Dietary protein requirement of Indian Butter catfish, Ompok bimaculatus (Bloch) fingerlings. Issue 2 (2nd April 2020)

• Record Type: Journal Article
• Authors: Biswas, Pradyut; Jena, Alok Kumar; Patel, Arun Bhai; Pandey, Pramod Kumar
• Is Part Of: Journal of applied aquaculture. Volume 32:Issue 2(2020)
• Page Start: 107
• Page End: 123
• Publication Date: 2020-04-02
• Subjects: Ompok bimaculatus -- protein requirements -- growth -- feed utilisation -- digestive enzymes -- proximate composition; Aquaculture -- Periodicals; Fish culture -- Periodicals; 639.8
• DOI: 10.1080/10454438.2019.1633984
• Languages: English
• ISSNs: 1045-4438

Abstract

ABSTRACT: A 60-d feeding trial was conducted to assess the dietary protein requirement of Indian Butter catfish, Ompok bimaculatus fingerlings. Five iso-energetic semi-purified diets were formulated with varying levels of crude protein (25–45%) and fed to the experimental fish (3.29 ± 0.01 g) twice daily at satiation level in triplicate groups. Fishes were reared in indoor tanks with a stocking density of 11 fingerlings per tank. The results showed that the growth of the fish increased significantly ( P < .05) with increasing protein levels upto 35% and decreased thereafter. Highest ( P < .05) weight gain (247.25 ± 5.76%), carcass protein content (16.78 ± 0.04%) and protease activity (0.46 ± 0.02) coupled with lowest FCR (1.62 ± 0.04) were observed in the fish fed with 35% protein. PER and ANPR were found to decrease with increasing dietary protein levels ( P < .05). Based on the second-order polynomial regression analysis of WG, it may be concluded that the dietary protein requirement of O. bimaculatus is 36.11% with a P/E ratio of 23.11 g protein MJ −1 as indicated by the maximum growth.