Title of article :
Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt
Author/Authors :
Mehanna, Sahar F. National Institute of Oceanography and Fisheries - Fish Population Dynamics Department, Fisheries Division, Egypt , Khalil, Magdy T. Ain Shams University - Faculty of Science - Zoology Department, Egypt , Ahmed, Mahmoud H. M. National Authority for Remote Sensing and Space Science, Agriculture Applications - Marine Science Department, Soil and Marine Science Division, Egypt , El Kafrawy, Sameh B. National Authority for Remote Sensing and Space Science, Agriculture Applications - Marine Science Department, Soil and Marine Science Division, Egypt , El-Sherbeny, Asaar S. H. National Institute of Oceanography and Fisheries - Fish Population Dynamics Department, Fisheries Division, Egypt
Abstract :
The stock of Japanese scad Decapterus maruadsi was assessed based on 1864 specimen (combined sexes), collected from the Gulf of Suez during the fishing season 2011/2012. The growth parameters (L∞ K) have been estimated from length frequency distribution data, and the obtained values were L∞ = 27.31 cm TL and K = 0.53/y. The instantaneous rates of total (Z), natural (M) and fishing (F) mortalities were 1.80, 0.61 and 1.19/y respectively with exploitation ratio (E) of 0.66/y which reflects an over exploitation situation. The estimated length at first capture (Lc) was 12.2 cm, while the length at first sexual maturity (Lm) was 12.3 cm. The relative yield per recruit analysis shows that the stock of D. maruadsi is overexploited and needs to develop a management strategy to conserve and optimize its yield.
Keywords :
Growth , yield per recruit , Decapterus maruadsi , Gulf of Suez
Journal title :
Egyptian Journal of Aquatic Biology and Fisheries
Journal title :
Egyptian Journal of Aquatic Biology and Fisheries
