Age, growth and maturity of the thin-lipped grey mullet, liza ramada in Bardawil lagoon, North Sinai, Egypt | ||||
Journal of Egyptian Academic Society for Environmental Development. D, Environmental Studies | ||||
Article 3, Volume 17, Issue 1, 2016, Page 25-36 PDF (722.43 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/jades.2016.63354 | ||||
View on SCiNiTO | ||||
Authors | ||||
Gaber Dessouky1; Azza El-Ganainy* 2; Mohamed Salem3; Atya El-Aiatt2; Amany A. Mahmoud Amany A. Mahmoud3 | ||||
1Faculty of Environmental Agricultural Sciences, EL-Arish, Suez Canal Univ | ||||
2National Institute of Oceanography and Fisheries, Suez, Egypt | ||||
3Faculty of Environmental Agricultural Sciences, EL-Arish, Suez Canal Univ., Egypt | ||||
Abstract | ||||
Age and growth of 599 thin-lipped grey mullet, Liza ramada from the Bardawil lagoon were estimated by ring counts on scalesduring April to December, 2013. Lengths (Lt) ranged between 11.6 to 45.8 cm and the corresponding weight (Wt)was 28 to 668 g. All fishes aged from 0 to 6 years, with age 1st, 2nd, 3th year being the most dominant age groups. The length-weight relationship indicated negative allometric growth (b=2.764). Back– calculated lengths were16.9, 23.1, 28.3, 32, 35.5 and 38.3 cm to ages 1st, 2nd, 3th, 4th, 5th and 6th, respectively. Von-Bertalanffy growth parameters (VBGP) were L∞=50.95cm, K=0.1977yr-1, t0= -1.04yr-1. The growth performance index (φ) was 2.71.The sex ratio of L. ramada in the present study was ≈ 1:2 male to female, respectively. The reproductive activity starts in September, while the highest values of GSI were at November and December. The length at first sexual maturity (Lm50) was estimated at 28.6 cm (≈ 3.1 years) and 29.6 cm (≈ 3.4 years) for males and females, respectively. | ||||
Keywords | ||||
Thin-lipped grey mullet; Liza ramada; Age; Growth; maturity; Bardawil Lagoon | ||||
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