Publication
Size-weight relationships for estimating harvestable biomass of Acropora corals on Australia's Great Barrier Reef
Publisher:
Elsevier BV
Date:
05-2022
DOI:
10.1016/J.MARENVRES.2022.105633
Abstract: Although hard corals (order Scleractinia) are listed in Appendix II of the Convention for the International Trade in Endangered Species (CITES), there is significant ongoing wild harvest and international trade, mostly for the aquarium industry. Acropora corals account for the majority of aquarium corals harvested and traded, but are also extremely vulnerable to fisheries-independent threats, especially climate-induced coral bleaching. Reconciling effects of coral harvesting is complicated as harvest limits are based on weight, while there is limited data on standing biomass of Acropora from different reef environments. Here, a management-friendly methodology that allows for quantification of Acropora spp. biomass is described and demonstrated, thus providing means for the development and implementation of a rigorous sustainable harvest strategy. We establish size-weight relationships for four growth forms of Acropora spp. harvested from Australia's Great Barrier Reef, to facilitate estimates of harvestable biomass and better understand the ecological context of current weight-based harvest levels and limits. Using these relationships, and field-based s ling at 12 sites across seven distinct reefs, the estimated biomass of Acropora spp. ranges from 0.12 kg ⋅ m