A. Osman, M., A. A. El Ganainy, A., H. M. Khouriba, H., M. Aly, M. (2020). SOME REPRODUCTIVE ASPECTS OF THE COMMON SILVER BIDDY GERRES OYENA (FORSSKAL, 1775) FROM THE GULF OF SUEZ, RED SEA, EGYPT. test, 24(4), 409-419. doi: 10.21608/ejabf.2020.100416
Menna Allah A. Osman; Azza A. A. El Ganainy; Hafez H. M. Khouriba; Mervat M. Aly. "SOME REPRODUCTIVE ASPECTS OF THE COMMON SILVER BIDDY GERRES OYENA (FORSSKAL, 1775) FROM THE GULF OF SUEZ, RED SEA, EGYPT". test, 24, 4, 2020, 409-419. doi: 10.21608/ejabf.2020.100416
A. Osman, M., A. A. El Ganainy, A., H. M. Khouriba, H., M. Aly, M. (2020). 'SOME REPRODUCTIVE ASPECTS OF THE COMMON SILVER BIDDY GERRES OYENA (FORSSKAL, 1775) FROM THE GULF OF SUEZ, RED SEA, EGYPT', test, 24(4), pp. 409-419. doi: 10.21608/ejabf.2020.100416
A. Osman, M., A. A. El Ganainy, A., H. M. Khouriba, H., M. Aly, M. SOME REPRODUCTIVE ASPECTS OF THE COMMON SILVER BIDDY GERRES OYENA (FORSSKAL, 1775) FROM THE GULF OF SUEZ, RED SEA, EGYPT. test, 2020; 24(4): 409-419. doi: 10.21608/ejabf.2020.100416

SOME REPRODUCTIVE ASPECTS OF THE COMMON SILVER BIDDY GERRES OYENA (FORSSKAL, 1775) FROM THE GULF OF SUEZ, RED SEA, EGYPT

Egyptian Journal of Aquatic Biology and Fisheries
Article 24, Volume 24, Issue 4, July and August 2020, Pages 409-419    PDF (476.37 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2020.100416
Authors
Menna Allah A. Osman; Azza A. A. El Ganainy; Hafez H. M. Khouriba; Mervat M. Aly
Abstract
The common silver biddy Gerres oyena is one of the most commercial fish species in the Gulf of Suez. The reproductive characteristics of G. oyenawere investigated in the Gulf of Suez during the period from 2015 to 2016. The overall sex ratio of males to females was estimated at 1: 2.1. Males predominated the small length groups from 10.5 to 13.5 cm, while females dominated the larger lengths >13 cm.  The monthly average values of gonad weight percentages and monthly different maturity stages showed that the species spawns during late spring with intensive spawning in May. The length at first sexual maturity was estimated at 13.5 cm for males and 14.1 cm for females which indicates that all individuals over two years of age were sexually mature. The results of this study can be used as a key figure for the conservation and maintenance of this commercially valuable stock in the Gulf of Suez.
Keywords
Sex ratio; common silver biddy Spawning season; Length at maturity; Gerres oyena; Gulf of Suez
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