Some aspects of reproductive biology of Alepes djedaba ( Teleostei: Carangidae) in the Arabian Gulf

Some aspects of reproductive biology of Alepes djedaba ( Teleostei:
Carangidae) in the Arabian Gulf
Amany, M. Osman 1,* and Hayam Abdulla Al Abdulhadi 2

1- Oceanography Department, Faculty of Science, Alexandria University, Egypt
*current address: Biological Sciences Department, Rabigh college of Science and Art, King Abdulaziz University,
P.O. box 344, Rabigh 21911, Saudia Arabai
2- Faculty of Science, Dammam, University, Saudia Arabia
E- mail: [email protected]
Received 20th November 2011, Accepted 29th December 2011
Abstract

Reproductive biology and biological parameters of Alepes djedaba, family Carangidae from the Arabian Gulf,
Kingdom of Saudia Arabia show that the spawning season lasted from January to June, with a spawning peak in
May for males and June for females. The sex ratio (males to females) was 1: 1.36. The size at onset of sexual
maturity was 17.6 cm for males and 18.1 cm for females. Hepatosomatic index reached its maximum values in
December, February and May. The Fullness index of the stomach revealed that the rate of feeding was high in the
months from December to March, after which it decreased gradually. The equation of the length weight relationship
showed a slight negative allometry (b = 2.9). Monthly variations in condition factor showed that it increased from
October to January. These findings bring additional biological relevance to the species under study in the Arabian
Gulf
Keywords: Carangidae, Alepes djedaba, reproductive biology, length weight relationship, fullness index.