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Thermal preference increases during larval development of pure and hybrid abalone


Alter, K and Andrewartha, SJ and Clark, TD and Elliott, NG, Thermal preference increases during larval development of pure and hybrid abalone, Journal of Shellfish Research, 36, (1) pp. 141-149. ISSN 0730-8000 (2017) [Refereed Article]


Copyright Statement

2017 National Shellfisheries Association

DOI: doi:10.2983/035.036.0114


Temperature is one of the main factors influencing biological processes of ectothermic species. An optimum temperature of 1618C has been suggested for the development of early life stages of temperate Australian abalone, yet there are little physiological or behavioral data to support this suggestion. This study examines the acute thermal preferences (Tpref), swimming speeds (U), and oxygen consumption rates (ṀO2) of veliger larvae of blacklip abalone [Haliotis rubra (Leach, 1814)], greenlip abalone [Haliotis laevigata (Donovan, 1808)], and their interspecies hybrid. Thermal preference and U were measured in a thermal gradient with temperatures ranging from 12C to 25C, and ṀO2 was measured at 47 temperatures between 12C and 32C. Thermal preference increased in all three groups of abalone during development from a Tpref of 16C in 1-day-old early veligers to a Tpref of 20C in 3-day-old late veligers. Swimming speed increased with temperature in all three groups of abalone and increased with age in H. rubra and hybrids but not in H. laevigata. Veliger ṀO2 increased throughout the ecologically relevant temperature range in all three abalone groups. Higher temperatures were examined in hybrids, and it was found that ṀO2 reached a peak at 25C and declined thereafter. These results align with the temperatures that veligers may experience in their natural habitat and provide support that current temperatures maintained at Australian aquaculture hatcheries are within optimal ranges for larval performance.

Item Details

Item Type:Refereed Article
Keywords:aquaculture, abalone, behavioral thermoregulation, metabolism, early-life stages
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal physiological ecology
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Coastal or estuarine biodiversity
UTAS Author:Alter, K (Ms Katharina Alter)
UTAS Author:Andrewartha, SJ (Dr Sarah Andrewartha)
UTAS Author:Clark, TD (Dr Timothy Clark)
ID Code:116097
Year Published:2017
Deposited By:Fisheries and Aquaculture
Deposited On:2017-05-01
Last Modified:2018-04-30
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