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International Journal of Aquatic Biology، جلد ۹، شماره ۲، صفحات ۱۰۵-۱۱۴
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عنوان انگلیسی Life history parameters of Yellowfin hind, Cephalopholis hemistiktos (Rüppell, 1830) in the coast of United Arab Emirates
چکیده انگلیسی مقاله The life history parameters, including age, growth, mortality and recruitment of Yellowfin hind, Cephalopholis hemistiktos were studied in monthly collected samples from January to December 2018. Otolith was used for age determination. Mean size by the end of each year of life was estimated and showed that, the highest annual increment was identified at the end of the first year of life then gradually decreased with increase of fish age. The estimated von Bertalanffy growth parameters were L ∞ =43.51 cm, K =0.26 per year, t 0 =-0.74 year. Asymptotic weight W ∞ was estimated as 1375.23 g. The length-weight relationship was W =0.0126 L 3.0746 with R 2 =0.94 for both sexes. The instantaneous rates of total mortality and natural mortality were estimated as 0.77 and 0.49 per year, respectively. The gonado-somatic index showed increasing from April to August with a peak in June for both sexes. Size at first capture (L c ) was estimated as 24.30 cm, which was smaller than the mean size at first sexual maturity 25.31 cm. The value of fishing mortality (F=0.28y -1 ) was slightly higher than the optimum (F opt =0.25y -1 ) and smaller than the limit (F limit =0.33y -1 ) biological reference point, indicating that species was exploited within sustainable limit. Estimated parameters and the relative yield-per-recruit analysis showed that this species is not over-exploited.
کلیدواژه‌های انگلیسی مقاله Age, Growth, Mortality, Recruitment, Exploitation rate.
نویسندگان مقاله | Elsayed Farrag
National Institute of Oceanography and Fisheries, NIOF, Egypt.


| Walid Aly
Marine Environment Research Department, Ministry of Climate Change and Environment, United Arab Emirates.


| Ahmed El-Zaabi


نشانی اینترنتی http://ij-aquaticbiology.com/index.php/ijab/article/view/1089
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کد مقاله (doi) 10.22034/ijab.v9i2.1089
زبان مقاله منتشر شده en
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