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The capacity of oysters to regulate energy metabolism-related processes may be key to their resilience against ocean acidification

Citation

Goncalves, P and Anderson, K and Raftos, DA and Thompson, EL, The capacity of oysters to regulate energy metabolism-related processes may be key to their resilience against ocean acidification, Aquaculture Research, 49, (5) pp. 2059-2071. ISSN 1355-557X (2018) [Refereed Article]

Copyright Statement

Copyright 2018 John Wiley & Sons Ltd.

DOI: doi:10.1111/are.13663

Abstract

Bivalve molluscs, such as oysters, are threatened by shifts in seawater chemistry resulting from climate change. However, a few species and populations within a species stand out for their capacity to cope with the impacts of climate change‐associated stressors. Understanding the intracellular basis of such differential responses can contribute to the development of strategies to minimise the pervasive effects of a changing ocean on marine organisms. In this study, we explored the intracellular responses to ocean acidification in two genetically distinct populations of Sydney rock oysters (Saccostrea glomerata). Selectively bred and wild type oysters exhibited markedly different mitochondrial integrities (mitochondrial membrane potential) and levels of reactive oxygen species (ROS) in their hemocytes under CO2 stress. Analysis of these cellular parameters after 4 and 15 days of exposure to elevated CO2 indicated that the onset of intracellular responses occurred earlier in the selectively bred oysters when compared to the wild type population. This may be due to an inherent capacity for increased intracellular energy production or adaptive energy reallocation in the selectively bred population. The differences observed in mitochondrial integrity and in ROS formation between oyster breeding lines reveal candidate biological processes that may underlie resilience or susceptibility to ocean acidification. Such processes can be targeted in breeding programs aiming to mitigate the impacts of climate change on threatened species.

Item Details

Item Type:Refereed Article
Keywords:climate change, environmental stress, hemocytes, reactive oxygen species, Saccostrea glomerata, selective breeding
Research Division:Biological Sciences
Research Group:Biochemistry and Cell Biology
Research Field:Cell Metabolism
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Oysters
Author:Anderson, K (Dr Kelli Anderson)
ID Code:127611
Year Published:2018
Deposited By:Fisheries and Aquaculture
Deposited On:2018-08-06
Last Modified:2018-09-05
Downloads:0

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