
Aquaculture Reports, Год журнала: 2024, Номер 35, С. 101984 - 101984
Опубликована: Фев. 22, 2024
Immunostimulants, including seaweed, can play a significant role in increasing the immune response and preventing occurrence of diseases aquatic animals. These stimulants increase fish's disease resistance by strengthening nonspecific system. This study aimed to investigate effects red macroalgae extract Laurencia caspica (Lc) on mucosal immunity, growth, serum biochemical parameters, mucus bactericidal activity, digestive enzymes, against S. iniae A. hydrophila Nile tilapia. Fish with an average weight 100 ± 2 g were fed Lc algae at four levels (0, 0.5, 1 2%) for 50 days. The gain (WG), food conversion ratio (FCR), specific growth rate (SGR) significantly increased compared control group (P < 0.05). activity was no effect Streptococcus (S. iniae), > However, it Additionally, there Aeromonas (A. hydrophila) not amount total protein (Tp), albumin (Alb), globulin (Glb), cholesterol (Chol) 0.05), although triglyceride (TG) 2% 25th day had Lysozyme (except 0.5% 50th day) immunoglobulin (Ig) (in all groups) enzymes such as trypsin α-amylase days Lipase enzyme extracts groups substantially survival fish challenged higher than 0.0001). Overall, be concluded that immunity. Also, induces improve tilapia growth.
Язык: Английский