Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1392
7
1
gregorian
2013
10
1
12
4
online
1
fulltext
en
Population dynamic parameters of Thunnus tonggol (Bleeker, 1851) in the Persian Gulf and Oman Sea
Stock assessment
Stock assessment
پژوهشي
Orginal research papers
Length frequency data of the longtail tuna, Thunnus tonggol collected from October 2006 to September 2007 were analyzed for evaluation of the stock parameters. T. tonggol is mainly caught by gillnet method. Yearly tuna and tuna-like catches in Iran are of the order of 174,234 mt, close to 46% of which are longtail tuna. The VBG parameters for longtail tuna were: L∞ =133.72cm K=0.35 year−1.The length –weight relationship was estimated as: W=0.00002 L 2.83.The instantaneous rates of total mortality (Z) was estimated by using the Powell-Wetherall plot as 1.82 year−1. The instantaneous rate of natural mortality was obtained by Pauly equation (M=0.44 year−1) and the instantaneous rate of fishing mortality (F) estimated from Z-M=1.38year−1.
Growth and mortality parameters, Thunnus tonggol, Persian Gulf, Oman Sea
855
863
http://jifro.ir/browse.php?a_code=A-10-1272-55&slc_lang=en&sid=1
F
Kaymaram
farhadkaymaram@gmail.com
10031947532846008960
10031947532846008960
Yes
M
Darvishi
10031947532846008961
10031947532846008961
No
S
Behzadi
10031947532846008962
10031947532846008962
No
S
Ghasemi
10031947532846008963
10031947532846008963
No