A feeding trial was carried out to evaluate the growth performance and fatty acid metabolism of juvenile grayling (T. thymallus, L., Adriatic strain) in response to three diets supplying varying levels and ratios of essential fatty acids (n-3 PUFAs, 7, 12, 8 g/kg; n-6 PUFAs, 5, 10, 12 g/kg; n-3/n-6 ratios, 1.6, 1.2, 0.6). Each diet was fed to visual satiety over 9 weeks to triplicate fish groups, kept at 13.5±0.4°C, each consisting of 25 specimens (average wgt. 12±0.3 g). Regardless of the dietary n-3 PUFA content, fish growth and feed efficiency improved (P<0.05) by increasing dietary n-6 PUFA level or decreasing n-3/n-6 ratio. Based on ind
Growth performance and fatty acid metabolism in European grayling (Thymallus thymallus, L.) fed diets differing in n-3 and n-6 PUFA levels
TULLI, Francesca;CARDINALETTI, Gloriana;MESSINA, Maria;TIBALDI, Emilio
2011-01-01
Abstract
A feeding trial was carried out to evaluate the growth performance and fatty acid metabolism of juvenile grayling (T. thymallus, L., Adriatic strain) in response to three diets supplying varying levels and ratios of essential fatty acids (n-3 PUFAs, 7, 12, 8 g/kg; n-6 PUFAs, 5, 10, 12 g/kg; n-3/n-6 ratios, 1.6, 1.2, 0.6). Each diet was fed to visual satiety over 9 weeks to triplicate fish groups, kept at 13.5±0.4°C, each consisting of 25 specimens (average wgt. 12±0.3 g). Regardless of the dietary n-3 PUFA content, fish growth and feed efficiency improved (P<0.05) by increasing dietary n-6 PUFA level or decreasing n-3/n-6 ratio. Based on indI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
