نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته مرکز آموزش علوم و صنایع شیلاتی کشاورزی میرزاکوچک خان، گیلان، ایران
2 دکتری تخصصی (PhD.) موسسه تحقیقات بین المللی تاسماهیان دریای خزر، ایران
3 مربی پژوهشی موسسه تحقیقات بین المللی تاسماهیان دریای خزر، ایران
4 مربی آموزشی مرکز آموزش علوم و صنایع شیلاتی کشاورزی میرزاکوچکخان گیلان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was carried out on the growth and survival rates of Acipenser ruthenus and from larvae to fingerling stages. A total of 4000 larvae from each species were provided and stocked in 2 fiberglass tanks (2000 larvae in each tank with volume 3.2 m3). Food Conversion Ratio (FCR) for both species was 3.07 ± 0.3 in this period, which showed no significant difference statistically significantly (P>0.05). Based on these results, the mean weight of Acipenser ruthenus larvae was 21.8 ± 0.82 mg at the start phase of activated feeding and reached to 3 ± 0.35 g in fingerlings at the end after 76 days. The mean weight of Siberian sturgeon larvae was 23.7 ± 2.06 mg at the beginning of the study and reached to 2.8 ± 0.19 g at the end. Specific growth rate (SGR) in Acipenser ruthenus and Acipenser baerii was 2.77 ± 0.02% and 2.72 ± 0.02 percent, respectively that showed no significant difference. Survival rate in Acipenser ruthenus and Acipenser baerii were 45.5 ± 0.016 and 32.5 ± 0.15 that showed significant difference (P>0.05). Therefore, survival rate indices in Acipenser ruthenus were better than Acipenser baerii stocked in fiberglass tanks.
کلیدواژهها [English]