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Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis)
Citation
Wirtz, A and Carter, CG and Codabaccus, MB and Fitzgibbon, QP and Townsend, AT and Smith, GG, Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis), Comparative Biochemistry and Physiology. Part A, 265 Article 111121. ISSN 1095-6433 (2022) [Refereed Article]
Copyright Statement
© 2021 Published by Elsevier Inc.
DOI: doi:10.1016/j.cbpa.2021.111121
Abstract
Apparent digestibility and gastrointestinal evacuation rate were measured to assess the potential of five commercially available protein sources for their inclusion in feeds for juvenile slipper lobster, Thenus australiensis. Protein sources tested were fishmeal, krill meal, lupin meal, soybean meal and squid by-product meal. Apparent digestibility of crude protein ranged from 79.6% to 95.3%, with fishmeal protein significantly less digestible than lupin meal, squid by-product meal and soybean meal. Gastrointestinal evacuation rate was estimated from marker replacement, where yttrium oxide replaced ytterbium oxide. Faeces were collected every 3 h for 48 h, and a kinetic model was used to calculate the rate and time for the second marker to replace the first marker. Gastrointestinal evacuation (≥ 95%) was completed between 4 and 6 h with no significant differences among protein sources. Faeces consisted of both markers in equal parts 2.7 to 5.0 h after the feed switch, with lupin meal reaching the midpoint significantly faster than squid by-product meal and reference feed. The present study is the first in crustaceans to examine the relationship between apparent digestibility and gastrointestinal evacuation, showing more digestible protein sources had slower evacuation rates. The combined approach provides deeper insight into crustaceans' digestive physiology and helps understand their ability to digest specific ingredients. Further research is recommended to understand protein requirements in a broader context to verify highly digestible protein sources meet all nutritional requirements.
Item Details
Item Type: | Refereed Article |
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Keywords: | lobster aquaculture, protein sources, apparent digestibility, gastrointestinal |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture |
Objective Division: | Animal Production and Animal Primary Products |
Objective Group: | Fisheries - aquaculture |
Objective Field: | Aquaculture rock lobster |
UTAS Author: | Wirtz, A (Ms Andrea Wirtz) |
UTAS Author: | Carter, CG (Professor Chris Carter) |
UTAS Author: | Codabaccus, MB (Dr Basseer Codabaccus) |
UTAS Author: | Fitzgibbon, QP (Associate Professor Quinn Fitzgibbon) |
UTAS Author: | Townsend, AT (Associate Professor Ashley Townsend) |
UTAS Author: | Smith, GG (Professor Gregory Smith) |
ID Code: | 148258 |
Year Published: | 2022 |
Funding Support: | Australian Research Council (IH190100014) |
Web of Science® Times Cited: | 4 |
Deposited By: | Fisheries and Aquaculture |
Deposited On: | 2021-12-15 |
Last Modified: | 2022-10-13 |
Downloads: | 0 |
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