تفاوت گونه ای صید شبانه و روزانه کشتی ترالر در آب های شمالی دریای عمان (استان سیستان و بلوچستان)

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 نویسنده مسئول، مرکز تحقیقات شیلاتی آب‌های دور، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، چابهار، ایران

2 مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

پژوهش حاضر در تیر ماه 1399 از صید شناور تجاری افسون 1، در فاصله بالاتر از 10 مایل در عرض جغرافیایی 50 24 الی60 24 و طول جغرافیایی 30 61 الی 05 61 صورت پذیرفت. زمان مطالعه 13 مرتبه صید ترال در ساعات مختلف، 8 مرتبه درساعات روز و 5 مرتبه درساعات شب صورت پذیرفت. میزان صید کل در طول دوره مطالعه 12306 کیلوگرم بوده و 8720 کیلوگرم در روز(حدود 71 درصد) و 3586 کیلوگرم در شب ( حدود 29 درصد) صید گردید. میزان میانگین صید به ازای تلاش صیادی (صید به ازای هریک ساعت تورکشی) گونه های هدف (یال اسبی، طلال، ماهی مرکب، گوازیم دم رشته ای و حصون) در روز 201 کیلوگرم (67 درصد) و در شب 63 کیلوگرم (33 درصد) بوده و میزان میانگین صید به ازای تلاش صیادی (صید به ازای هریک ساعت تورکشی) گونه های دور ریز در روز 71 کیلوگرم (28 درصد) و در شب 100 کیلوگرم (59 درصد) و معنی داربود. میزان میانگین صید به ازای تلاش صیادی (صید به ازای هریک ساعت تورکشی) گونه های صید ضمنی در روز 18 کیلوگرم و در شب 9 کیلوگرم با یکدیگر تفاوت معنی داری نداشت. گونه یال اسبی سر بزرگ (64 %) بیشترین میزان صید گونه های صید هدف،گونه هامور (53 %) بیشترین میزان صید گونه های صید ضمنی را تشکیل می دادند. به نظر می رسد گونه های صافی و کتو روز فعال و گونه های لوله ماهی ، مارماهی و منقار ماهی شب فعال باشند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Difference between night and day trawler fishing in the northern waters of Oman Sea (Sistan and Baluchestan Province)

نویسندگان [English]

  • Seyed Ahmad Reza Hashemi 1
  • Mastooreh Doustdar 2
1 Corresponding Author, Offshore Fisheries Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Chabahar, Iran
2 Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran.
چکیده [English]

In this study, sampling of commercial vessels of Afsoon 1 was carried out in July 2020, at a distance of more than 10 miles in longitude24 50 to 24 60 and latitude 61 03 to 61 05. At the time of the study, trawl fishing was done 13 times at different times, 8 times during the day and 5 times at night. The total catch during the study period was 12306 kg and 8720 kg were caught during the day (about 71%) and 3586 kg at night (about 29%). The average catch per fishing effort (catch per hour) of the target species was 201 kg (67%) during the day and 63 kg (33%) at night, and the average catch per fishing effort (catch per hour) discard species were 71 kg (28%) during the day and 100 kg (59%) at night (P <0.05). The mean catch per fishing effort (catch per hour) of bycatch fishing species at 18 kg during the day and 9 kg at night were not significantly different from each other (P> 0.05). The Trichiurus lepturus species (64%) had the highest catch of target species, Epinephelus coioides species (53%) had the highest catch of bycatch fishing species and Ray fish (88%) had the highest catch of discard species. The Siganidae and Megalaspis cordyla species, appear to be active during the day and pipe fish, Anguiliformes and Belonidae species of night active.

کلیدواژه‌ها [English]

  • Trawl catch
  • catch per fishing effort
  • Target species
  • Oman Sea

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مجله بهره برداری و پرورش آبزیان
دوره 12، شماره 4
دی 1402
صفحه 51-61

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