Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/61705
Title: Determining the dose response for red seaweed to achieve methane mitigation in Merino sheep fed high-fibre diets
Contributor(s): Adam, Charlotte (author); Sitienei, Daniel  (author)orcid ; Tomkins, Nigel (author); Doyle, Emma  (author)orcid ; Preston, James  (author); Kahn, Lewis  (author)orcid ; Davison, Thomas  (author); Cowley, Fran  (author)orcid 
Publication Date: 2024-07
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/61705
Open Access Link: https://www.aaap2024.com/programOpen Access Link
Abstract: 

The macroalgae, Asparagopsis spp. naturally synthesizes and accumulates halogenated compounds such as bromoform, which has shown to be an effective enteric methane inhibitor. In sheep, a methane reduction of 80% was observed when A. taxiformis was included at 3% (OM basis) compared with the control (Li et al., 2018). Li et al. (2018) included the Asparagopsis in a modified total-mixed ration of a pelleted basal ration with additional crushed lupins as the carrier. Work in beef cattle (Kinley et al., 2020) reported high abatements (80% at 0.2% OM inclusion in comparison to the control) in a total-mixed ration. The effects of diet composition, namely increasing fibre content and influence on enteric methane abatement has also been reported (Roque et al., 2021), with lower abatement associated with higher dietary fibre. In Australia, most sheep are managed in extensive systems consisting of high-fibre forage diets and are unlikely to be offered a feed additive in a total mixed ration. At present, it is unknown what the recommended dietary inclusion level of A. taxiformis is for grazing systems, where animals are on a high-fibre diet. The aim of this study was to determine the dose-response of bromoform presented in a canola oil (SEAFEED™ SeaForest Pty Ltd) using a supplementary pellet as a carrier for sheep fed a high-fibre diet.

Publication Type: Conference Publication
Conference Details: AAAS/AAAP 2024: the 35th Biennial Conference of the Australian Association of Animal Sciences and the 20th Asian-Australasian Association of Animal Production Societies, Melbourne, Australia, 9th - 12th July
Source of Publication: Proceedings of the 35th Biennial Conference of the Australian Association of Animal Sciences and the 20th Asian-Australasian Association of Animal Production Societies, v.35, p. 167-168
Publisher: Australian Association of Animal Sciences
Place of Publication: Australia
ISSN: 0728-5965
Fields of Research (FoR) 2020: 300307 Environmental studies in animal production
Peer Reviewed: Yes
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Appears in Collections:Conference Publication
School of Environmental and Rural Science

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