Standard Presentation (15 mins) Australian Marine Sciences Association 2022

Developing Diets for Aquaculture Production of Corals (#429)

Lone Hoj 1 , Alessandro DP Carini 1 , Julia Saper 2 , Andrea Severati 1 , Melissa Rocker 3 , Tom Mock 3 , Craig Humphrey 1 , David G Bourne 2 , David Francis 3
  1. Australian Institute Of Marine Science, TOWNSVILLE, QLD, Australia
  2. College of Science and Engineering, James Cook University, Townsville, Queensland, Australia
  3. School of Life and Environmental Sciences , Deakin University, Geelong, Victoria, Australia

The development of suitable feeds for coral recruits will underpin their health, growth, and development rates, thereby enhancing the feasibility and cost effectiveness of coral aquaculture operations. Uptake of live feeds (rotifers, copepods, Artemia) by fragments of coral species of varying polyp size and feeding behaviour was initially compared and quantified using histology and video approaches of coral fragments. An encapsulated coral diet (Prototype 1) was produced, and its ingestion confirmed via video analysis across recruits of Acropora tenuis, Platygyra sinensis, Platygyra daedalea, Lobophyllia sp, and Goniastrea retiformis. Capsules were captured and ingested more easily than the free-swimming live feeds, and recruits could therefore feed on capsules earlier in their development. Alternative encapsulated diets are being developed and trialled to facilitate improved acquisition of heterotrophic nutrition for coral recruits and asexually produced corals in captivity, thereby enhancing their growth and health metrics.