AGE, GROWTH AND STOCK ASSESSMENT OF NABBASH (ABU BARATIM) Barbus barbulus HECKEL IN EUPHRATES RIVER NEAR AL-MUSSAIB POWER STATION

M. Abbas, L.; J. Al-Rudainy, A.; A.M.Mohammed,

	AGE, GROWTH AND STOCK ASSESSMENT OF NABBASH (ABU BARATIM) Barbus barbulus HECKEL IN EUPHRATES RIVER NEAR AL-MUSSAIB POWER STATION
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 1, 2009, Pages 0-0
Authors
L. M. Abbas; A. J. Al-Rudainy;
Abstract
A total of 331 specimens of Nabbash ( Abu baratim), Barbus barbulus Heckel were collected from the period of September 2002 to December 2003 from Euphrates river near Al-Mussaib power station. Fish stock assessment were estimated using FAO-ICLARM Stock Assessment Tools (FiSAT). According to Gulland and Holt the values were L∞=60.0cm and K= 0.28. The length of Nabbas at first capture (Lc) was 20cm and the length at first maturation (Lm) was 31.5cm. The mean values of total, natural and fishing mortality rate were 1.08, 0.58 and 0.50 respectively. The annual recruitment patterns for one year Nabbash has been shown two unequal peaks. The first was the major, continues for 6 months and the highest peak recorded during April reached 15.47%.The results of relative yield per recruit showed that the optimum calculated value (Emax) was 0.55,while the ideal exploitation value (E0.5) was 0.31. .The present study concludes that Nabbash in Euphrates river near Al-Massaib power station reached optimum length and age during short live period, the exploitation rate was lowest than optimum, without subjected to over fishing.

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