مجله علوم آبزی پروری

مجله علوم آبزی پروری

اثر هورمون گنادوتروپین کوریونیک انسانی بر القای تکثیر و عملکرد تولیدمثلی مولدین سوف سفید (Sander lucioperca)

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران.
2 مرکز بازسازی و حفاظت از ذخایر ژنتیکی ماهیان دریایی شادروان دکتر یوسف‌پور، سیاهکل، ایران.
چکیده
این مطالعه با هدف بررسی اثرگذاری هورمون گنادوتروپیک کوریونیک انسانی (hCG) بر عملکرد تولیدمثل ماهیان سوف سفید (Sander lucioperca) در شرایط کنترل شده انجام شد. مولدین پس از انتقال از دریاچه مخزنی پشت سد ارس به مرکز بازسازی و حفاظت از ذخایر ژنتیکی ماهیان دریایی شادروان دکتر یوسف­پور سیاهکل، به دو گروه 16 تایی تقسیم و گروه اول با دوز IU/kg 200 هورمون hCG و گروه دوم با دوز IU/kg 400 در پایه باله سینه ­ای تزریق و در مخازن بتونی 44 مترمکعبی رهاسازی شدند. به‌ازای هر گروه نیز 18 عدد مولد نر بدون تزریق وارد مخازن شد و برای هر جفت مولد یک عدد لانه ساخته شده با چمن مصنوعی در نظر گرفته شد. از صبح روز چهارم پس از تزریق، تخمریزی در هر دو گروه آغاز شد و 100% مولدین در هر دو گروه تا پایان روز ششم تخمریزی کردند. میزان درجه-ساعت تا زمان تخمریزی و درصد لقاح بین دو گروه ماهیان تزریق شده اختلاف معنی­ داری را نشان نداد، اما کیفیت لانه ­های به ­دست آمده از گروه مولدین تزریق شده با IU/kg 400 به­ طور غیرمعنی‌داری بهتر از گروه دیگر بود. نتایج این مطالعه نشان داد با توجه به عملکرد مناسب هورمون hCG در القای تولیدمثل ماهی سوف سفید و عدم اختلاف معنی­ دار در اکثر شاخص ­های اندازه­ گیری شده، در صورت آمادگی کامل مولدین از دوز IU/kg 200 هم می ­توان برای این هدف استفاده نمود.
کلیدواژه‌ها

عنوان مقاله English

The effect of human chorionic gonadotropin on inducing propagation and reproductive performance of pikeperch (Sander lucioperca) broodstock

نویسندگان English

Bahram Falahatkar 1
Mehdi Rahmati 2
1 Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran.
2 Dr. Yousefpour Marine Fishes Restocking and Genetic Conservation Center, Siahkal, Iran.
چکیده English

This study aimed to evaluate the effects of human chorionic gonadotropin (hCG) on reproductive performance of pikeperch (Sander lucioperca) under controlled conditions. Broodstock were transferred from the reservoir lake behind the Aras Dam to the Dr. Yousefpour Marine Fishes Restocking and Genetic Conservation Center. The fish were divided into two groups (n=16 per group): the first group received an hCG injection of 200 IU/kg, and the second group received 400 IU/kg administered at the pectoral fin base, followed by release into the concrete tanks (44 m³). For each group, 18 non-injected male broodstock were introduced, and each breeding pair was provided with an artificial willow bed. Spawning began on the fourth day in the morning post-injection, and 100% of broodstock in both groups completed spawning by the end of the sixth day. No significant differences were observed between the two groups in terms of degree-hours until the spawning as well as the fertilization rate. However, nest quality in the 400 IU/kg group was non-significantly higher than in the 200 IU/kg group. The results indicated that hCG is effective in inducing reproduction of pikeperch, and since most measured parameters showed no significant differences, a dose of 200 IU/kg can be sufficient if broodstock are fully mature.

کلیدواژه‌ها English

Hormonal induction
Spawning
Stock restoration
hCG
Pikeperch
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