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Growth and feed utilisation of juvenile greenlip abalone (Haliotis laevigata) in response to water temperatures and increasing dietary protein levels

Citation

Bansemer, MS and Harris, JO and Qin, JG and Adams, LR and Duong, DN and Stone, DAJ, Growth and feed utilisation of juvenile greenlip abalone (Haliotis laevigata) in response to water temperatures and increasing dietary protein levels, Aquaculture, 436 pp. 13-20. ISSN 0044-8486 (2015) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier B.V.

DOI: doi:10.1016/j.aquaculture.2014.10.033

Abstract

In this 91-day study, the interaction between four dietary crude protein (CP) levels (27, 30, 33 and 36% CP) and three water temperatures (14, 17 and 20C) on the growth and feed utilisation of 6-month old greenlip abalone (Haliotis laevigata) (0.91g) were investigated. Diets were formulated to be isoenergetic (12.5MJkg−1 digestible energy), containing a lipid level of ~3.6% and digestible protein from 17.99 to 28.57%. Abalone were fed to excess at 16:00h daily, and uneaten feed was collected the following day. The specific growth rate (SGR) of abalone improved significantly as water temperatures increased from 14 to 17 to 20C. In addition, apparent protein deposition was significantly higher in abalone at 17 and 20C compared to abalone at 14C. There was no significant effect of dietary protein level on SGR, but faster growing abalone at 20C compensated by consuming more feed when fed low dietary protein levels. In contrast, a significant positive relationship was observed between dietary protein level and feed consumption rate in slower growing abalone at 14 and 17C. A non-significant tendency for the apparent feed conversion ratio (FCR) to improve was observed in abalone fed high protein diets at 20C, while at 14C, abalone had a significantly poorer FCR, especially when fed high dietary protein levels. Based on results from the current study, it is plausible to heat land-based nursery systems in order to gain accelerated growth of juveniles before transfer to grow-out systems. Additionally, no benefits were apparent by feeding abalone high protein diets at 14 or 17C, and we therefore recommend a dietary protein level of 29% CP at 14 and 17C. While the SGR of abalone at 20C was not significantly influenced by dietary protein, the feed consumption rate decreased and there was a tendency for FCR to improve as dietary protein level increased. Therefore, it may be beneficial for abalone to be switched to a diet containing ~35% CP at water temperatures >20C.

Item Details

Item Type:Refereed Article
Keywords:abalone, temperature, protein requirement, digestibility
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Adams, LR (Dr Louise Adams)
ID Code:97172
Year Published:2015
Web of Science® Times Cited:8
Deposited By:IMAS Research and Education Centre
Deposited On:2014-12-04
Last Modified:2017-11-04
Downloads:0

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