whole_HindrumStephen2004.pdf (32.74 MB)
Factors influencing growth and water quality in experimental abalone culture systems
thesisposted on 2023-05-26, 17:45 authored by Hindrum, S
Abalone culture is becoming increasingly important as over-exploitation and poaching worldwide are depleting wild stocks, yet demand for abalone products continues to increase. Although techniques for nursery production of juveniles and grow-out to market size are well established, optimization of growth rates and maintaining stock health requires a better understanding of factors influencing growth, water quality and health status during the grow-out phase. Previous studies on abalone at the University of Tasmania have investigated a range of husbandry, nutritional and water quality issues. The research covered in the current study used a range of experimental scale grow-out systems, in conjunction with a bioassay system, to investigate a number of factors previously identified as potentially affecting growth and water quality in commercial grow-out systems for greenlip (Haliotis laevigata) and blacklip (H rubra) abalone. Previous work has investigated the effect of environmental ammonia and low dissolved oxygen levels on abalone growth as separate exposures (Harris 1999). For the present study, this work was expanded to investigate the effect on growth of low dissolved oxygen levels combined with elevated ammonia levels as both chronic exposure and as intermittent, 8-hour exposures in two separate trials.
Rights statementCopyright 2004 the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s). Thesis (Ph.D)--University of Tasmania, 2004. Includes bibliographical references