Growth, mortality and exploitation of buccaneer anchovy (Encrasicholina punctifer Fowler, 1938) from the north Persian Gulf and Oman Sea




چکیده: (4046 مشاهده) 
The population parameters of Encrasicholina punctifer (buccaneer anchovy) from commercial fisheries in the Persian Gulf and Oman Sea coastal waters were studied from October 2014 to September 2015. A total of 13951 lengthfrequency data were collected monthly by pairboat purse seine and beach seine methods. The asymptotic length (L∞) and Von Bertalanffy growth function (K) were 11.5 cm and K=1.4 per year, respectively. The value of t_{o} was calculated as 0.14 year. Longevity was estimated as 2 years. The total length ranged from 2.9 to 10.1 cm, with an average of 6.5 cm. The probability of capture was calculated in total length as L_{25}=6.05 cm, L_{50}=6.48 cm and L_{75}=6.93 cm. Four cohorts were distinguished annually with mean lengths of 4.56, 5.77, 7.21 and 8.50 cm. The lengthweight relationship was determined as W= 0.0051 L^{ 3.1114}. Total, natural and fishing mortality parameters were estimated as 6.15, 2.84 and 3.32 yr^{1} respectively. The current rate of exploitation (E) was 0.54, and the values of exploitation ratio was found reasonable for current fishing effort. From the yieldperrecruit analysis, E_{max}, was estimated as 0.91. The results indicated that the buccaneer anchovy stock was not overexploited. Since Emax, it confirmed the good potential of anchovy stock in the area.




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نوع مطالعه: پژوهشي 
دریافت: 1396/12/26  پذیرش: 1396/12/26  انتشار: 1396/12/26





