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Thermal sensitivity links to cellular cardiac decline in three spiny lobsters

Citation

Oellermann, M and Hickey, AJR and Fitzgibbon, QP and Smith, G, Thermal sensitivity links to cellular cardiac decline in three spiny lobsters, Scientific Reports, 10, (1) Article 202. ISSN 2045-2322 (2020) [Refereed Article]


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Copyright Statement

The Author(s) 2020. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/s41598-019-56794-0

Abstract

Understanding mechanisms of thermal sensitivity is key to predict responses of marine organisms to changing temperatures. Sustaining heart function is critical for complex organisms to oxygenate tissues, particularly under temperature stress. Yet, specific mechanisms that define thermal sensitivity of cardiac function remain unclear. Here we investigated whole animal metabolism, cardiac performance and mitochondrial function in response to elevated temperatures for temperate, subtropical and tropical spiny lobster species. While oxygen demands increased with rising temperatures, heart function became limited or declined in all three species of lobsters. The decline in cardiac performance coincided with decreases in mitochondrial efficiency through increasing mitochondrial proton leakage, which predicts impaired compensation of ATP production. Species differences were marked by shifts in mitochondrial function, with the least thermal scope apparent for tropical lobsters. We conclude that acute temperature stress of spiny lobsters, irrespective of their climatic origin, is marked by declining cellular energetic function of the heart, contributing to an increasing loss of whole animal performance. Better understanding of physiological thermal stress cascades will help to improve forecasts of how changing environmental temperatures affect the fitness of these ecologically and commercially important species.

Item Details

Item Type:Refereed Article
Keywords:lobster, thermal tolerance, cardiac performance, Jasus edwardsii, Sagmariasus verreaux, Panulirus ornatus
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:Aquaculture Rock Lobster
UTAS Author:Oellermann, M (Dr Michael Oellermann)
UTAS Author:Fitzgibbon, QP (Dr Quinn Fitzgibbon)
UTAS Author:Smith, G (Professor Gregory Smith)
ID Code:137520
Year Published:2020
Funding Support:Australian Research Council (IH120100032)
Deposited By:Fisheries and Aquaculture
Deposited On:2020-02-19
Last Modified:2020-03-23
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