Stock assessment and management of the Egyptian Sole Solea aegyptiaca Chabanaud, 1927 (Osteichthyes: Soleidae), in the Southeastern Mediterranean, Egypt

• Published in: Turkish Journal of Zoology (Turkey) Vol. 31; no. 4; pp. 379 - 388
• Main Author: Mehanna, S.F., National Institute of Oceanography and Fisheries, Suez (Egypt)
• Format: Journal Article
• Language: English
• Published: TÜBİTAK 2007
• Subjects: age; age determination; AGE STRUCTURE; Akdeniz; Aquatic Biology and Ecology; av kompozisyonu (balık); balık; body length; büyüme; catch composition; denge taşı; EGIPTO; EGYPT; EGYPTE; ESTRUCTURA POR EDADES; EVALUACION DE POBLACIONES ICTICAS; EVALUATION DES STOCKS; fishes; growth; GROWTH RATE; http://www.fao.org/aos/agrovoc#c_12985; http://www.fao.org/aos/agrovoc#c_16130; http://www.fao.org/aos/agrovoc#c_24251; http://www.fao.org/aos/agrovoc#c_2503; http://www.fao.org/aos/agrovoc#c_28630; http://www.fao.org/aos/agrovoc#c_45667; http://www.fao.org/aos/agrovoc#c_45683; http://www.fao.org/aos/agrovoc#c_4699; INDICE DE CRECIMIENTO; MAR MEDITERRANEO; MEDITERRANEAN SEA; MER MEDITERRANEE; Mısır (ülke); mortality; OSTEICHTHYES; otolith; REPARTITION DES AGES; Solea; SOLEA AEGYPTIACA; SOLEIDAE; STOCK ASSESSMENT; Sucul Biyoloji ve Ekoloji; TAUX DE CROISSANCE; vücut uzunluğu; yaş; yaş saptanması; ölüm oranı
• ISSN: 1303-6114; 1300-0179

Aspects of the population dynamics of the Egyptian sole, Solea aegyptiaca, which is a commercially important endemic and demersal flatfish species in the Egyptian Mediterranean waters, were described based on materials collected monthly between February 2004 and May 2005 from the fishing harbor at Port Said city. Age and growth studies based on sagittal otoliths revealed that this species is relatively fast growing with a maximum age of 4 years. Marginal increment analysis suggested that bands on sagittae are deposited once a year during the winter. Mean back-calculated total lengths ranged from 17.75 cm at age I to 28.22 cm at age IV. Growth was best described by the von Bertalanffy growth model as Lt = 30.9 (l -e-0.53(t + 0.33)). Estimates of total, natural, and fishing mortality were 2.56, 0.75, and 1.81 year-1, respectively. The high value of exploitation rate (E = 0.71) indicated that this species is suffering from high fishing pressure. The yield per recruit analysis suggested that the S. aegyptiaca stock in the Eastern Mediterranean, Port Said region needs development of a management strategy to conserve and optimize its yields.