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Low dissolved oxygen reduces growth rate and oxygen consumption rate of juvenile greenlip abalone, Haliotis laevigata Donovan

Citation

Harris, J and Maguire, GB and Edwards, SJ and Johns, DR, Low dissolved oxygen reduces growth rate and oxygen consumption rate of juvenile greenlip abalone, Haliotis laevigata Donovan, Aquaculture, 174, (3-4) pp. 265-278. ISSN 0044-8486 (1999) [Refereed Article]

DOI: doi:10.1016/S0044-8486(99)00022-8

Abstract

Juvenile greentip abalone, Haliotis laevigata, (whole weight 10.8 ± 3.0 g, mean ± SD, n = 603) were grown for 57-77 days in bioassay tanks at a range of dissolved oxygen (DO) concentrations (4.2-8.9 mg DO l -1; 55-117% oxygen saturation). Specific growth rate (SGR) was significantly affected by hypoxia whether measured on a length (P < 0.01) or whole weight (P < 0.001) basis. For growth expressed on a whole weight basis, the EC 5 and EC 50 values (5 and 50% reductions in growth rate) were 7.36 and 5.91 mg DO l -1 (96 and 77% saturation), respectively. Shell growth rates declined over the entire experimental range. At the end of the bioassay, groups of abalone were transferred to respiratory chambers. Oxygen consumption by juvenile greenlip abalone was significantly affected by the external oxygen concentration (P < 0.01). The EC 5 and EC 50 values (5 and 50% reductions in respiration rate) were 6.16 and 5.19 mg DO l -1 (80 and 68% saturation), respectively. Oxygen consumption was estimated to be independent of external oxygen concentration in the range 6.25 mg-8.9 DO 1 -1 (81-117% oxygen saturation).

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Harris, J (Dr James Harris)
Author:Maguire, GB (Dr Greg Maguire)
Author:Edwards, SJ (Dr Steve Edwards)
Author:Johns, DR ( Johns)
ID Code:16596
Year Published:1999
Web of Science® Times Cited:49
Deposited By:TAFI - Aquaculture
Deposited On:1999-08-01
Last Modified:2000-06-07
Downloads:0

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