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Response of Atlantic salmon Salmo salar to temperature and dissolved oxygen extremes established using animal-borne environmental sensors


Stehfest, KM and Carter, CG and McAllister, JD and Ross, JD and Semmens, JM, Response of Atlantic salmon Salmo salar to temperature and dissolved oxygen extremes established using animal-borne environmental sensors, Scientific Reports, 7 Article 4545. ISSN 2045-2322 (2017) [Refereed Article]


Copyright Statement

Copyright 2015 The authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1038/s41598-017-04806-2


Understanding how aquatic species respond to extremes of DO and temperature is crucial for determining how they will be affected by climate change, which is predicted to increasingly expose them to levels beyond their optima. In this study we used novel animal-borne DO, temperature and depth sensors to determine the effect of extremes of DO and temperature on the vertical habitat use of Atlantic salmon Salmo salar in aquaculture cages. Salmon showed a preference for temperatures around 16.5 to 17.5C, however, selection of preferred temperatures was trumped by active avoidance of low DO (<35% saturation) at the bottom of the cage. In addition to low DO, salmon also avoided warm surface waters (>20.1C), which led to a considerable contraction in the available vertical habitat. Despite their avoidance behavior, fish spent a large amount of time in waters with suboptimal DO (<60% saturation). These results show that vertical habitat contraction could likely be a significant consequence of climate change if the reduction in DO outpaces the increase in hypoxia tolerance through local adaptation. They furthermore highlight that site-specific environmental conditions and stock-specific tolerance thresholds may need to be considered when determining stocking densities.

Item Details

Item Type:Refereed Article
Keywords:salmon, aquaculture, climate change, telemetry
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Stehfest, KM (Dr Kilian Stehfest)
UTAS Author:Carter, CG (Professor Chris Carter)
UTAS Author:McAllister, JD (Dr Jaime McAllister)
UTAS Author:Ross, JD (Associate Professor Jeff Ross)
UTAS Author:Semmens, JM (Professor Jayson Semmens)
ID Code:118288
Year Published:2017
Web of Science® Times Cited:67
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-07-10
Last Modified:2018-03-20
Downloads:127 View Download Statistics

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