Citation link:
Authors:
Zhelyazkov, G.; Stoev, T.
Title:
DIETARY SAVORY EXTRACT (SATUREJA HORTENSIS) SUPPLEMENTATION OF RAINBOW TROUTS - INFLUENCE ON PRODUCTIVE TRAITS, BLOOD BIOCHEMISTRY AND FISH MEAT QUALITY
Date of Issue:
2024
Is Part of:
Trakia Journal of Sciences: Series Biomedical Sciences, Vol. 22, No 3, pp 193-201
Publisher:
Тракийски университет - Стара Загора
Identifiers:
1313-3551 [issn]
Type:
Article
Language:
eng
Subject:
survival rate; weight gain; feed conversion ratio; economic efficiency; chemical composition; fatty acid profile
Abstract:
PURPOSE: This study was designed to assess the effects of savory extract supplementation to fish feed on the mortality rate, growth parameters, economic performance,blood biochemistry, meat chemical composition and fatty acid contentof rainbow trouts farmed in a recirculation system.METHODS: Rainbowtrouts(n=160)wereassignedtotwogroups –control(C) andexperimental (S.h).All fish were farmed in a recirculation system and were fed extruded feed. The fish of groupS.hwere supplemented via feed with 1% powdered savory extract, by lubrication of granules with 5 ml/100 gsunflower oil. The feed of the control fish (group C) was treated only with sunflower oil.RESULTS AND CONCLUSIONS: Theadditionofsavoryextracttothefedofrainbowtroutshadabeneficialeffectonthe maingrowthindicators andthe economicperformanceoffarmed fish.Final live weight and individual weight gain values were higher; also, FCR and ECR were better. Blood biochemical parameters and meat chemical composition were not influenced by dietary savory supplementation. Despite the statistically significantly higher SFA content and lower levels of UFA,PUFA andn-3 in trout meat after savory supplementation, the PUFA/SFA andn-6/n-3 ratios remained within the range recommended for human nutrition: between 0.4 and5.
