Optimum dietary methionine requirement of juvenile silver pompano, Trachinotus blochii (Lacepede, 1801)

Ebeneezar, Sanal and Vijayagopal, P and Srivastava, P P and Gupta, Subhodh and Varghese, Tincy and Linga Prabu, D and Chandrasekhar, S and Varghese, Eldho and Tejpal, C S and Anikuttan, K K and Sayooj, P and Wilson, Livi (2020) Optimum dietary methionine requirement of juvenile silver pompano, Trachinotus blochii (Lacepede, 1801). Animal Feed Science and Technology, 268. pp. 1-13.

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    Abstract

    In this study, we optimized the dietary methionine requirement of juvenile silver pompano (average initial weight of 5.47 g). Six isonitrogenous and isolipidic diets (420 g/kg crude protein [CP] and 60 g/kg lipid) were formulated with different concentrations of methionine (5.1, 6.9, 9.0, 10.7, 13.1, and 15.2 g/kg dry diet) and a constant level of cysteine (5.3 g/kg). Fishes were randomly stocked in a recirculatory system for a feeding trial of 90 days. After the feeding trial, significant differences (P<0.05) were observed in growth parameters such as weight gain (WG), specific growth rate (SGR), thermal growth coefficient (TGC), and feed utilization indices, including feed conversion ratio (FCR) and protein efficiency ratio (PER), among different treatment groups. No significant differences (P>0.05) were observed among hepatosomatic index, viscerosomatic index, muscle ratio, condition factor, serum glucose, triglycerides, and erythrocyte count. The optimization of the fitted quadratic regression for WG, SGR, TGC, FCR, and PER based on the dietary methionine level showed that the optimum methionine requirement of silver pompano in nursery phase ranged from 11.6–11.8 g/kg dry diet (27.6–28.1 g/kg dietary CP), corresponding to a dietary cysteine level of 5.3 g/kg.

    Item Type: Article
    Uncontrolled Keywords: Methionine; Silver pompano; Cysteine; Amino acid
    Subjects: Fish and Fisheries > Fish Nutrition
    Food and Feeding
    Aquaculture
    Divisions: CMFRI-Kochi > Marine Biotechnology
    Subject Area > CMFRI > CMFRI-Kochi > Marine Biotechnology
    CMFRI-Kochi > Marine Biotechnology
    Subject Area > CMFRI-Kochi > Marine Biotechnology
    Depositing User: Arun Surendran
    Date Deposited: 14 Aug 2020 06:22
    Last Modified: 14 Aug 2020 06:22
    URI: http://eprints.cmfri.org.in/id/eprint/14470

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