Effects of different feeding rates on growth performance, intestinal digestive enzyme activity, and intestinal microbial composition of red swamp crayfish (Procambarus clarkii) DOI Open Access
Jinglong Chen, Hongyan Tian, Wuxiao Zhang

et al.

Israeli Journal of Aquaculture - Bamidgeh, Journal Year: 2024, Volume and Issue: 76(4)

Published: Nov. 18, 2024

The study aimed to investigate the effects of different feeding rates on growth, muscle composition, intestinal digestive enzyme activities, and microbiota composition juvenile crayfish ( Procambarus clarkii ). A total 240 with an initial body weight 8.33±0.50 g were randomly distributed into five groups, each group had three replicates. groups corresponded 2%, 4%, 6%, 8%, 10% per day (BW/day). trial lasted for six weeks. results showed that final (FBW), gain rate (WGR), specific growth (SGR) first increased when feed from 2% 6 % (P<0.05) then a decreased trend further increase rate, but no significant differences observed. conversion ratio (FCR) rise in which reached peak at (P<0.05). survival (SR), hepatosomatic index (HSI), condition factor (CF) unaffected by (P>0.05). moisture, crude protein, fat, ash contents remained unchanged among all groups. Intestinal activities lipase amylase (up 6%) increasing ACE Chao indices fed significantly lower than those relative abundance Firmicutes 8% was higher other (P<0.05), Citrobacter 6% primarily functions connection amino acid, carbohydrate, vitamin metabolism. Therefore, optimum could be 6.0% P. .

Language: Английский

Effects of different feeding rates on growth performance, intestinal digestive enzyme activity, and intestinal microbial composition of red swamp crayfish (Procambarus clarkii) DOI Open Access
Jinglong Chen, Hongyan Tian, Wuxiao Zhang

et al.

Israeli Journal of Aquaculture - Bamidgeh, Journal Year: 2024, Volume and Issue: 76(4)

Published: Nov. 18, 2024

The study aimed to investigate the effects of different feeding rates on growth, muscle composition, intestinal digestive enzyme activities, and microbiota composition juvenile crayfish ( Procambarus clarkii ). A total 240 with an initial body weight 8.33±0.50 g were randomly distributed into five groups, each group had three replicates. groups corresponded 2%, 4%, 6%, 8%, 10% per day (BW/day). trial lasted for six weeks. results showed that final (FBW), gain rate (WGR), specific growth (SGR) first increased when feed from 2% 6 % (P<0.05) then a decreased trend further increase rate, but no significant differences observed. conversion ratio (FCR) rise in which reached peak at (P<0.05). survival (SR), hepatosomatic index (HSI), condition factor (CF) unaffected by (P>0.05). moisture, crude protein, fat, ash contents remained unchanged among all groups. Intestinal activities lipase amylase (up 6%) increasing ACE Chao indices fed significantly lower than those relative abundance Firmicutes 8% was higher other (P<0.05), Citrobacter 6% primarily functions connection amino acid, carbohydrate, vitamin metabolism. Therefore, optimum could be 6.0% P. .

Language: Английский

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