دانلود مقاله A study of the field trial effects of oral recombinant bovine somatotropin (Eltosil®) on growth performance of rainbow trout (Oncorhynchus mykiss)
سال انتشار: ۱۳۸۷
محل انتشار: اولین کنگره بین المللی مدیریت بهداشتی و بیماریهای آبزیان
تعداد صفحات: ۱
M Haghighi – Coldwater Fishes Research Center
M Sharif Rohani – Iranian Fisheries Research Institute, Tehran
I Sharifpour – Iranian Fisheries Research Institute, Tehran
A Sepahdari – Iranian Fisheries Research Institute, Tehran
Method & Materials: In this research, 600 rainbow trout (Oncorhynchus mykiss) fry (mean weight of each fish 46±۱ grams) were randomly allotted in two groups including: 1) the control group and 2) Eltosil® treated group, each in three replicates. The fish received 200g recombinant bovine somatotropin 1% (Eltosil®) per 100kg BW. Eltosil® added the morning feed amounts which calculated on both total fish weight in each replicates of Eltosil® group and water temperature. After, the prepared morning feed was completely mixed with Eltosil® without water addition. Finally, the Eltosil®-mixed was gently mixed with water spray until the sticky feeling disappeared.
Results & Conclusion: The obtained results in this research demonstrated that there were no significant differences between growth factors in the control and Eltosil® treated groups on day 0-28 or 0-56 rearing periods (p> 0.05). However, there were significant differences between means of growth factors in WBW (p< 0.05), WG (p< 0.05), ADG (p< 0.05), TL (p< 0.001), and ADL (p< 0.05) of the control and Eltosil® treated groups on days 0-84. In the same period, there was greater 11.2% CGR in Eltosil® treated group than the control group. There were no significant differences between SGR, FCR, FC and the percentage of survival ratio of the control and Eltosil® treated groups in anyone rearing periods (p> 0.05). The positive effects of recombinant bovine somatotropin 1% (Eltosil®) on some growth factors, including whole body weight, weight gain, average daily weight, comparative growth rate, total body length and average daily length indicated that Eltosil® can produce a significant increase in the growth rate of rainbow trout weighing 46±۱ grams on days 0- 84.