Seaweeds are promising ingredients for aquafeed for improving fish growth and as source of n3 fatty acids. The Ppresent study aimed at assessing the effects on marketable and qualitative traits of rainbow trout (Oncorhynchus mykiss , Walbaum 1792) fillets of a low-level inclusion (around 5%) of a commercial mix of seaweeds formulation in a soybean-rich diet. The Ffish were fed for 12 weeks and sampled immediately after the acclimation period (T0), after 6 weeks (T1) and 12 weeks (end of the trial, T2). Six fish per treatment were sacrificed at each sampling, individually weighed and submitted to the sectioning of theto obtain the body components that, after for the measurements, were needed to calculate the marketable indexes (condition factor, dressed and fillet yields, hepatosomatic index and viscerosomatic index). On fillets, physical properties such as pH, texture and colourcolor were measured and the cholesterol content, the proximate, an andd the fatty acid composition were analysedanalyzed. Results revealed that the inclusion of seaweeds mixture in a soybean rich diet significantly affected condition factorfillet yield and hepatosomatic index after 12 weeks of administration. The Pphysical parameters of muscle, such as colourcolor, pH, water holding capacity and texture were not modified in comparison to the vegetable rich diet. Slight modifications infor the chemical proximate composition emerged at the end of the trial, especially concerning the protein content, which increased in parallel to a decrease of lipid content. However, the fatty acid profile of the muscle was deeply modified by the diets administered, since diets in comparison to the first 6 weeks. The inclusion level of seaweeds here utilized in the present study was not sufficient for improving PUFAn-3 level of a diet rich in vegetable protein and oil

Effect of including seaweed meal in the diet on slaughter yield and major quality traits of rainbow trout (Oncorhynchus mikiss Walbaum, 1792) / L. BRUNI, G. SECCI, F. FACCENDA, G. PARISI. - ELETTRONICO. - (2018), pp. 53-55. (Intervento presentato al convegno 49° Congresso della Società Italiana di Biologia Marina).

Effect of including seaweed meal in the diet on slaughter yield and major quality traits of rainbow trout (Oncorhynchus mikiss Walbaum, 1792)

L. BRUNI
Formal Analysis
;
G. SECCI
Writing – Original Draft Preparation
;
G. PARISI
Supervision
2018

Abstract

Seaweeds are promising ingredients for aquafeed for improving fish growth and as source of n3 fatty acids. The Ppresent study aimed at assessing the effects on marketable and qualitative traits of rainbow trout (Oncorhynchus mykiss , Walbaum 1792) fillets of a low-level inclusion (around 5%) of a commercial mix of seaweeds formulation in a soybean-rich diet. The Ffish were fed for 12 weeks and sampled immediately after the acclimation period (T0), after 6 weeks (T1) and 12 weeks (end of the trial, T2). Six fish per treatment were sacrificed at each sampling, individually weighed and submitted to the sectioning of theto obtain the body components that, after for the measurements, were needed to calculate the marketable indexes (condition factor, dressed and fillet yields, hepatosomatic index and viscerosomatic index). On fillets, physical properties such as pH, texture and colourcolor were measured and the cholesterol content, the proximate, an andd the fatty acid composition were analysedanalyzed. Results revealed that the inclusion of seaweeds mixture in a soybean rich diet significantly affected condition factorfillet yield and hepatosomatic index after 12 weeks of administration. The Pphysical parameters of muscle, such as colourcolor, pH, water holding capacity and texture were not modified in comparison to the vegetable rich diet. Slight modifications infor the chemical proximate composition emerged at the end of the trial, especially concerning the protein content, which increased in parallel to a decrease of lipid content. However, the fatty acid profile of the muscle was deeply modified by the diets administered, since diets in comparison to the first 6 weeks. The inclusion level of seaweeds here utilized in the present study was not sufficient for improving PUFAn-3 level of a diet rich in vegetable protein and oil
2018
Biologia Marina Mediterannea
49° Congresso della Società Italiana di Biologia Marina
L. BRUNI, G. SECCI, F. FACCENDA, G. PARISI
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1129534
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