نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه خلیج فارس، بوشهر، بوشهر؛ گروه شیلات، دانشکده علوم و فناوری نانو و زیستی، دانشگاه خلیج فارس، بوشهر، بوشهر
2 گروه شیلات، دانشکده علوم و فنون دریایی، دانشگاه خلیج فارس، بوشهر، بوشهر
3 پژوهشکده خلیج فارس، دانشگاه خلیج فارس، بوشهر، بوشهر
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to evaluate the effects of different dietary levels of butyric acid on growth performance, immunity and digestive enzyme activities in yellowfin seabream (Acanthopagrus latus) (8.59 ± 0.33 g) at the period of 60 days. After 2-week adaptation, 120 fish with a density of 10 fish/tank in a completely randomized design were distributed to 12 tanks. Fish were fed with 4 levels of butyric acid including zero (control), 2.5 (T1), 5 (T2) and 10 g/kg (T3) of diet 2 times per day. The results showed that different levels of butyric acid in diet had significant effects on growth performance and nutritional indices compared to the control (p<0.05). However, protein productive value of T1 and control exhibited no significant difference (p>0.05). The food conversion ratio in control group was significantly higher than in the other treatments (p<0.05). Nonspecific immune responses, lysozyme activity and ACH50 in T3 were also significantly higher than in the other treatments (p<0.05). Protease activity in T3 and also amylase in T2 and T3 were significantly increased compared to the control (p<0.05), whereas lipase activity did not exhibit any significant difference (p>0.05). In conclusion, butyric acid, especially at the level of 10 g/kg of diet, displayed positive effects on the growth, immune indices and enzyme activities in yellowfin seabream.
کلیدواژهها [English]