بررسی وضعیت بهره برداری ماهی کوتر معمولی ( Sphyraena jello, Cuvier 1829) در آب های شمالی دریای عمان (استان سیستان و بلوچستان)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

2 مرکز تحقیقات شیلاتی آب های دور، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، چابهار، ایران

10.22034/AEJ.2021.297861.2597

چکیده

در بررسی حاضر، وضعیت بهره برداری ماهی کوتر معمولی Sphyraena jello با نمونه برداری از پنج منطقه تخلیه ماهی در شمال دریای عمان (ایران) شامل بریس، رمین، پزم، کنارک و جاسک از فروردین 1398 لغایت اسفند 1399 ارزیابی شد. روی 301 عددگونه ماهی کوتر معمولی، تجزیه و تحلیل بیومتریک انجام شد. شاخص های رشد و مرگ و میر شامل طول بی نهایت (سانتی متر)
L∞ = 155، ضریب رشد K = 0.55 (yr-1)، شاخص عملکرد رشد Ф = 4.14، مرگ و میر طبیعی M = 0.74 (yr-1)، مرگ و میر صیادی F = 1.46 (yr-1)؛ مرگ و میر کل  Z = 2.20±0.29 و ضریب بهره برداری E = 0.67 محاسبه شد. هم چنین تولید نسبی به ازای بازسازی ، زیست توده نسبی به ازای بازسازی به ترتیب Y'/Rp = 0.05 ،B'/Rp = 0.18بود. مطالعه حاضر نشان داد که شرایط و وضعیت ذخیره این گونه در حد کم تر از متوسط می باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation the exploitation status of Sphyraena jello (Cuvier 1829) in Northern waters Oman Sea (Sistan & Baluchistan Province)

نویسندگان [English]

  • Mastooreh Doustdar 1
  • Seyed Ahmad Reza Hashemi 2
1 Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran
2 Offshore Fisheries Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Chabahar, Iran Department of Biology, Faculty of Science, University of Tehran, Tehran, Iran
چکیده [English]

In the present study, population characteristics of Sphyraena jello were evaluated by sampling fish at five fish landing sites in the northern Oman sea (Iran) including Beris, Ramin, Pozm, Konarak and Jask from April 2020 to February 2021. The biometric analysis was performed on more than 301 fish. Growth and mortality indices were calculated including infinite length (L∞ = 155 cm), growth coefficient (K = 0.55 (yr-1)), growth performance index (Ф=4.14), natural mortality (M= 0.74 (yr-1)), fishing mortality (F = 1.46 (yr-1)), total mortality (Z = 2.20±0.29 (yr-1)) and exploitation coefficient (E = 0.67 (yr-1)). Relative production per recruitment, relative biomass per recruitment and exploitation rate of S. jello were Y'/Rp = 0.05, B'/Rp = 0.18. The present study showed that the stock conditions of this species is under of moderate.

کلیدواژه‌ها [English]

  • Explotation status
  • Sphyraena jello
  • Northern waters of Sistan and Baluchistan Province
  • Oman sea

مراجع

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فصلنامه محیط زیست جانوری
دوره 14، شماره 2
تیر 1401
صفحه 205-212

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