Betaine is a feed enhancer for juvenile grouper (Epinephelus fuscoguttatus) as determined behaviourally

Lim, Leong Seng and Rossita Shapawi, and Chor, Wei Kang and Audrey Daning Tuzan, and Gunzo Kawamura, (2016) Betaine is a feed enhancer for juvenile grouper (Epinephelus fuscoguttatus) as determined behaviourally. Journal of Applied Animal Research, 44 (1). pp. 415-418. ISSN 0971-2119

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Abstract

The present study aimed to determine if betaine can function as a feeding stimulant or feed enhancer for the juvenile grouper, Epinephelus fuscoguttatus through a behavioural experiment with video recording. Agar gel pellet was used as the medium to deliver the chemical test substances – betaine (BET), amino acids mixture (AAM) and mixtures of 1:1, 1:2, 1:3, 1:4, 1:5 BET + AAM to the fish. The pure agar gel (PAG) and feed extract pellets were used as the negative and positive control, respectively. From the recorded videos, two parameters were observed: (I) the pellet was consumed or rejected [A] – if consumed, recorded 1; if rejected, recorded 0, and (II) frequency of the pellet has been captured before it was consumed or rejected and ignored [B], and the preference index was calculated through [A]/[B]. The PAG pellet was totally rejected by the fish (index's value = 0). The index's values of BET and AAM were 0.17 ± 0.39 and 0.19 ± 0.31 (mean ± SD), respectively. No significant difference was found among the index's values of PAG, BET and AAM pellets. However, the index's values of all BET + AAM pellets (1:1–1:5) were very high (0.60–0.90), and were significantly higher than those of the PAG, BET and AAM pellets. No significant difference was found among the index's value of 1:1, 1:2, 1:3 and 1:4 BET + AAM treatments. These results concluded that betaine is a feed enhancer for the E. fuscoguttatus and little amount of betaine supplementation is sufficient to enhance the flavour of amino acids mixture.

Item Type: Article
Uncontrolled Keywords: Betaine, feed enhancer, grouper, Epinephelus fuscoguttatus, juvenile
Subjects: S Agriculture > SF Animal culture
Divisions: SCHOOL > Borneo Marine Research Institute
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 12 Aug 2016 03:32
Last Modified: 23 Oct 2017 05:47
URI: http://eprints.ums.edu.my/id/eprint/13854

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