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A range of experiments aimed at optimizing broodstock performance and nursery culture of greenlip abalone (Haliotis laevigata) were undertaken in Western Australia. Factors investigated that can potentially influence broodstock performance were natal source (wild-caught or farm-grown) and broodstock diets (red algal diet or formulated diet varying in levels of an important fatty acid). Wild-caught broodstock, feeding mainly on a red seaweed diet, produced eggs with higher concentrations of an important fatty acid, arachidonic acid, whereas farm-grown broodstock, feeding on a commercial formulated diet, altered the concentration of fatty acids of the eggs. Feeding farm-grown broodstock natural diets like red seaweeds will be beneficial to the performance of the offspring and this practice is recommended 3 months prior to spawning. Nursery production was optimized by determining the right diatom species for the right stage of juvenile production and with the gradual weaning of juveniles onto formulated feed once juveniles reach about 7mm in shell length. Supplementing diets with juvenile stages of seaweeds will be beneficial under sub-optimal environmental conditions such as high seawater temperature. The project has successfully developed algal culture techniques to facilitate this practice. Diatom culture is not economic to maintain high growth rates of large juveniles (>7mm in shell length). However, seaweed culture is possible with minimal additional infrastructure cost, if used for targeted and specific purposes, like supplementary feeding juvenile abalone and broodstock abalone.
1 8770 98 93 0
Department of Fisheries
Perth, Western Australia
Greenlip abalone, Haliotis laevigata, Abalone culture, Fecundity, Brood stocks, Diets, Cost analysis, Western Australia
Aquaculture and Fisheries
Daume, S. (2007), Improvement and evaluation of greenlip abalone hatchery and nursery production. Final FRDC report - project 2003/203. Department of Fisheries, Perth, Western Australia. Book.