Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/27359
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Partial utilization efficiencies of protein and methionine by barramundi (Lates calcarifer) in response to dietary methionine source and form
Author(s): Poppi, David A
Glencross, Brett D
Contact Email: b.d.glencross@stir.ac.uk
Keywords: barramundi
crystalline amino acids
methionine utilization
partial efficiency
protein utilization
Issue Date: 31-Jul-2018
Citation: Poppi DA & Glencross BD (2018) Partial utilization efficiencies of protein and methionine by barramundi (Lates calcarifer) in response to dietary methionine source and form. Aquaculture Research, 49 (7), pp. 2518-2526. https://doi.org/10.1111/are.13714
Abstract: An experiment was conducted with barramundi (Lates calcarifer) juveniles (initial weight 10.3 g ± 0.3 g) to examine the partial efficiency of utilization of methionine (Met) from intact protein (fishmeal or lupin protein concentrate) and a crystalline DL‐Met source. Fish were fed at one of three ration levels: Low (0.4 g/fish/day), Moderate (0.8 g/fish/day) and High (1.6 g/fish/day). Those fed the fishmeal‐based diet (Diet FML) at the highest ration level grew to an average weight of 37.3 ± 0.46 g, whereas those fed the Lupin Protein Concentrate (LPC)‐based diet fortified with all EAA (Diet LPCM) at the highest ration level grew to 25.4 ± 2.27 g. The weight of the fish fed the LPC diet with no additional Met (Diet LPC) even at the highest ration level declined over the course of the experiment resulting in a final weight of 9.2 ± 0.88 g, clearly demonstrating the impact of dietary Met deficiency. The partial efficiency of protein utilization was also significantly reduced when Met was limiting (a coefficient of 0.06, compared to 0.39 in the Met‐supplemented LPC diet). The results suggested that the partial efficiencies (coefficients) of both Met and protein utilization in diets where crystalline Met is the primary source of Met (Diet LPCM: 0.26 and 0.39 respectively) were significantly poorer than from an intact protein source (Diet FML: 0.89 and 0.67 respectively) when Met is provided in excess.
DOI Link: 10.1111/are.13714
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. This is the peer reviewed version of the following article: Poppi DA, Glencross BD. Partial utilization efficiencies of protein and methionine by barramundi (Lates calcarifer) in response to dietary methionine source and form. Aquac Res. 2018;49:2518–2526, which has been published in final form at https://doi.org/10.1111/are.13714. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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