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Mismatch of thermal optima between performance measures, life stages and species of spiny lobster

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Twiname, S, Fitzgibbon, QP ORCID: 0000-0002-1104-3052, Hobday, AJ, Carter, CG ORCID: 0000-0001-5210-1282, Oellermann, M ORCID: 0000-0001-5392-6737 and Pecl, GT ORCID: 0000-0003-0192-4339 2020 , 'Mismatch of thermal optima between performance measures, life stages and species of spiny lobster' , Scientific Reports, vol. 10, no. 1 , pp. 1-15 , doi: 10.1038/s41598-020-78052-4.

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Abstract

In an ocean warming hotspot off south-east Australia, many species have expanded their ranges polewards, including the eastern rock lobster, Sagmariasus verreauxi. This species is likely extending its range via larval advection into Tasmanian coastal waters, which are occupied by the more commercially important southern rock lobster, Jasus edwardsii. Here, thermal tolerances of these lobster species at two life stages were investigated to assess how they may respond to warming ocean temperatures. We found that the pattern, optimum and magnitude of thermal responses differed between performance measures, life stages and species. Sagmariasus verreauxi had a warmer optimal temperature for aerobic scope and escape speed than J. edwardsii. However, J. edwardsii had a higher magnitude of escape speed, indicating higher capacity for escape performance. There were also differences between life stages within species, with the larval stage having higher variation in optimal temperatures between measures than juveniles. This inconsistency in performance optima and magnitude indicates that single performance measures at single life stages are unlikely to accurately predict whole animal performance in terms of life-time survival and fitness. However, combined results of this study suggest that with continued ocean warming, S. verreauxi is likely to continue to extend its distribution polewards and increase in abundance in Tasmania.

Item Type: Article
Authors/Creators:Twiname, S and Fitzgibbon, QP and Hobday, AJ and Carter, CG and Oellermann, M and Pecl, GT
Keywords: aerobic scope, climate change, crustaceans, escape speed, Jasus edwardsii, range shift, respiratory metabolism, Sagmariasus verreauxi
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
DOI / ID Number: 10.1038/s41598-020-78052-4
Copyright Information:

Copyright 2020 the authors. Licensed Under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

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