نتایج جستجو برای: broodstock selection
تعداد نتایج: 318277 فیلتر نتایج به سال:
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Abstract One of the factors that limits replacement fish meal (FM) and oil (FO) by plant ingredients in diets for marine fish, is their lack long chain-polyunsaturated fatty acids (LC-PUFA). LC-PUFA are essential these species, which sufficient acyl desaturase 2 (Fads2) activity to synthesize them. Nutritional programing or use broodstock with a higher Fads2 could improve ability low FM FO diet...
در این تحقیق به مطالعه وجود انتخاب نامساعد(کژ گزینی) در بازار بیمه درمان تکمیلی ایران پرداخته شده است. داده های مورد نیاز توسط پرسشنامه و به روش نمونه گیری خوشه ای جمع آوری شده است. پرسشنامه ها در میان افراد شاغل ساکن شهر تهران توریع شد. در این تحقیق با استفاده از تخمین دو مدل لجستیک و به دست آوردن ضریب همبستگی میان تقاضای بیمه درمان تکمیلی و رخداد خسارت به بررسی موضوع مورد نظر پرداخته شده است....
This study investigated the integrated effects of two photoperiods (16:08 and 08:16 h) along with three light intensities (3000, 15000 and 50000 lux) on some reproductive parameters and broodstock survival rates of Artemia parthenogenetica in six treatments in a completely randomized factorial design in culture system until death. Two-way ANOVA analysis revealed significant differences in total...
Different hormones are used to induce final sexual maturation in fish breeders and one of these hormones is different analogue of gonadotropin releasing hormone (GnRH) with different trade names. The aim of this study was to evaluate the biological activity of recombinant GnRH produced in the laboratory of Sari Agricultural Sciences and Natural Resources University on the induction and synchron...
Thyroid hormones [triiodothyronine (T3) and thyroxine (T4)] are also known to play an important function in other biological processes such as growth, sexual development and metabolism in different fish species. Therefore, the objective of this study was to examine the effects of T4 injection on growth performance and hematological indices in sterlet sturgeon (Acipenser ruthenus) broodstock. Th...
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