Fishery management based on relative yield-per-recruit model for the Largehead Hairtail (Trichiurus lepturus) stocks in the Persian Gulf and Oman Sea
Average rating
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Star rating
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Date
2018
Metadata
Show full item recordAbstract
Among the several fish species commercially exploited at the Persian Gulf and Oman Sea waters, the Largehead hairtail, Trichiurus lepturus, stands as one of the most influential groups that have been recently exploited for export to outside markets. In the current study, we applied the Beverton and Holt's relative yield per recruit model to provide management guidance and determine the biological reference points (i.e. E0.5 and Emax) for T. lepturus stock in the coastal waters of Iran. The von Bertalanffy growth equation (VBGF) was fitted to length–frequency data (n =1309) to obtain a VBGF with the following parameters: L∞=111.3 cm total length; K=0.41 and t0= -0.28 years. The estimated value of total mortality (Z) based on length converted catch curve method was 1.11 year-1 . Natural mortality (M) based on growth parameters was 0.67 year-1 while fishing mortality (F) was recorded as 0.44 year-1 . Maximum exploitation rate (Emax), corresponding to the maximum relative yield per recruit was Emax = 0.62. The stock was not overexploited, since E < Emax. The present results have to be considered with caution to fisheries management purposes as fishing effort is still in increasing phase. The long-term monitoring is required to better understand the T. lepturus population dynamic and its fishery framework in the study region.Journal
Iranian Scientific Fisheries JournalVolume
26Issue/Article Nr
6Page Range
pp. 93-102Resource/Dataset Location
http://isfj.areo.ir/Collections