بررسی وضعیت دوریختی جنسی در گاوماهی چشم‌نواری (1822 Glossogobius giuris (Hamilton, در حوضه مکران، سیستان و بلوچستان

نوع مقاله : ریخت شناسی

نویسندگان

1 دانشکده کشاورزی و منابع طبیعی دانشگاه لرستان، خرم‌آباد، لرستان، ایران

2 گروه شیلات، پردیس کشاورزی و منابع طبیعی کرج، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

3 گروه کشاورزی، دانشگاه پیام نور، کرج، ایران

چکیده

به‌منظور مطالعه دوریختی جنسی گاوماهی چشم‌نواری (Glossogobius giuris)، تعداد 60 قطعه ماهی (شامل 30 قطعه از هر جنس) با استفاده از دستگاه الکتروشوکر طی تابستان 1392 از رودخانه باهوکلات، پایین‌تر از سد پیشین در استان سیستان و بلوچستان صید و به آزمایشگاه ماهی‌شناسی دانشگاه تهران منتقل گردید. برای این منظور تعداد 22 صفت اندازشی و پنج صفت شمارشی موردبررسی قرار گرفت. نتایج آماره‌های توصیفی داده‌ها نشان داد تنوع ریختی بین نمونه‌ها (به‌ویژه تعداد شعاع غیرمنشعب باله پشتی اول، تعداد شعاع‌های منشعب باله پشتی دوم و تعداد شعاع‌های منشعب باله مخرجی) بیش از مقادیر گزارش شده در مطالعات پیشین است که این امر را می‌توان به‌عنوان تنوع ریختی به این گونه نسبت داد. نتایج تجزیه‌وتحلیل آماری براساس آنالیز تشخیصی (DFA) و آزمون جایگشت (Permutation test) برای صفات اندازه‌ای و تجزیه ‌و تحلیل تطابقی CA) Correspondence Analysis ) برای صفات شمارشی نشان داد که بین دو جنس نر و ماده هم ­پوشانی بالایی وجود داشته و براساس صفات استفاده شده در این مطالعه نمی‌توان جنس‌های نر و ماده را از هم تشخیص داد.

کلیدواژه‌ها

عنوان مقاله [English]

Sexual dimorphism analysis of rikoo, Glossogobius giuris (Hamilton, 1822) from Mokran basin, Sistan and Baluchestan Province

نویسندگان [English]

  • Manoochehr Nasri 1
  • Soheil Eagderi 2
  • Sahar Gharehasanloo 3
1 Faculty of Agriculture and Natural Resources, Lorestan University, Khorramabad, Lorestan, Iran
2 Department of Fisheries, Agricultural and Natural Resources Campus of Karaj, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3 Department of Agriculture, Payame Noor University, Karaj, Iran
چکیده [English]

The sexual dimorphism of Rikoo goby (Glossogobius giuris) were investigated on 60 specimens (30 males and 30 females) sampled from Bahoo-Kalat River in Sistan and Baluchestan Province using electrofishing during summer 2014. The specimens were transported to the ichthyological laboratory of Tehran University. For morphological analysis, 22 morphometric and 5 meristic characters were investigated. The statistical analysis revealed morphological variation among specimens (specially: numbers of the first dorsal fin unbranched rays, numbers of the second dorsal fin branched rays and anal fin branched rays) were more than that of previous reports. The observed results can be a sign of the intraspecific polymorphism. The results of the discriminate function analyzed (DFA) and Permutation test (PT) for morphometric characters and Correspondence Analysis (CA) for meristic characters revealed that there are a wide morphological overlap among sexes and there is no reveal sexual dimorphism among our specimens at least based on our used characters.

کلیدواژه‌ها [English]

  • morphology
  • Morphological plasticity
  • Gobeidae
  • Iranian Fishes
  • Ichthyology

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فصلنامه محیط زیست جانوری
دوره 9، شماره 4
دی 1396
صفحه 161-166

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