اخبار و اعلانات

 آمار

تعداد نشریات283
تعداد نشریات سازمان81
تعداد شماره‌ها2,722
تعداد مقالات31,007
تعداد مشاهده مقاله27,042,140
تعداد دریافت فایل اصل مقاله16,154,064
Eskandari, Gholamreza, Koochaknejad, Emad, Hashemi, Ahmad. (1398). Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf. سامانه مدیریت نشریات علمی, 18(2), 296-306. doi: 10.22092/ijfs.2018.117809
Gholamreza Eskandari; Emad Koochaknejad; Ahmad Hashemi. "Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf". سامانه مدیریت نشریات علمی, 18, 2, 1398, 296-306. doi: 10.22092/ijfs.2018.117809
Eskandari, Gholamreza, Koochaknejad, Emad, Hashemi, Ahmad. (1398). 'Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf', سامانه مدیریت نشریات علمی, 18(2), pp. 296-306. doi: 10.22092/ijfs.2018.117809
Eskandari, Gholamreza, Koochaknejad, Emad, Hashemi, Ahmad. Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf. سامانه مدیریت نشریات علمی, 1398; 18(2): 296-306. doi: 10.22092/ijfs.2018.117809

Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf

Iranian Journal of Fisheries Sciences
مقاله 93، دوره 18، شماره 2، تیر 2019، صفحه 296-306    اصل مقاله (519.57 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22092/ijfs.2018.117809
نویسندگان
Gholamreza Eskandari* ؛ Emad Koochaknejad؛ Ahmad Hashemi
Iranian Fisheries Research Organization
چکیده
Stock assessment of Otolithes ruber was carried out using Virtual Population Analysis (VPA) method in the coastal waters of Northwest Persian Gulf. Catch and length frequency data during 2002-2012 were converted to age frequency. The maximum of stock number and biomass were observed in age group 1 and 2 respectively. The minimum of stock number and biomass were observed age group 6. The maximum and minimum of catch number were in age group 2 and 6 respectively. The maximum and minimum of weight were in age group 3 and 1 respectively. The maximum and minimum of instantaneous fishing mortality were in age group 4 and 1 respectively. The maximum of fishing mortality was estimated in 2010-2011 and minimum was in 2002-2003 and 2008-2009. During 2011-2012 the stock number and biomass were estimated 29558 (*103) specimen, 7302 ton and the catch number and weight were calculated 7562 (*103), 2364 ton and fishing mortality was obtained 0.47 per year. The calculated parameters showed over-exploitation in age-groups 3 and 4. To preserve stocks and to guarantee sustainable exploitation, the prevention of increasing fishing efforts and the control of fishing activities are crucial.
کلیدواژه‌ها
Virtual Population Analysis؛ Stock Number and Biomass؛ Catch Number and Weight؛ Otolithes ruber
آمار
تعداد مشاهده مقاله: 343
تعداد دریافت فایل اصل مقاله: 253


counter
سامانه مدیریت نشریات علمی. قدرت گرفته از سیناوب