Effect of dietary Houttuynia cordata leaf meal and leaf extract on the growth performance, nutrient utilization and expression of IGF‐I gene in Labeo rohita. (11th February 2019)

• Record Type: Journal Article
• Authors: Garg, Chetan K.; Sahu, Narottam P.; Shamna, N.; Deo, Ashutosh D.; Fawole, Femi J.; Kumar, Sarvendra; Maiti, Manas K.
• Is Part Of: Aquaculture nutrition. Volume 25:Number 3(2019)
• Page Start: 702
• Page End: 711
• Publication Date: 2019-02-11
• Subjects: Growth promoter -- Houttuynia cordata -- IGF‐I -- Labeo rohita -- leaf extract -- leaf meal; Aquaculture -- Periodicals; Aquatic animals -- Feeding and feeds -- Periodicals; Fishes -- Feeding and feeds -- Periodicals; 639.3
• DOI: 10.1111/anu.12891
• Languages: English
• ISSNs: 1353-5773

Abstract

Abstract: A 60‐day feeding trial was conducted to evaluate the effects of feeding Houttuynia cordata leaf meal and extract on the growth performance, nutrient utilization and expression of insulin‐like growth factor‐I (IGF‐I) in Labeo rohita fingerlings. Two hundred seventy fingerlings were randomly distributed in six experimental groups in triplicates. Six isonitrogenous (350 g/kg CP) and isocaloric (17 MJ/kg DE) diets were prepared with graded levels of leaf meal (LM) and leaf extract (LE), namely C (control, without LE and LM), LE‐0.25 (2.5 g/kg LE), LE‐0.5 (5 g/kg LE), LE‐1.0 (10 g/kg LE), LM‐1.0 (10 g/kg LM) and LM‐2.0 (20 g/kg LM). Significantly ( p < 0.05) higher IGF‐I expression, weight gain %, specific growth rate and lower feed conversion ratio were observed in LM‐1.0 followed by LE‐1.0 group compared to control group. Higher protease activity was observed in LE‐1.0 compared to other experimental groups, while no significant changes were found for amylase and lipase activities. Compared to control, muscle alanine aminotransferase and aspartate aminotransferase activities were significantly higher in treatment groups except for LM‐2.0. These results suggest that either LE‐1.0 or LM‐1.0 can be supplemented in the diet to improve the growth of L. rohita. However, the supplementation of 10 g H. cordata leaf meal/kg feed can be the better option considering the cost of extraction .