Developing biomass assessment approaches, harvest methodologies and biosecurity knowledge for wild-harvest of seaweeds in southern Australia

Funded Activity Summary

After many years of interest but little on ground activity apart from a few established operations based on the harvest of beach-cast material, the seaweed industry is starting to gain momentum in southern Australia. There is particular interest in the farming of Asparagopsis for its methane reducing properties in ruminants, but also in several species for human consumption and other uses, including the golden kelp Ecklonia radiata. While much of the focus is on the development of an aquaculture industry, this needs to be supported by the wild harvest of seedstock, at least in the early years, and there is also some interest in wild-harvest for product. However, the knowledge base and tools available for managers to regulate this emerging industry are limited. This proposal aims to start filling in some of these gaps. The first is to develop an understanding of the biomass present in targeted areas, and importantly, the development of a rapid assessment tool to do this, which can then be used to form the basis of a stock assessment methodology as the industry expands. The second is to develop harvest methodologies that allow for the recovery of local stocks, and which can be used to inform rotational harvest strategies by documenting how long recovery takes. The third is to develop an understanding of some of the biosecurity issues likely to be faced by industry and regulators, which will allow managers to make informed decisions around translocation policies to both prevent the spread of disease, and to maintain the genetic integrity of natural populations.

Objectives:
1. Develop a rapid assessment tool for species specific subtidal macroalgal biomass, initially for Asparagopsis armata, A. taxiformis and E. radiata.
2. Develop harvesting methods for the above species that ensure that local populations are not depleted, and that ecosystem function is not compromised.
3. Review literature on macroalgae diseases, pests, health management strategies and population structure.
4. Identify information and approaches to define health management units.
5. Collate information and build an initial basic approach to translocation.

Funded Activity Details

Start Date: 31-03-2023

End Date: 30-01-2026

Funding Scheme: Funding Scheme not available

Funding Amount: $576,519.00

Funder: Fisheries Research and Development Corporation

Research Topics

ANZSRC Field of Research (FoR)

There are no FoR codes available for this funding activity

ANZSRC Socio-Economic Objective (SEO)

There are no SEO codes available for this funding activity

Other Keywords

Aquaculture | Artificial Intelligence | RAC SA | Seaweed

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