fa بررسی میزان CPUE ثبت شده و CPUE استاندارد شده پنج گونه ماهی کفزی در سواحل جنوب ایران (خوزستان، بوشهر، هرمزگان و سیستان و بلوچستان) در یک دوره 5 ساله (1395-1399) شیلات و آبزیان Fisheries and Aquaculture پژوهشي Research/ Original/ Regular Article <div style="text-align: justify;"><span style="font-size:11pt"><span><span><span style="line-height:107%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="background:#2e74b5"><span b="" nazanin="" style="font-family:"><span style="color:white">پیشینه و اهداف:</span></span></span></b> <span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">مطالعه&shy;ی حاضر با هدف بررسی میزان </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">(CPUE)</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> ثبت&shy;شده و </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">(CPUE)</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> استاندارد&shy;شده پنج گونه </span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">ماهی شوریده </span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">(</span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">Otolithes ruber</span></span></i><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)، ماهی سنگسر معمولی(</span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">Pomadasys kaakan</span></span></i><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)، ماهی هامور معمولی(</span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">Epinephelus coioides</span></span></i><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)، ماهی حلوا&shy;سیاه(</span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">Parastromateus niger</span></span></i><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) و ماهی شانک(</span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">Acanthopagrus latus</span></span></i><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) در سواحل جنوب ایران انجام گرفت.</span></span></span> <span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">CPUE </span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">به عنوان شاخص فراوانی نسبی در ارزیابی ذخایر استفاده می&shy;شود،</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">این شاخص می&shy;تواند تحت تاثیر پارامترهایی نظیر ابزار صید، ساختار صید، ضریب آویختگی، اندازه چشمه، شرایط اکولوژیک منطقه مورد مطالعه و فراوانی گونه هدف در صید فعال قرار بگیرد</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">بنابراین برای کاهش این اثرات بر قابلیت صید، </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">CPUE</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> استاندارد شده مورد استفاده قرار می</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">&shy;</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">گیرد.</span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span></span></span></span></div> <div dir="ltr" style="text-align: justify;"><span style="font-size:11pt"><span><span><span style="line-height:107%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:">&nbsp;<b><span lang="AR-SA" style="background:#2e74b5"><span b="" nazanin="" style="font-family:"><span style="color:white">روش‌ها‌:</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">داده&shy; های مورد نیاز به وسیله &shy;ی مطالعات میدانی صورت گرفته توسط سازمان شیلات ایران در طی سال&shy; های</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">) </span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">1395-1399</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">(</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در سواحل جنوب ایران (خوزستان، بوشهر، هرمزگان و سیستان و بلوچستان) جمع آوری گردید.</span></span></span> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">روش صید مورد استفاده در این مطالعه صید با&nbsp; تور گوشگیر بوده است که این روش&nbsp; از جمله مهم ترین روش &shy;های صید در خلیج فارس و دریای عمان محسوب می&shy; شود.</span></span></span> <span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">برای استاندارد&shy;سازی و پیش بینی مقادیر</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%"> CPUE </span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">برحسب متغیرهای منطقه صید، سال و ماه صید از مدل خطی تعمیم‌یافته</span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">(</span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">GLMs</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) استفاده گردید.</span></span></span> <span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">برای تجزیه و تحلیل داده&shy;های </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">CPUE</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> در استان&shy;ها و سال&shy;های مختلف از </span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">آزمون تجزیه واریانس و برای مقایسه میانگین&shy; ها از آمون دانکن استفاده </span></span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">گردید.</span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span></span></span></span></div> <div style="text-align: justify;"><span style="font-size:11pt"><span><span><span style="line-height:107%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="background:#2e74b5"><span b="" nazanin="" style="font-family:"><span style="color:white">یافته‌ها:</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">بر اساس نتایج بیشترین </span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">اختلاف بین مقادیر </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">CPUE</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> ثبت&shy; شده<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> و </span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="line-height:107%">CPUE</span></span><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> استاندارد&shy;شده <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><b> </b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در ماهی شوریده در استان سیستان و بلوچستان به ترتیب با مقادیر 7/12 و 1/21<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در سال 1399 و کمترین این اختلاف در استان هرمزگان با مقادیر1/3 و 1/3 <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> در سال 1397، در ماهی سنگسر بیشترین&nbsp; این اختلاف در استان خوزستان با مقادیر 6/8 و 7/3 <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> در سال 1395 و کمترین اختلاف در استان هرمزگان با مقادیر0/3 و 8/2<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در سال 1396 و در استان خوزستان با مقادیر 3/2 و 5/2<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در سال 1399، در ماهی حلواسیاه بیشترین اختلاف با مقادیر 4/34 و 2/27<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> در استان سیستان و بلوچستان در سال 1395 و کمترین اختلاف در استان خوزستان با مقادیر1/2 و 5/2 <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> در سال 1397، در ماهی هامور بیشترین اختلاف در استان هرمزگان بیشترین اختلاف با مقادیر 0/4&nbsp; و 4/2 <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b><b> </b><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">&nbsp;د</span></span></span></b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">ر سال 1396 و کمترین اختلاف در استان هرمزگان با مقادیر2/2 و 3/2<b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">در سال 1398 و در ماهی شانک بیشترین اختلاف در استان خوزستان بیشترین اختلاف با مقادیر4/7 و 2/5 در سال 1399 و کمترین اختلاف در استان هرمزگان با مقادیر3/1 و 3/1 <b>(</b></span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">کیلوگرم/طاقه/روز</span></span></span><b><span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">)</span></span></span></b> <span lang="FA" style="font-size:10.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">&nbsp;در سال 1397 ثبت گردید.</span></span></span><span lang="AR-SA" style="font-size:10.0pt"><span style="line-height:107%"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span></span></span></span></div> <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:107%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="background:#2e74b5"><span b="" nazanin="" style="font-family:"><span style="color:white">نتیجه‌گیری:</span></span></span></b></span></span></span></span></span><br> <span dir="RTL" lang="FA" style="font-size:10.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:">نوسانات در میزان&nbsp; </span></span></span><span style="font-size:10.0pt"><span style="line-height:115%"><span calibri="" style="font-family:">CPUE</span></span></span><span dir="RTL" lang="FA" style="font-size:10.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"> می&shy; تواند تحت تاثیر عواملی مانند شکل ابزار ماهیگیری، تجربه ناخدا، پیشرفت&shy;های تکنولوژیک، شرایط محیطی، پراکنش ماهی و عوامل مؤثر بر آن، فشار صیادی وارد شده، کارآیی ناوگان&shy; های صیادی و نحوه&shy; ی بهره &shy;برداری از ذخایر باشد. به جهت اینکه </span></span></span><span dir="RTL" style="font-size:10.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"> یک نماینده فرضی برای شاخص فراوانی ذخایر ماهی می&shy; باشد و در ارزیابی ذخایر و بررسی وضعیت ذخایر شیلاتی اهمییت بسیار بالایی دارد، و همچنین با توجه به کاهش روند صید جهانی هم از دریا و هم از آب&shy;های داخلی بررسی این عوامل در مطالعات شیلاتی لازم و ضرروری ب نظر می &shy;رسد.&nbsp; </span></span></span>&nbsp;&nbsp;&nbsp;</div> <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:107%"><span calibri="" style="font-family:"><b><span style="font-size:9.0pt"><span style="background:#2e74b5"><span style="line-height:107%"><span style="color:white">Background and Objectives:</span></span></span></span></b> <span style="font-size:8.0pt"><span style="line-height:107%">This study aimed to assess the recorded CPUE (Catch Per Unit Effort) and standardized CPUE of five fish species: Croaker (<i>Otolithes ruber</i>), Grounter(<i>Pomadasys kaakan</i>), Grouper (<i>Epinephelus coioides</i>), Black Pomfret(<i>Parastromateus niger</i>) and Sea Bream(<i>Acanthopagrus latus</i>) along the southern coasts of Iran. CPUE is used as an index of relative abundance in stock assessments. However, this index can be influenced by factors such as fishing gear, fishing structure, hanging ratio, mesh size, ecological conditions of the study area, and the target species&rsquo; abundance in active fishing. To mitigate these effects on catchability, standardized CPUE is utilized.</span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:107%"><span calibri="" style="font-family:"><b><span style="font-size:9.0pt"><span style="background:#2e74b5"><span style="line-height:107%"><span style="color:white">Methods:</span></span></span></span></b> <span style="font-size:8.0pt"><span style="line-height:107%">Data was gathered from field studies conducted by the Iranian Fisheries Organization from 2016 to 2020 along the southern coasts of Iran (Khuzestan, Bushehr, Hormozgan, and Sistan and Baluchestan). The fishing method used was gillnetting, one of the most substantial fishing methods in the Persian Gulf and the Oman Sea. Generalized Linear Models (GLMs) were used to standardize and predict CPUE values based on variables such as fishing region, year, and month. For analyzing CPUE across different provinces and years, Analysis of Variance (ANOVA) and Duncan&rsquo;s multiple range test were employed for mean comparisons.</span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:107%"><span calibri="" style="font-family:"><b><span style="font-size:9.0pt"><span style="background:#2e74b5"><span style="line-height:107%"><span style="color:white">Findings:</span></span></span></span></b><span style="font-size:8.0pt"><span style="line-height:107%">The greatest discrepancy between recorded CPUE (kg/roll/day) and standardized CPUE (kg/roll/day) for Otolithes ruber was found in Sistan and Baluchestan province with values of 12.7 and 21.1 (kg/roll/day) in 2020, respectively, while the smallest discrepancy was in Hormozgan province with values of 3.1 and 3.1 (kg/roll/day) in 2018. For Pomadasys kaakan, the largest discrepancy was in Khuzestan province with values of 8.6 and 3.7 (kg/roll/day)in 2016, and the smallest was in Hormozgan with values of 0.3 and 2.8 (kg/roll/day) in 2017, and in Khuzestan with values of 2.3 and 2.5 (kg/roll/day) in 2020. For Parastromateus niger, the greatest discrepancy was in Sistan and Baluchestan with values of 34.4 and 27.2 (kg/roll/day) in 2016, and the smallest in Khuzestan with values of 2.1 and 2.5 (kg/roll/day) in 2018. For Epinephelus coioides, the greatest discrepancy in Hormozgan was with values of 4.0 and 2.4 (kg/roll/day) in 2017, and the smallest in Hormozgan with values of 2.2 and 2.3 (kg/roll/day) in 2019. For Acanthopagrus latus, the greatest discrepancy in Khuzestan with values of 7.4 and 5.2 in 2020, and the smallest in Hormozgan with values of 1.3 and 1.3 (kg/roll/day) in 2018.</span></span></span></span></span><br> <b><span style="font-size:9.0pt"><span style="background:#2e74b5"><span style="line-height:115%"><span calibri="" style="font-family:"><span style="color:white">Conclusion:</span></span></span></span></span></b> <span style="font-size:8.0pt"><span style="line-height:115%"><span calibri="" style="font-family:">Fluctuations in CPUE can be influenced by factors such as the design of fishing gear, captain&rsquo;s experience, technological advancements, environmental conditions, fish distribution and the factors affecting it, fishing pressure, efficiency of fishing fleets, and the manner of stock exploitation. Since CPUE serves as a hypothetical representative for the fish stock abundance index and holds significant importance in stock assessments and the examination of fishery stock statuses, and in light of the global decline in fishing trends both from the sea and inland waters, the investigation of these factors in fishery studies appears necessary and essential.</span></span></span></div> CPUE ثبت شده, CPUE استانداردشده, خلیج فارس, دریای عمان, گونه های تجاری registered CPUE, standardized CPUE, Persian Gulf, Sea of Oman, Commercial species 123 137 http://joc.inio.ac.ir/browse.php?a_code=A-10-1373-2&slc_lang=fa&sid=1 Youssef Paighambari یوسف پیغمبری sypaighambari@gau.ac.ir 100319475328460015211 100319475328460015211 Yes Gorgan University of Agricultural Sciences and Natural Resources دانشگاه علوم کشاورزی و منابع طبیعی گرگان Parviz Zare پرویز زارع parvizzare58@yahoo.com 100319475328460015212 100319475328460015212 No Gorgan University of Agricultural Sciences and Natural Resources دانشگاه علوم کشاورزی و منابع طبیعی گرگان Mahboobeh Mirzaei محبوبه میرزائی mirzeimahboobeh@gmail.com 100319475328460015213 100319475328460015213 No Gorgan University of Agricultural Sciences and Natural Resources دانشگاه علوم کشاورزی و منابع طبیعی گرگان Reza Abbaspour Naderi رضا عباسپور نادری r_naderimail@yahoo.com 100319475328460015214 100319475328460015214 No Iranian Fisheries Organization سازمان شیلات ایران