The Effect of Simulated Marine Heatwaves on Green-Lipped Mussels, Perna canaliculus: A Near-Natural Experimental Approach

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aut.relation.articlenumber103702
aut.relation.journalJournal of Thermal Biology
aut.relation.startpage103702
aut.relation.volume117
dc.contributor.authorVenter, L
dc.contributor.authorAlfaro, AC
dc.contributor.authorRagg, NLC
dc.contributor.authorDelorme, NJ
dc.contributor.authorEricson, JA
dc.date.accessioned2023-10-08T23:18:20Z
dc.date.available2023-10-08T23:18:20Z
dc.date.issued2023-09-04
dc.description.abstractMarine heatwaves (MHW) are projected for the foreseeable future, affecting aquaculture species, such as the New Zealand green-lipped mussel (Perna canaliculus). Thermal stress alters mussel physiology highlighting the adaptive capacity that allows survival in the face of heatwaves. Within this study, adult mussels were subjected to three different seawater temperature regimes: 1) low (sustained 18 °C), 2) medium MHW (18–24 °C, using a +1 °C per week ramp) and 3) high MHW (18–24 °C, using a +2 °C per week ramp). Sampling was performed over 11 weeks to establish the effects of temperature on P. canaliculus survival, condition, specific immune response parameters, and the haemolymph metabolome. A transient 25.5–26.5 °C exposure resulted in 61 % mortality, with surviving animals showing a metabolic adjustment within aerobic energy production, enabling the activation of molecular defence mechanisms. Utilisation of immune functions were seen within the cytology results where temperature stress affected the percentage of superoxide-positive haemocytes and haemocyte counts. From the metabolomics results an increase in antioxidant metabolites were seen in the high MHW survivors, possibly to counteract molecular damage. In the high MHW exposure group, mussels utilised anaerobic metabolism in conjunction with aerobic metabolism to produce energy, to uphold biological functions and survival. The effect of exposure time was mainly seen on very long-, and long chain fatty acids, with increases observed at weeks seven and eight. These changes were likely due to the membrane storage functions of fatty acids, with decreases at week eleven attributed to energy metabolism functions. This study supports the use of integrated analytical tools to investigate the response of marine organisms to heatwaves. Indeed, specific metabolic pathways and cellular markers are now highlighted for future investigations aimed at targeted measures. This research contributes to a larger program aimed to identify resilient mussel traits and support aquaculture management.
dc.identifier.citationJournal of Thermal Biology, ISSN: 0306-4565 (Print); 1879-0992 (Online), Elsevier BV, 117, 103702-. doi: 10.1016/j.jtherbio.2023.103702
dc.identifier.doi10.1016/j.jtherbio.2023.103702
dc.identifier.issn0306-4565
dc.identifier.issn1879-0992
dc.identifier.urihttp://hdl.handle.net/10292/16758
dc.languageeng
dc.publisherElsevier BV
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0306456523002437
dc.rights.accessrightsOpenAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectAquaculture
dc.subjectCytology
dc.subjectMarine heatwave
dc.subjectMetabolomics
dc.subjectPerna canaliculus
dc.subjectTemperature
dc.subject3109 Zoology
dc.subject31 Biological Sciences
dc.subject14 Life Below Water
dc.subject06 Biological Sciences
dc.subjectPhysiology
dc.subject3109 Zoology
dc.titleThe Effect of Simulated Marine Heatwaves on Green-Lipped Mussels, Perna canaliculus: A Near-Natural Experimental Approach
dc.typeJournal Article
pubs.elements-id524753
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