TY - JOUR
T1 - Growth, mortality and exploitation of buccaneer anchovy (Encrasicholina punctifer Fowler, 1938) from the north Persian Gulf and Oman Sea
TT -
JF - IFRO
JO - IFRO
VL - 17
IS - 2
UR - http://jifro.ir/article-1-3352-en.html
Y1 - 2018
SP - 313
EP - 326
KW - Encrasicholina punctifer
KW - Growth
KW - Mortality
KW - Persian Gulf
KW - Oman Sea
N2 - 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 length-frequency data were collected monthly by pair-boat 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 to 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 L25=6.05 cm, L50=6.48 cm and L75=6.93 cm. Four cohorts were distinguished annually with mean lengths of 4.56, 5.77, 7.21 and 8.50 cm. The length-weight 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 yield-per-recruit analysis, Emax, was estimated as 0.91. The results indicated that the buccaneer anchovy stock was not overexploited. Since E<Emax, it confirmed the good potential of anchovy stock in the area.
M3
ER -