We track visits to the website to tell us how much traffic we are receiving. By closing this window, you agree to our use of cookies. To learn more, click "Manage Cookies"
Accept X
Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis ) 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. © 2021
About Research Hub Investigator(s)
Publication Year
2022
Citation
Wirtz, A., Carter, C.G., Codabaccus, M.B., Fitzgibbon, Q.P., Townsend, A.T. & Smith, G.G. 2022, "Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis)", Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology, vol. 265.
Link to this Publication
Back to our Publication List
The ARC Research Hub for Sustainable Onshore Lobster Aquaculture is funded by the Australian Government through the Australian Research Council Industrial Transformation Research Program. +61 3 6226 8268.
Copyright 2024 ARC Research Hub for Sustainable Onshore Lobster Aquaculture.
Top plus close key bars linkedin facebook pinterest youtube instagram facebook-blank linkedin-blank pinterest youtube instagram 
