Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt
Mehanna, S., El-Sherbeny, A., Khalil, M., Ahmed, M., Kafrawy, S. (2015). Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt. EKB Journal Management System, 19(1), 1-6. doi: 10.21608/ejabf.2015.2234
Sahar Mehanna; Asaar El-Sherbeny; Magdy Khalil; Mahmoud Ahmed; Sameh Kafrawy. "Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt". EKB Journal Management System, 19, 1, 2015, 1-6. doi: 10.21608/ejabf.2015.2234
Mehanna, S., El-Sherbeny, A., Khalil, M., Ahmed, M., Kafrawy, S. (2015). 'Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt', EKB Journal Management System, 19(1), pp. 1-6. doi: 10.21608/ejabf.2015.2234
Mehanna, S., El-Sherbeny, A., Khalil, M., Ahmed, M., Kafrawy, S. Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt. EKB Journal Management System, 2015; 19(1): 1-6. doi: 10.21608/ejabf.2015.2234

Growth, mortality and relative yield per recruit of Japanese scad Decapterus maruadsi (Temminck & Schlegel, 1842) in the Gulf of Suez, Red Sea, Egypt

Egyptian Journal of Aquatic Biology and Fisheries
Article 1, Volume 19, Issue 1, January 2015, Page 1-6  XML PDF (5.39 MB)
Document Type: Original Article
DOI: 10.21608/ejabf.2015.2234
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Authors
Sahar Mehanna1; Asaar El-Sherbeny1; Magdy Khalil2; Mahmoud Ahmed3; Sameh Kafrawy3
1National Institute of Oceanography and Fisheries, Fisheries Division, Fish Population Dynamics Dept., Suez, Egypt.
2Ain Shams University, Faculty of Science, Zoology Dept., Cairo, Egypt
3National Authority for Remote Sensing and Space Science, Agriculture Applications, Soil and Marine Science Division, Marine Science Dept., Cairo, 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
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