AGE, GROWTH AND MORTALITY OF THE RABBIT FISH Slganus rivulatus (FORSK., 1775) FROM THE RED SEA

AGE, GROWTH AND MORTALITY OF THE RABBIT FISH
Slganus rivulatus (FORSK., 1775) FROM THE RED SEA
F. I. EL – GAMMAL
Nattonal Instttute of OceanograP’1 lid ,t,’-‘i.., Red Sea end Suez Canal
Branch, Suez, (gypt.
ABSTRACT
Age, growth and mortal t ty of St.-nus rhulatas
from the Red Sea were studted. Otoltths f~ 251
‘ish were used for age detamtnatton. Age .c~osttton
varted among sexe.. Ttle olde.’ femal •• were 5+ yr.
and the oldest 1lI41es were 4+ yr. The mean length’
at the end of each year 0′ ltfe for ..les and ’emale.
were back-calculatecl. The Von Bertalanf’y equatton.
descrtbtng theoretical growth tft length and tn wetght
were computed. Surviva1 rete ($), annua1 IllOrta1tty
rate (A) and instantaneous mortal tty coefftcient
(Z) of males and females were estttaated bydtffertl'”
methods.