Benefits and risks of including the bromoform containing seaweed Asparagopsis in feed for the reduction of methane production from ruminants

Glasson, Christopher R.K., Kinley, Robert D., de Nys, Rocky, King, Nick, Adams, Serean L., Packer, Michael A., Svenson, Johan, Eason, Charles T., and Magnusson, Marie (2022) Benefits and risks of including the bromoform containing seaweed Asparagopsis in feed for the reduction of methane production from ruminants. Algal Research, 64. 102673.

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The agricultural production of ruminants is responsible for 24% of global methane emissions, contributing 39% of emissions of this greenhouse gas from the agricultural sector. Strategies to mitigate ruminant methanogenesis include the use of methanogen inhibitors. For example, the seaweeds Asparagopsis taxiformis and Asparagopsis armata included at low levels in the feed of cattle and sheep inhibit methanogenesis by up to 98%, with evidence of improvements in feed utilisation efficiency. This has resulted in an increasing interest in and demand for these seaweeds globally. In response, research is progressing rapidly to facilitate Asparagopsis cultivation at large scale, and to develop aquaculture production systems to enable a high quality and consistent supply chain. In addition to developing robust strategies for sustainable production, it is important to consider and evaluate the benefits and risks associated with its production and subsequent use as an antimethanogenic feed ingredient for ruminant livestock. This review focuses on the relevant ruminal biochemical pathways, degradation, and toxicological risks associated with bromoform (CHBr3), the major active ingredient for inhibition of methanogenesis in Asparagopsis, and the effects that production of Asparagopsis and its use as a ruminant feed ingredient might have on atmospheric chemistry.

Item ID: 74290
Item Type: Article (Research - C1)
ISSN: 2211-9264
Keywords: Asparagopsis, Methane mitigation, Greenhouse gas, Toxicology, Atmospheric chemistry, Ozone depletion
Copyright Information: © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (
Date Deposited: 25 May 2022 07:36
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3003 Animal production > 300307 Environmental studies in animal production @ 100%
SEO Codes: 19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1903 Mitigation of climate change > 190302 Management of greenhouse gas emissions from animal production @ 100%
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