Ras Albasit and 203 individuals from the Burj Islam. The standard lengths of individuals in samples were 11.4-25.4 cm with average of 17.71± 2.76 cm, and weights were 23.53 - 301.03g with average of 111.23±36.52g. Age was estimated by the scales, applied length-weight relationship: and used Von-Bertalanffy growth equation : to estimate (L , K). Age ranged from (1- 4) years. In Ras Albasit: The length – weight relationship was estimated for female: b = 2.87(N=104), R2 = 0.87, and for male: b = 2.79 (N = 94), R2 = 0.93. The whole sample: b = 2.78(N=198) , R2 = 0.89 indicating that allometric growth and relationship are strong positive. In Burj Islam: The length – weight relationship was estimated for female: b=2.88(N=109), R2 =0.84, and for male: b = 2. 94 (N=94), R2 = 0.95. The whole sample: b = 2.90(N=198), R2 = 0.89 indicating that allometric growth and relationship are strong positive. Growth parameters for female: L = 35.51 cm, K=0.18; for male: L = 34.58 cm, K= 0.18. The whole sample: L = 34.88 cm, K = 0.17 were calculated In Ras Albasit and in addition in Burj Islam L = 32.46 cm, K = 0.18; Male : L = 33.05 cm , K= 0.18; whole sample: L = 33.57 cm, K = 0.17.

Key-Words / Index Term :
Trachurus trachurus, Age, Growth, Length – weight, Syrian marine waters

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