fa شاخص‌های جمعیتی و نسبت پتانسیل مولدین براساس طول (LBSPR) ماهی هوور مسقطی (Katsuwonus pelamis Linnaeus, 1758) درآبهای شمالی دریای عمان (سواحل استان سیستان و بلوچستان) تخصصي Special پژوهشي Research <span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span b="" lang="FA" style="font-family:" zar="">در این تحقیق خصوصیات جمعیتی و نسبت پتانسیل مولدین<b> </b>ماهی هوور مسقطی</span> <span b="" lang="FA" style="font-family:" zar="">(</span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:#222222">Katsuwonus</span></span></span></span></i><i> </i><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:#222222">pelamis</span></span></span></span></i><span b="" lang="FA" style="font-family:" zar="">) بررسی شد. برای این منظور اطلاعات از 4 منطقه تخلیه صید در سواحل استان سیستان و بلوچستان شامل بریس، پسابندر، پزم و کنارک جمع آوری شد. در مجموع بیش از سه هزار ماهی در ایستگاه&shy;های تحقیق، مورد زیست سنجی قرارگرفت</span><span dir="LTR" new="" roman="" style="font-family:" times="">.</span><span b="" lang="FA" style="font-family:" zar=""> شاخص</span><span dir="LTR" new="" roman="" style="font-family:" times="">&shy;</span><span b="" lang="FA" style="font-family:" zar="">های رشد به ترتیب طول بی نهایت</span> <span b="" lang="FA" style="font-family:" zar="">(سانتی متر) 92 =</span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">L_&infin;</span></span><span b="" lang="FA" style="font-family:" zar="">، ضریب رشد سالانه&nbsp; 68/0=</span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">K</span></span><span b="" lang="FA" style="font-family:" zar="">، مرگ و میر طبیعی سالانه 7/0= </span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">M</span></span><span b="" lang="FA" style="font-family:" zar="">، مرگ و میر صیادی سالانه 37/0=</span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">F</span></span><span b="" lang="FA" style="font-family:" zar="">، مرگ ومیر کل سالانه 07/1=</span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Z</span></span><span b="" lang="FA" style="font-family:" zar="">، ضریب بهره برداری سالانه 35 /0</span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">E</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">=</span><span b="" lang="FA" style="font-family:" zar="">، زمان طول صفر 17/0- </span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">t_o</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">=</span><span b="" lang="FA" style="font-family:" zar=""> و میزان شاخص عمکرد رشد (فایم پریم مونرو) 76/3 </span>&nbsp;<span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">&Phi;&#39;</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">=</span><span b="" style="font-family:" zar=""> بدست آمد. نسبت پتانسیل مولدین براساس طول<b> </b>در سال 1401 برای این گونه ( 45/0- 38/0) 42/</span><span lang="FA" style="font-size:10.0pt"><span b="" style="font-family:" zar="">0</span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">LBSPR</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">=</span><span b="" lang="FA" style="font-family:" zar=""> بود</span><span dir="LTR" new="" roman="" style="font-family:" times="">.</span><span b="" lang="FA" style="font-family:" zar=""> این تحقیق نشان داد که این گونه دارای آسیب پذیری متوسط و وضعیت ذخیره&nbsp; متوسط بوده و&nbsp; همچنین میزان برداشت سالانه از ذخیره این گونه در مرحله کمتر از صید بی رویه قرار گرفته&shy;است. </span></span></span></span></span></span><br> &nbsp; <span style="font-size:11pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="line-height:115%"><span style="font-family:Calibri,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp; <span new="" roman="" style="font-family:" times="">In this research, population characteristics and </span><span new="" roman="" style="font-family:" times="">length-based spawning potential ratio (LBSPR) </span><span new="" roman="" style="font-family:" times="">of </span><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">skipjack tuna</span></span></span><span new="" roman="" style="font-family:" times=""> (</span><i><span new="" roman="" style="font-family:" times="">Katsuwonus pelamis</span></i><span new="" roman="" style="font-family:" times="">) were investigated. For this purpose, information was collected from 4 fishing areas on the coasts of Sistan and Baluchistan province, including Bris, Pasabandar, Pozam and Kanarak. In total, more than three thousand fish were bio-measured in the research stations, and the growth indices were infinite length L&infin; = 92(cm), annual growth coefficient K = 0.68, annual natural mortality 0.7 = M, the annual fishing mortality F=0.37, the total annual mortality Z=1.07 and the annual exploitation coefficient E=0.35 and the time of zero length to=-0.17 and the amount of </span><span new="" roman="" style="font-family:" times="">growth performance index </span><span new="" roman="" style="font-family:" times="">&Phi;&#39;=3.76. The ratio of </span><span new="" roman="" style="font-family:" times="">length-based spawning potential ratio (LBSPR) </span><span new="" roman="" style="font-family:" times="">in 2022 for this species was LBSPR=0.42 (0.38-0.45). This research showed that this species has medium vulnerability and medium stock status, and also the annual harvesting rate of this species is lower than overfishing.</span></span></span></span></span></span><br> &nbsp; هوور مسقطی, استان سیستان و بلوچستان, خصوصیات جمعیتی, نسبت پتانسیل مولدین Skipjack tuna, Sistan and Baluchestan Province, Demographic characteristics, Spawning potential ratio. 103 117 http://aqudev.lahijan.iau.ir/browse.php?a_code=A-10-618-1&slc_lang=fa&sid=1 Seyed Ahmad Reza Hashemi سیداحمدرضا هاشمی Seyedahmad91@gmail.com 100319475328460010562 100319475328460010562 Yes Offshore Fisheries Research Center, Iranian Fisheries Science and Research Institute, Agricultural Research Education and Extension Organization, Chabahar, Iran. مرکز تحقیقات شیلاتی آبهای دور Mastooreh Doustdar مسطوره دوستدار mastooreh.doustdar@gmail.com 100319475328460010563 100319475328460010563 No Iranian Fisheries Science and Research Institute, Agricultural Research Education and Extension Organization, Tehran, Iran. موسسه تحقیقات علوم شیلاتی کشور Parastoo Mohebi derakhsh پرستو محبی درخش mdparastoo1356@yahoo.com 100319475328460010564 100319475328460010564 No Iranian Fisheries Science and Research Institute, Agricultural Research Education and Extension Organization, Tehran, Iran. موسسه تحقیقات علوم شیلاتی کشور