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Iranian Journal of Fisheries Sciences، جلد ۱۹، شماره ۶، صفحات ۲۷۹۰-۲۸۰۳
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عنوان انگلیسی Research Article: Length-based fishery status of yellowfin tuna (Thunnus albacares Bonnaterre, 1788) in the northern waters of the Oman Sea
چکیده انگلیسی مقاله In the present study, population characteristics of Thunnus albacares were evaluated by sampling at five fish landing sites in the northern Oman Sea including Beris, Ramin, Pozm, Konarak and Jask from March 2017 to March 2018. The biometric analysis was performed on more than twenty-six thousand fish. Population dynamic parameters were calculated including infinite length (L∞=171 cm), growth coefficient (K=0.54 (yr-1)), growth performance index (Ф'=4.19), natural mortality (M= 0.71(yr-1)), fishing mortality (F=1.57 (yr-1)), total mortality (Z=2.28±0.19 (yr-1)), exploitation coefficient (E=0.68 (yr-1)) and initial condition parameter (-0.18 yr-1). Relative production per recruitment, relative biomass per recruitment and exploitation rate of this species were Y'/ Rp = 0.04, B'/ Rp=0.23(yr-1) and U=0.62 (yr-1), respectively. The Pobj value is < 1, Popt and Pmega>0, and F/Fmsy>1. The results indicated that regarding length frequencies of this species in the northern part of the Oman Sea, yellowfin tuna stock has good conditions, but overfishing of this species is happening, now. Therefore, specific measures should be taken to reduce catch and fishing effort.
کلیدواژه‌های انگلیسی مقاله Thunnus albacares, Length frequency, Population dynamic parameters, Oman Sea
نویسندگان مقاله | S.A.R. Hashemi
Off-shore Fisheries Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Chabahar, Iran.


| M. Doustdar
Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran.


| A. Gholampour
Bushehr Fisheries Department, Bushehr, Iran.


| M. Khanehzaei
Sistan and Baluchestan Fisheries Department, Chabahar, Iran.
نشانی اینترنتی http://jifro.ir/browse.php?a_code=A-10-2470-2&slc_lang=en&sid=1
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Stock assessment
نوع مقاله منتشر شده پژوهشی
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