Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar )
Global seawater temperatures are increasing and becoming more variable, with consequences for all marine animals including those in food production systems. In several countries around the world, arming of Atlantic salmon ( Salmo salar ) occurs towards the upper end of the thermal tolerance window f...
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Online Access: | https://doi.org/10.1016/j.jtherbio.2018.12.021 http://www.ncbi.nlm.nih.gov/pubmed/30784489 http://ecite.utas.edu.au/139816 |
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ftunivtasecite:oai:ecite.utas.edu.au:139816 2023-05-15T15:31:15+02:00 Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) Wade, NM Clark, TD Maynard, BT Atherton, S Wilkinson, RJ Smullen, RP Taylor, RS 2019 https://doi.org/10.1016/j.jtherbio.2018.12.021 http://www.ncbi.nlm.nih.gov/pubmed/30784489 http://ecite.utas.edu.au/139816 en eng Pergamon-Elsevier Science Ltd http://dx.doi.org/10.1016/j.jtherbio.2018.12.021 Wade, NM and Clark, TD and Maynard, BT and Atherton, S and Wilkinson, RJ and Smullen, RP and Taylor, RS, Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ), Journal of Thermal Biology, 80 pp. 64-74. ISSN 0306-4565 (2019) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/30784489 http://ecite.utas.edu.au/139816 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2019 ftunivtasecite https://doi.org/10.1016/j.jtherbio.2018.12.021 2020-08-10T22:16:23Z Global seawater temperatures are increasing and becoming more variable, with consequences for all marine animals including those in food production systems. In several countries around the world, arming of Atlantic salmon ( Salmo salar ) occurs towards the upper end of the thermal tolerance window for this species, and marked effects on salmon production during summers have been experienced but never empirically investigated. This project tracked the effects of an extreme summer heatwave on two different cohorts of fish stocked into farm cages either during early winter (EW) or late winter (LW). The farm site experienced an unprecedented high water temperature event, with a peak water temperature of 22.9 C and 117 days above 18 C. Fish in both EW and LW cohorts experienced a temperature-induced cessation of voluntary feed intake as well as inefficient osmoregulatory, liver and renal function during high temperature periods. Flesh colour declined primarily in the dorsal and ventral regions of the fillet and secondarily along the midline, with over 20% of fish demonstrated a complete loss of flesh colour during the months of March and April. A return to feeding in autumn occurred faster in some fish and caused a marked bimodal size distribution to appear within both the EW and LW cohorts as autumn progressed. However, the LW cohort returned to feeding at seawater temperatures of 20.2 C, compared with 18.6 C for the EW cohort. There was a strong positive relationship between fillet colour recovery and residual condition index (RCI). These findings identified alkaline phosphatase as a potential marker to non-destructively track individual fish for signs of recovery after a thermal stress event, and shed light on the physiological consequences of marine heatwaves on fishes. This study also identified that supporting feed intake or promoting a return to feeding may help mitigate the negative impacts of climate warming on cultured Atlantic salmon. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Journal of Thermal Biology 80 64 74 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
spellingShingle |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Wade, NM Clark, TD Maynard, BT Atherton, S Wilkinson, RJ Smullen, RP Taylor, RS Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
Global seawater temperatures are increasing and becoming more variable, with consequences for all marine animals including those in food production systems. In several countries around the world, arming of Atlantic salmon ( Salmo salar ) occurs towards the upper end of the thermal tolerance window for this species, and marked effects on salmon production during summers have been experienced but never empirically investigated. This project tracked the effects of an extreme summer heatwave on two different cohorts of fish stocked into farm cages either during early winter (EW) or late winter (LW). The farm site experienced an unprecedented high water temperature event, with a peak water temperature of 22.9 C and 117 days above 18 C. Fish in both EW and LW cohorts experienced a temperature-induced cessation of voluntary feed intake as well as inefficient osmoregulatory, liver and renal function during high temperature periods. Flesh colour declined primarily in the dorsal and ventral regions of the fillet and secondarily along the midline, with over 20% of fish demonstrated a complete loss of flesh colour during the months of March and April. A return to feeding in autumn occurred faster in some fish and caused a marked bimodal size distribution to appear within both the EW and LW cohorts as autumn progressed. However, the LW cohort returned to feeding at seawater temperatures of 20.2 C, compared with 18.6 C for the EW cohort. There was a strong positive relationship between fillet colour recovery and residual condition index (RCI). These findings identified alkaline phosphatase as a potential marker to non-destructively track individual fish for signs of recovery after a thermal stress event, and shed light on the physiological consequences of marine heatwaves on fishes. This study also identified that supporting feed intake or promoting a return to feeding may help mitigate the negative impacts of climate warming on cultured Atlantic salmon. |
format |
Article in Journal/Newspaper |
author |
Wade, NM Clark, TD Maynard, BT Atherton, S Wilkinson, RJ Smullen, RP Taylor, RS |
author_facet |
Wade, NM Clark, TD Maynard, BT Atherton, S Wilkinson, RJ Smullen, RP Taylor, RS |
author_sort |
Wade, NM |
title |
Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
title_short |
Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
title_full |
Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
title_fullStr |
Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
title_full_unstemmed |
Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ) |
title_sort |
effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed atlantic salmon ( salmo salar ) |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2019 |
url |
https://doi.org/10.1016/j.jtherbio.2018.12.021 http://www.ncbi.nlm.nih.gov/pubmed/30784489 http://ecite.utas.edu.au/139816 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.1016/j.jtherbio.2018.12.021 Wade, NM and Clark, TD and Maynard, BT and Atherton, S and Wilkinson, RJ and Smullen, RP and Taylor, RS, Effects of an unprecedented summer heatwave on the growth performance, flesh colour and plasma biochemistry of marine cage-farmed Atlantic salmon ( Salmo salar ), Journal of Thermal Biology, 80 pp. 64-74. ISSN 0306-4565 (2019) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/30784489 http://ecite.utas.edu.au/139816 |
op_doi |
https://doi.org/10.1016/j.jtherbio.2018.12.021 |
container_title |
Journal of Thermal Biology |
container_volume |
80 |
container_start_page |
64 |
op_container_end_page |
74 |
_version_ |
1766361742467661824 |