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Hatchery conditions do not negatively impact respiratory response of early life-stage development in Australian hybrid abalone

Citation

Alter, K and Andrewartha, SJ and Elliott, NG, Hatchery conditions do not negatively impact respiratory response of early life-stage development in Australian hybrid abalone, Journal of Shellfish Research, 35, (3) pp. 585-591. ISSN 0730-8000 (2016) [Refereed Article]


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DOI: doi:10.2983/035.035.0303

Abstract

On Australian aquaculture farms, early life stages of abalone are reared under controlled abiotic and biotic conditions in an attempt to optimize individual growth and reduce potential stressors. Yet, physiological responses to the rearing conditions are largely unknown. This study tests if commercial stocking densities, light conditions, and oxygen levels influence the oxygen consumption rate (ṀO2) of early life stages of Haliotis rubra and Haliotis laevigata hybrids at a standard commercial hatchery temperature of 16C. Oxygen consumption rate of fertilized eggs and larvae in the trochophore, mid-veliger, and early benthic veliger stages were measured at densities from 100 to 2,400 individuals/ml, in light and dark conditions and oxygen levels of 100%0% air saturation (%O2sat). Neither density nor light conditions affected ṀO2 of any of the tested life stages. Normoxic ṀO2 varied across developmental stage and was higher in the actively swimming mid-veliger stages (114.92 2.68 pmol O2/ind/h) in comparison with less active earlier (49.48 2.33 pmol O2/ind/h) and later life stages (65.90 3.05 pmol O2/ind/h). Critical oxygen tensions, taken as the point at which animals could no longer maintain ṀO2, ranged from 22.7% 2.7%O2sat in fertilized eggs to 14.0% 1.0% O2sat in mid-veliger larvae. These results suggest that current conditions in Australian abalone aquaculture farms should not negatively impact the development of early life stages of hybrid abalones.

Item Details

Item Type:Refereed Article
Keywords:hybrid, hatchery, metabolism, development
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Molluscs (excl. Oysters)
Author:Alter, K (Ms Katharina Alter)
ID Code:114348
Year Published:2016
Deposited By:Centre for Fisheries and Aquaculture
Deposited On:2017-02-14
Last Modified:2017-02-23
Downloads:0

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