بررسی تاثیر عوامل محیطی بر میزان صید به ازای واحد تلاش (CPUE) ماهیان حلوا سیاه (Parastromateus niger Black Pomfret) صید شده در سه منطقه صیادی (پزم، بریس و رمین) استان سیستان و بلوچستان

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری گروه تولید و بهره برداری آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

2 گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

3 استادیار گروه تولید و بهره برداری آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

4 استادیار گروه محیط زیست، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

چکیده

این بررسی با هدف ارزیابی اثرات عوامل محیطی ( دما و کلروفیل) روی تغییرات ماهانه و سالانه صید در واحد تلاش ماهی حلوا‌سیاه از خانواده گیش ماهیان با استفاده از تور گوشگیر در آب‌های دریای عمان (بنادر صیادی پزم، رمین و بریس) استان سیستان و بلوچستان انجام شد. میزان صید ماهی حلوا‌سیاه در استان سیستان و بلوچستان به تفکیک مراکز تخلیه ( پزم، رمین و بریس ) و ماه‌های مختلف (فروردین تا اسفند) از سال 1397-1392 مورد تجزیه و تحلیل قرار گرفت. به منظور بررسی اطلاعات عوامل محیطی (دما وکلروفیل) طی سال‌های نامبرده از داده‌های سنجش از دور استفاده شد. میزان صید در سه منطقه صیادی در سال‌های 97-92 از 0 تا 1346 تن ثبت شده، که بیشترین مقدار مربوط به فروردین سال 1394 منطقه پزم بوده است.به‌علت عدم نرمال بودن داده‌ها، از آزمون کروسکال-والیس جهت تجزیه و تحلیل داده‌ها و از آزمون نمنی برای مقایسه میانگین ها استفاده شد. نتایج تجزیه و تحلیل داده‌ها نشان داد که تفاوت معنی داری بین میزان صید در واحد تلاش سه منطقه مورد مطالعه، سال‌ها و ماه‌های مختلف وجود دارد (P<0.05). طبق نتایج مقایسه میانگین، میزان صید در واحد تلاش در مناطق پزم و رمین تفاوت معنی‌داری نداشت اما با بندر بریس دارای تفاوت معنی دار بودند. مقدار صید در واحد تلاش در سال 93 با سال‌های 95 و 96 دارای تفاوت معنی‌دار بود در حالی‌که بین سال‌های دیگر تفاوت معنی داری مشاهد نشد. همچنین با به کارگیری روش تحلیل رگرسیون، عوامل محیطی بر میزان صید ماهی حلوا سیاه اثر معنی دار نداشتند.

کلیدواژه‌ها


عنوان مقاله [English]

the effect of environmental factors on the catch per unit efforts (CPUEs) of caught Parastromateus niger (Black Pomfret) in the three fishing grounds of Sistan & Bluchestan province

نویسندگان [English]

  • Parvaneh Babaie 1
  • Yousef paighambari 2
  • Parviz Zare 3
  • Reza Abbaspour Naderi 3
  • Hamid Reza Kamyab 4
1 Ph.D. Student, Dept. of Fisheries and Aquatic Ecology, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
2 Department of Fisheries, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Iran
3 Assistant Prof., Dept. of Fisheries and Aquatic Ecology, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
4 . Assistant Prof., Dept. of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
چکیده [English]

This study was aimed to evaluate the effects of environmental factors (temperature and chlorophyll) on monthly and annual changes in catch per unit effort (CPUE) of caught Parastromateus niger using gillnet in the Gulf of Oman (Pozm, Ramin and Brise) in Sistan and Baluchestan province.The data of caught fishes were analyzed separately for determined centers (Pozm, Ramin and Brise) different months, from 2013 to 2018. Remote sensing data were used to evaluate the information of environmental factors (temperature and chlorophyll) during the study years. The amount of fishing in three fishing areas was recorded from 0 to 1346 tons during 2013 to 2018.The highest amount was related to April 2015 in the Pozm region. The maximum and minimum amount of catch per unit of effort during 2013 to 2018 is related to the Pozm region, which in 2015 was calculated as 0.73 kg roll net per day and in 2018, 0.01 kg roll net per day. Due to the non-normality of the data, the Kruskal-Wallis test was used to analyze the data and the Nemeny test was used to compare the means. The analysis results showed a significant difference between the CPUEs of the three regions, during different months and years (P <0.05). According to the results of the mean comparison, the amount of catch per unit of effort was not significantly different in Pozm and Ramin areas but they had significantly different with Brise port. The amount of catch per unit of effort in 1993 was significantly different from 1995 and 1996, while no significant difference was observed between other years. Effect of environmental factors on the catch of black Pomfret was investigated using the regression analysis method and no relationship was observed between them.

کلیدواژه‌ها [English]

  • gillnet
  • Cach per Unit Effort
  • Psarastromateus niger Gulf of Oman
  • Sistan And Baluchistan
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