بررسی دوریختی جنسی با استفاده از صفات اندازشی و پارامترهای رشد در خرچنگ ویولن زن Austruca sindensis (Alcock, 1900)، در ساحل شرق بندرعباس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیلات، دانشکده علوم و فنون دریایی و جوی، دانشگاه هرمزگان، بندرعباس، ایران

2 گروه کشاورزی، دانشگاه پیام نور، تهران، ایران

10.22034/AEJ.2021.289477.2552

چکیده

هدف از این مطالعه بررسی دوریختی جنسی در صفات اندازشی و پارامترهای رشد خرچنگ Austruca sindensis به مدت 12 ماه از دی ماه 1396 تا آذر 1397 در ساحل شرق بندرعباس(پشت فرودگاه) بود. نمونه‌ها بعد از جمع‌آوری به منظور مطالعات بعدی به آزمایشگاه زیست‌شناسی دانشگاه هرمزگان منتقل شدند. روی هم رفته 857 عدد نمونه (475 عدد خرچنگ نر و 382 عدد خرچنگ ماده) جمع ­آوری شد. براساس نتایج، میانگین پهنای کاراپاس جنس نر (2/52±9/48 میلی ­متر) بیش تر از میانگین پهنای کاراپاس جنس ماده (1/84±8/47 میلی­ متر) به دست آمد (0/05>P). از بین پارامترهای مورد بررسی نسبت پهنای پنجمین و ششمین بند آبدمن به طور معنی‌داری در جنس ماده بیش تر از جنس نر به دست آمد (0/05>P). نوع رشد در خرچنگ نر و ماده به صورت آلومتریک منفی مشاهده شد. هم چنین میزان شیب رگرسیون جنس نر (2/92) به طور معنی‌داری بیش تر از جنس ماده (2/72) محاسبه شد (0/05>P). در این تحقیق عرض کاراپاس مجانب (CW∞)، سن فرضی در طول صفر، طول عمر برای جنس نر 23 میلی‌متر، 0/13- و 2/6 سال و برای جنس ماده 19/8 میلی‌متر، 0/1- و 1/9 سال برآورد گردید. از طرفی سرعت رشد و میزان مرگ و میر در جنس ماده بیش تر از جنس نر برآورد شد. میزان فاکتور وضعیت جنس نر (0/006±0/042) به طور معنی‌داری بیش تر از میزان فاکتور وضعیت جنس ماده (0/006±0/034) به دست آمد (0/05>P). هم چنین تغییرات در میزان فاکتور وضعیت با تغییرات درجه حرارت هم سو بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of sexual dimorphim in morphometric characters and some growth parameters of the fidder crab Austruca sindensis (Alcock, 1900) eastern coast of Bandar Abbas, Persian Gulf

نویسندگان [English]

  • Mohammadreza Mandegari 1
  • Ehsan Kamrani 1
  • Mohsen Safaie 1
  • Mojtaba Naderi 2
  • Moslem Daliri 1
1 Department of Fisheries, Faculty of Marine Sciences and Technology, University of Hormozgan, Bandar Abbas, Iran
2 Department of Agriculture, Payame Noor University, Tehran, Iran
چکیده [English]

The aim of this study was investigation sexual dimorphim in morphometric characters and some growth parameters of Austruca sindensis on eastern coast of Bandar Abbas (behind the airport) during January 2017 to December 2018. Samples after collecting were moved to biology laboratory of Hormozgan university for more study. 857 Individuals (457 males and 382 females) have collected. Based on results, carapace width means of male crabs (9.48 ± 2.52 mm) was obtained significantly more than carapace width mean of female crabs (8.47 ± 1.84 mm) (P<0.05). Among the studied parameters, proportion of fifth and sixth abdomen width was significantly more in females (P<0.05). The negative allometric growth was observed for both sex. Also, the exponential value (b) estimated was obtained 2.92 for male crabs and 2.72 for female crabs (P<0.05). In this study, Asymptotic carapace width (CW∞), the theoretical age at length zero (t0), maximum life span estimated 23 mm, -0.13, 2.6 year for male and 19.8 mm, -0.1, 1.9 year for female. Also, growth rate (k) and mortality of female were high in comparison to male crabs. The condition factor value of males (0.042±0.006) was obtained significantly more than of females (0.034±0.006) (P<0.05). In addition, variations in the condition factor rate were correlated with temperature.

کلیدواژه‌ها [English]

  • Sexual dimorphism
  • Growth parameters
  • Condition factor
  • Austruca sindensis

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فصلنامه محیط زیست جانوری
دوره 14، شماره 3
آبان 1401
صفحه 323-328

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