نوع مقاله : مقاله پژوهشی
نویسندگان
1 استاد گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه سرا، گیلان، ایران
2 گروه علوم دریایی، پژوهشکده حوضه آبی دریای خزر، دانشگاه گیلان، رشت، گیلان، ایران
3 مرکز بازسازی و حفاظت از ذخایر ژنتیکی ماهیان دریایی شادروان دکتر یوسفپور، سیاهکل، گیلان، ایران
4 مرکز بازسازی و حفاظت از ذخایر ژنتیکی ماهیان دریایی شادروان دکتر یوسفپور، سیاهکل، گیلان
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
One of the most important stages of domestication in each species is to maintain the animal in a rearing condition up to reaching to maturity and reproduction. Therefore, this study was performed with the aim of reproducing the pikeperch (Sander lucioperca) grown in a captivity condition. For this purpose, two groups of fish including control group (without hormone injection) and hormone induction group (HCG injection at 200 IU/kg) were considered and each group consisted of two replicates and 5 fish in each tank. The results showed that the fish spawned after 74 to 90 hours, but the difference between the two groups in this regard was not significant. The latency time was determined in case of degree-hour in non-injected breeders to 1396.9 ± 157.2 and in injected breeders to 1261.5 ± 34.2 degree-hours (P = 0.356). The response rate of fish in non-injected breeders was 87.5 ± 17.7% and in injected breeders was 75 ± 0.0% (P = 0.423). The quality of nests did not show any significant difference between the two groups. Fertilization rate was 87.3 ± 3.5% in non-injected fish and 82.7 ± 5.4% in injected fish (P = 0.412). According to the obtained results, it can be concluded that due to the complete adaptation of farmed fish to the captive rearing condition, it can be possible to propagate pikeperch without hormonal induction while the desired temperature and suitable spawning ground are available.
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کلیدواژه‌ها [English]
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