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بررسی رژیم غذایی ماهی مرکب ببری (Sepia pharaonis) صید شده توسط گرگور در منطقه صیادی کنارک، استان سیستان و بلوچستان | ||
| فصلنامه علمی زیست شناسی جانوری تجربی | ||
| دوره 12، شماره 2 - شماره پیاپی 46، آذر 1402، صفحه 27-37 اصل مقاله (1.41 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.30473/eab.2024.67860.1908 | ||
| نویسندگان | ||
| حبیب اله صادقی1؛ آرش شکوری* 1؛ محمد جواد محمدی2 | ||
| 1گروه زیست شناسی دریا، دانشگاه دریانوردی و علوم دریای چابهار، چابهار، ایران | ||
| 2سازمان شیلات ایران، چابهار، ایران | ||
| چکیده | ||
| هدف از این مطالعه بررسی رژیم غذایی ماهیان مرکب ببری (Sepia pharaonis) صید شده توسط گرگور در فصول نمونهبرداری در صیدگاه کنارک در استان سیستان و بلوچستان بود. نمونه‌ها برای انجام مطالعات بیولوژیکی در بازه زمانی مهرماه تا دی ماه 1400 جمعآوری شدند. بر اساس دادههای بدست آمده، بیشترین تعداد در دی ماه (113 عدد)، و بیشترین دامنههای طولی (2/18 – 2/41 سانتیمتر) و وزنی (24/3886-17/426 گرم) در مهر ماه ثبت شدند. بر اساس نتایج رگرسیون غیر خطی بین طول و وزن، مقادیر پارامترهای a، b و R2 به‌ترتیب 17038/0، 6962/2 و 9842/0 بودند. همچنین بیشترین میزان شاخص فولتون در آذر ماه (93/0) و کمترین شاخص در مهر ماه (64/0) بدست آمد. بیشترین میزان شاخص شاخص گاسترو-سوماتیک (GaSI) در آذر ماه (02/1) و کمترین میزان نیز در آبان ماه (7/0) مشاهده گردید. همچنین بیشترین شاخص پری معده (SFI) در دی ماه (535/0) و کمترین میزان نیز در آبان ماه (31/0) مشاهده گردید. تغییرات شاخص نسبت معده خالی (ESR) نیز نشان داد میزان این شاخص در طی ماههای مهر 68 درصد، آبان 57 درصد، آذر 34 درصد و دی ماه 41 درصد بوده است. بر اساس نتایج اتساع معده، بیشترین وضعیت معده خالی (53 درصد) و اتساع سه چهارم (13 درصد) در مهر ماه مشاهده شدند. همچنین بیشترین اتساع یک چهارم (18 درصد)، اتساع یک دوم (24 درصد) و معده پر (22 درصد) در دی ماه مشاهده گردیدند. نتایج این مطالعه نشان داد که بین وضعیت تغذیه ماهیان مرکب ببری صید شده توسط گرگور در منطقه کنارک در ماههای نمونهبرداری مختلف ارتباط معنیداری وجود دارد و ماهیان مرکب ببری صید شده دارای رژیم غذایی متنوعی(ماهی، سخت پوستان، نرم تنان و سایر موارد هضم شده) در ماههای مختلف نمونهبرداری میباشند. | ||
| کلیدواژه‌ها | ||
| بندر کنارک؛ رژیم غذایی؛ گرگور؛ ماهی مرکب ببری؛ محتویات معده | ||
| عنوان مقاله [English] | ||
| Diet of Pharaoh Cuttlefish (Sepia pharaonis) caught by Fishing trap in Konarak fishing area, Sistan and Baluchestan province | ||
| نویسندگان [English] | ||
| Habibollah Sadeghi1؛ Arash Shakouri1؛ Mohammad Mohammadi2 | ||
| 1Department of Marine Biology, Chabahar Maritime University, Chabahar, Iran | ||
| 2Iranian Fisheries Organization, Chabahar, Iran | ||
| چکیده [English] | ||
| This study aimed to investigate the diet of Pharaoh cuttlefish (Sepia pharaonis) caught by pot during the sampling seasons in the Konarak fishing ground located in the Sistan and Baluchestan province. Tiger squid samples were collected for biological studies in the period from October to January 2021. Based on the obtained data, the highest number was recorded in January (113 specimens), and the highest ranges of length (18.2-2.41 cm) and weight (426.17-17.3886 grams) were recorded in October. Based on the results of non-linear regression between length and weight, the values of a, b, and R2 parameters were 0.17038, 2.6962, and 0.9842, respectively. The highest Fulton index was obtained in December (0.93) and the lowest index was obtained in October (0.64). The highest value of the GaSI index was observed in December (1.02) and the lowest value was observed in November (0.7). Also, the highest SFI index was observed in January (0.535) and the lowest in November (0.31). The changes in the ESR index also showed that this index was 68% in October, 57% in November, 34% in December, and 41% in January. Based on the results of gastric dilatation, the highest state of the empty stomach (53%) and three-quarter dilation (13%) were observed in October. Also, most one-quarter dilation (18%), one-half dilation (24%), and full stomach (22%) were observed in January. The results showed that there is a significant relationship between the nutritional status of Pharaoh Cuttlefish caught by fishing trap in the Konarak in different sampling (P<0.05). Also, they have a varied diet (Fish, crustaceans, mollusks, and other digested materials) during different sampling months. | ||
| کلیدواژه‌ها [English] | ||
| Pharaoh cuttlefish, Konarak pot, stomach contents | ||
| مراجع | ||
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