صید بهینه ذخیره ماهی یال اسبی سر بزرگ ( Trichiurus lepturus Linnaeus, 1758 ) در آب های دریای عمان( استان سیستان و بلوچستان)

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسنده

موسسه تحقیقات علوم شیلاتی کشور، مرکز تحقیقات شیلاتی آب های دور(چابهار)

چکیده

هدف از این مطالعه، توسعه چارچوبی است که به بررسی روند صید و برآورد محدود صید بهینه ذخیره ماهی یال اسبی سر بزرگ ( T. lepturus) با جمع آوری اطلاعات صید این گونه در آب های شمالی دریای عمان می پردازد. دراین تحقیق، اطلاعات بیست سال صید این گونه تهیه و با کمک نرم افزار آر (R)، برآورد محدوده صید بهینه صورت پذیرفت. میانگین(95% حدود اصمینان) مدل تولید مازاد وضعیت بیزی و با کمک شبیه سازی مونت کارلو برای نرخ رشد آنی(r)، حداکثر محصول پایدار(MSY)، بیوماس در حداکثر محصول پایدار(BMSY)، مرگ و میر صیادی در حداکثر محصول پایدار (FMSY) به ترتیب 92/0(12/1- 76/0) سالانه، 42/8 ( 5/12 – 68/5 ) هزار تن، 2/18 ( 8/25 – 8/12) هزار تن، 46/0 ( 56/0- 38/0 ) سالانه بدست آمد. این تحقیق نشان می دهد که میزان برداشت سالانه از ذخیره این گونه به بیش از حداکثر میزان خود رسیده و جهت کاهش میزان صید و تلاش صیادی بایستی تدابیری اندیشیده شود.

کلیدواژه‌ها

عنوان مقاله [English]

Optimized catch of the Largehead hairtail (Trichiurus lepturus) in the waters of the Oman Sea (Sistan and Baluchestan Province)

نویسنده [English]

  • seyed ahmad reza hashemi
Offshore fisheries research center(chabahar), Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization.
چکیده [English]

The purpose of this study to develop a framework for investigating the catch trend and estimation of optimized catch limit of the T. lepturus stock by collecting catch data in the northern waters of the Oman Sea. In this research, catch data was collected for 20 years and optimized catch limit was estimate with the help of limited data approach and R software. The average (95% confidence interval) of the Bayesian surplus production model and Monte Carlo simulation for the intrinsic growth rate (r), maximum sustainable yield (MSY), biomass of maximum sustainable yield (BMSY), and fishing mortality of maximum sustainable yield (Fmsy) were obtained 0.92 (1.12-0.76) annually, 8.42 (12.5 – 5.68) thousand tons, 18.2 (12.8 - 25.8) thousand tons, 0.46 (0.56-0.38) per year, respectively. Results in this study showed exploitation ratio the Largehead hairtail stock is over fishing and decrease exploitation ratio and fishing effort proposed.

کلیدواژه‌ها [English]

  • Largehead hairtail
  • Bayesian surplus production model
  • Monte Carlo simulation

مراجع

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مجله بهره برداری و پرورش آبزیان
دوره 8، شماره 4
اسفند 1398
صفحه 53-62

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