Study of effect several levels of multi-enzyme on performance parameters and survival rate in rainbow trout (Oncorhyncus mykiss

Subject Areas : Veterinary Clinical Pathology

S.J Mortazavi Tabrizi ¹ (Department of Hygiene and Aquatic Disease, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
مسعود Nejati ² (Graduate of Veterinary Medicine, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
SH Notash ³ (Department of Hygiene and Aquatic Disease, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran)
حمید Mirzaii ⁴ (Department of Hygiene and Aquatic Disease, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran)

Received: 2010-11-20 Accepted : 2011-06-08 Published : 2011-05-22

Keywords: Performance, Rainbow trout, Multi-enzyme, Survival rate,

Abstract :

This study was designed to investigate the influence of supplementing multi-enzyme in feed on growth and survival rate of rainbow trout fish. The multi-enzyme were incorporated into a commercial pellet ration to constitute three experimental diets containing 500, 1000, 1500 gram kemin phytase multi-enzyme per one ton feed intake, while a fourth diet without the multi-enzyme supplement served as the control diet. The diets were offered to rainbow trout (150 g average weight) in quadruplicate pools (each treatment) for 40 days. Fish were sampled at 10, 20, 30 and 40 days after commencement of the feeding trial to determine feed conversion ratio (FCR), weight and length rate and survival rate. Results of our study indicated that effect of different supplementing multi-enzyme levels on feed conversion ratio (FCR), weight and length rate and survival rate, there was not any meaning relation in dose rates (p>0.05). According to affect of type and concentrates of enzyme on animal response, we can recommend that type or concentrates of consummated kemin- phytase multi-enzyme is not suitable for rainbow trout.

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