[صفحه اصلی ]   [Archive]  
:: صفحه اصلي :: درباره نشريه :: آخرين شماره :: تمام شماره‌ها :: جستجو :: ثبت نام :: ارسال مقاله :: تماس با ما ::
بخش‌های اصلی
صفحه اصلی::
اطلاعات نشریه::
آرشیو مجله و مقالات::
برای نویسندگان::
برای داوران::
ثبت نام و اشتراک::
تماس با ما::
تسهیلات پایگاه::
پست الکترونیک::
::
جستجو در پایگاه

جستجوی پیشرفته
..
دریافت اطلاعات پایگاه
نشانی پست الکترونیک خود را برای دریافت اطلاعات و اخبار پایگاه، در کادر زیر وارد کنید.
..
:: دوره 17، شماره 3 - ( 1397 ) ::
جلد 17 شماره 3 صفحات 457-443 برگشت به فهرست نسخه ها
Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River
چکیده:   (4749 مشاهده)
The relationship between the Lower Danube River level and Romanian annual catches of Pontic shad (Alosa immaculata, Bennett 1835) were analyzed. For analysis of long term data on the Danube River water level and Pontic shad catch, combinations of different methods were applied using statistical programs, SPSS 13.0 and MATLAB 6. Periodograms, containing cyclic patterns, were obtained using Fourier analysis. Significant oscillations were determined with Fisher-Whittle’s tests and residuals were calculated after subtracting these significant oscillations from the original signals. Autoregressive moving average (ARMA) models of residuals were finally applied. Results indicated that river water levels, and especially those in May, greatly explained the fluctuations of Pontic shad catch. Annual landings varied greatly and appeared to be cyclic. Varying river flow was considered to be one of the most important factors that cause fluctuations in the size of populations. Forecast indicates gradual increase of the catch in the next decade, followed by a decrease in other decades. Estimated as a vulnerable species of fish by the IUCN, development of the forecasting model of the future catch oscillations could be very helpful to regulate fishing efforts towards the sustainable use of stocks and species conservation.
متن کامل [PDF 478 kb]   (2279 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: Biology & physiology
دریافت: 1397/4/11 | پذیرش: 1397/4/11 | انتشار: 1397/4/11
ارسال نظر درباره این مقاله
نام کاربری یا پست الکترونیک شما:

CAPTCHA


XML   English Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Smederevac-Lalić M, Kalauzi A, Regner S, Navodaru I, Višnjić-Jeftić Ž, Gačić Z et al . Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River. IJFS 2018; 17 (3) :443-457
URL: http://jifro.ir/article-1-3486-fa.html

Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River. مجله علوم شیلاتی ایران. 1397; 17 (3) :443-457

URL: http://jifro.ir/article-1-3486-fa.html



بازنشر اطلاعات
Creative Commons License این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است.
دوره 17، شماره 3 - ( 1397 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.09 seconds with 35 queries by YEKTAWEB 4691