SOMEI3l0LOGICAL CHARACTERS OF LETHRINUS NEBULOSUS ,'(FORSK;AL)'U4 THE ARAIDAN GULf·

SOMEI3l0LOGICAL CHARACTERS OF LETHRINUS NEBULOSUS
,'(FORSK;AL)’U4 THE ARAIDAN GULf· ,;’ ” ,
A. AL-SAYES, H. AL-SEDFY ,AND A. AL-:MULLA
Institute of Oceanography and Fisheries. Alexandria. Egypt.
ABSTRACT
The present 1nvest1gat1on is concerned with age.
growth and surv1val rates of Lethrinus’ nebulosus
1n the ,Arabian Gulf. Results of the present study
can be summarized as follow:
1. The relationship between radius of scale (S)
and total fish length (L), 15 shown by the following
equation:
L K 2.3829 (S) – 4.03
2. Growth rate in total length (Lt at age t) is
given by the following von Bertalanffy’~ equation:
Lt- 61.C2 [l_e-0. 138 (t + 0.905)]
3. The relationship between total body weight (W)
and total length (L) 1s shown by the following
equation:
W• 22.5940 x 10-3. L2.99B5
‘4. Survival rate was found to be 0.5520 i.e. about
‘55% of Lethrinus nebulosus’ could survive per year
after two years of age.