fa بررسی وضعیت ذخیره ماهی هوور Thunnus tonggol Bleeker, 1851)) براساس رویکرد داده های محدود در آب های جنوب کشور (خلیج فارس و دریای عمان) شیلات و آبزیان Fisheries and Aquaculture پژوهشي Research/ Original/ Regular Article <div style="text-align: justify;"><span style="font-size:12pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">هدف از این مطالعه، توسعه چارچوبی است که به بررسی روند صید و </span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">برآورد محدود صید بهینه ذخیره &nbsp;ماهی هوور</span></span><font face="Times New Roman, serif">&nbsp; </font><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">&nbsp;( </span></span><i new="" roman="" style="font-family: " times=""><span dir="LTR" style="font-size:14.0pt">T. </span></i><a href="http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?spid=19289" new="" roman="" style="font-family: " times=""><i><span style="font-size:14.0pt"><span style="color:black"><span style="text-decoration:none"><span style="text-underline:none">tonggol</span></span></span></span></i></a><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)<b> </b>با جمع آوری اطلاعات </span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">صید این گونه</span></span><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:"> در آب های جنوب کشور می پردازد. &nbsp;دراین تحقیق، اطلاعات </span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">بیست و پنج </span></span><span lang="AR-SA" style="font-size: 14pt;"><span b="" nazanin="" style="font-family: ">سال صید این گونه تهیه و با کمک رویکرد&nbsp; اطلاعات محدود</span><font face="Times New Roman, serif"> </font><font face="B Nazanin">و نرم افزار</font></span> <span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">آر (</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">R</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، برآورد محدود صید بهینه </span></span><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">صورت پذیرفت. </span></span><font face="Times New Roman, serif">&nbsp;</font><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">میانگین صید </span></span><span dir="LTR" new="" roman="" style="font-family: " times="">(</span><span dir="LTR" new="" roman="" style="font-family: " times="">C</span><span dir="LTR" new="" roman="" style="font-family: " times="">t)</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:"> برای</span></span><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:"> این دوره </span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">مورد مطالعه </span></span><span lang="AR-SA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">44609 تن ( 95%&nbsp; فاصله اطمینان 53936-38882 تن) بوده و&nbsp; </span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">میانگین صید</span></span> <span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">(</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">R = 0.74, P < 0.05</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">) بصورت معنی داری طی دوره مورد مطالعه افزایش یافته است. میانگین(حداکثر- حداقل) ظرفیت حمل(</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">K</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، بیوماس فعلی یا موجود (</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">B</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، حداکثر محصول پایدار(</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">MSY</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، بیوماس حداکثر محصول پایدار(</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">B_MSY</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">) براساس مدل صید- محصول حداکثر پایدار(</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">CMSY</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، &nbsp;مدل صید بهینه شده (</span></span><span class="fontstyle01" style="font-family: TimesNewRomanPS-BoldMT, serif;"><span style="color:black"><span style="font-weight:bold"><span style="font-style:normal"><span dir="LTR" style="font-size:14.0pt">OCOM</span></span></span></span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">)، مدل درخت رگرسیونی تقویت شده</span></span> <span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">ژو (</span></span><span class="fontstyle01" style="font-family: TimesNewRomanPS-BoldMT, serif;"><span style="color:black"><span style="font-weight:bold"><span style="font-style:normal"><span dir="LTR" style="font-size:14.0pt">ZBRT</span></span></span></span></span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">) برآورد شد و میانگین نقاط مرجع بوسیله آزمون های آماری تفاوت معنی داری را نشان نداد (</span></span><span dir="LTR" new="" roman="" style="font-family: " times="">P>0.05</span><span lang="FA" new="" roman="" style="font-family: " times=""><span b="" nazanin="" style="font-family:">). این تحقیق نشان می دهد که میزان برداشت سالانه از ذخیره این گونه به حداکثر میزان خود رسیده و افزایشی صیدی برای این گونه پیشنهاد نمی گردد. </span></span></span></span></span></div> <div> <div style="text-align: justify;">&nbsp;</div> <hr align="left" size="1" width="33%" > <div style="text-align: justify;"><div id="ftn1"></div></div> </div> <div style="text-align: justify;"><span style="font-size:12pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><span style="font-size:14.0pt">The purpose of this study to develop a framework for investigating the catch trend and estimation of </span><span style="font-size:14.0pt">optimized catch limit</span><span style="font-size:14.0pt"> of the </span><i><span style="font-size:14.0pt">T. tonggol</span></i><span style="font-size:14.0pt"> stock by collecting catch data in the </span><span style="font-size:14.0pt">Iranian southern waters</span><span style="font-size:14.0pt">.&nbsp; In this research, the information of twenty-five years of catch of this species was prepared and with use of data limited approach and R software, estimation of optimal catch was made. The average catch (Ct) for this study period was 44609 tons (95% confidence interval 38882-53936 tons) and the average catch (R = 0.74, P < 0.05) increased significantly during the study period. Average (maximum-minimum) of carrying capacity (K), current biomass (B), maximum sustainable yield (MSY), biomass of maximum sustainable yield (B_MSY) based on </span><span style="font-size:14.0pt">Catch</span><span class="fontstyle01" style="font-family:TimesNewRomanPS-BoldMT,serif"><span style="color:black"><span style="font-weight:bold"><span style="font-style:normal"><span style="font-size:14.0pt">-MSY</span></span></span></span></span> <span style="font-size:14.0pt">(CMSY) model, Optimized</span><span class="fontstyle01" style="font-family:TimesNewRomanPS-BoldMT,serif"><span style="color:black"><span style="font-weight:bold"><span style="font-style:normal"><span style="font-size:14.0pt"> catch-only model</span></span></span></span></span><span style="font-size:14.0pt"> (OCOM) model and Zhou-Boosted regression tree models(Zhou-BRT) model was estimated and the mean reference points not show significant difference by statistical tests (P>0.05). This research shows that the annual harvest of </span><span style="font-size:14.0pt">Longtail tuna</span><span style="font-size:14.0pt"> species has reached its maximum amount and no increase in fishing is suggested for this species.</span></span></span></span><br> &nbsp;</div> ماهی هوور, مدل صید- محصول حداکثر پایدار(CMSY), مدل صید بهینه شده (OCOM), مدل درخت رگرسیونی تقویت شده ژو (ZBRT). Longtail tuna, Catch-MSY (CMSY), Optimized catch-only model (OCOM), Zhou-Boosted regression tree models(Zhou-BRT). 104 114 http://joc.inio.ac.ir/browse.php?a_code=A-10-1774-1&slc_lang=fa&sid=1 Seyed Ahmadreza Hashemi سید احمد رضا هاشمی seyedahmad91@gmail.com 100319475328460014875 100319475328460014875 Yes -Offshore Fisheries Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Chabahar, Iran. مرکز تحقیقات شیلاتی آبهای دور، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، چابهار، ایران .کد پستی 9971779417. Mastoorh Doustdar مسطوره دوستدار mastooreh.doustdar@gmail.com 100319475328460014876 100319475328460014876 No Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran. موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران .