Categories
vol-33ESTIMATION OF TOTAL MORTALITY RATES AND VIRTUAL
POPULATION ANALYSIS OF EPINEPHELUS TAUVINA FROM
ARABIAN GULF QATAR
ABDEL FATTAH MOHAMED EL-SAYED, AMANY MOHAMED AHMED OSMAN,
MEDHAT ABDEL BARR
Oceanography Department, Faculty of Science, Alexandria University, Egypt.
[email protected]
Key words: Grouper, Mortality, Virtual Population Analysis, Arabian Gulf.
ABSTRACT
Mortality rates and virtual population analysis of Epinephelus tauvina from Arabian
Gulf off Qatar were computed using data on age, length and catch. Total mortality was
found to be 0.57 per year; the natural mortality 0.17 per year while the fishing mortality
was 0.4 per year. VPA showed a decrease of population number and increase in the fishing
mortality with age and length. There was an increase in the catch up to the length group (63
cm) after that it decreased with increase of the fish size. The biomass was also increased
with length up to length group (59cm) and then decreased with length.
