Conference Paper

STOCK ASSESSMENT OF THE INDIAN MACKEREL RASTRELLIGER KANAGURTA (CUVIER, 1816) IN THE YEMENI COAST OF RED SEA, AL-HODEIDAH REGION

In proceeding of: International conference on fisheries

ABSTRACT Based on the otolith's readings of 952 specimens collected monthly during the period from November 2007 to June 2008, age and growth, mortality and yield per recruit of Rastrelliger kanagurta from Al-Hodeidah fishing area were studied. Age composition and growth study showed no variation between the two sexes. The oldest males and females were four years old and the values of the von Bertalanffy growth parameters for sexes combined were K = 0.58 year -1 , L  = 32.5 cm and t 0 = -0.18 year. The total mortality coefficient Z was estimated as 1.91 year -1 and the geometric mean of natural mortality coefficient M was 0.75 year -1 . The yield per recruit analysis suggests that the present level of both fishing mortality (F= 1.16) and exploitation ratio (E= 0.61) are higher than the target reference point E 0.5 . To attain such level, the present level of exploitation should be reduced by about 37%. In conclusion, for such economically important species additional detailed studies is recommended. Also, the population dynamics and fishery characteristics of all fishes in the Yemeni coast of Red Sea should be studied for setting-up effective management strategy.

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May 20, 2014