| تعداد نشریات | 286 |
| تعداد نشریات سازمان | 84 |
| تعداد شماره‌ها | 3,021 |
| تعداد مقالات | 33,767 |
| تعداد مشاهده مقاله | 45,087,418 |
| تعداد دریافت فایل اصل مقاله | 50,684,482 |
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: 434 تعداد دریافت فایل اصل مقاله: 344 |
||