Combined effects of ocean warming and acidification on the larval stages of the European abalone Haliotis tuberculata

Kavousi, J.; Roussel, S.; Martin, S.; Gaillard, F.; Badou, A.; Di Poi, C.; Huchette, S.; Dubois, P.; Auzoux-Bordenave, S.

doi:/10.1016/j.marpolbul.2021.113131

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Combined effects of ocean warming and acidification on the larval stages of the European abalone Haliotis tuberculata

Kavousi, J.; Roussel, S.; Martin, S.; Gaillard, F.; Badou, A.; Di Poi, C.; Huchette, S.; Dubois, P.; Auzoux-Bordenave, S. (2022). Combined effects of ocean warming and acidification on the larval stages of the European abalone Haliotis tuberculata. Mar. Pollut. Bull. 175: 113131. https://dx.doi.org/10.1016/j.marpolbul.2021.113131

In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363

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VLIZ: Non-open access 378103 [ request ]

Keywords

Haliotis tuberculata Linnaeus, 1758 [WoRMS]; Mollusca [WoRMS]
Marine/Coastal

Author keywords

Ocean acidification; Global warming; Climate change; Marine mollusks; Abalone larvae

Authors		Top
Kavousi, J. Roussel, S. Martin, S.	Gaillard, F. Badou, A. Di Poi, C.	Huchette, S. Dubois, P. Auzoux-Bordenave, S.

Abstract

This study examined the physiological responses of the larval stages of Haliotis tuberculata, an economically important abalone, to combined temperature (17 °C and 19 °C) and pH (ambient pH and −0.3 units, i.e., +200% increase in seawater acidity) in a full factorial experiment. Tissue organogenesis, shell formation, and shell length significantly declined due to low pH. High temperature significantly increased the proportion of fully shelled larvae at 24 h post-fertilization (hpf), but increased the proportion of unshelled larvae at 72 hpf. Percentage of swimming larvae at 24 hpf, 72 hpf and 96 hpf significantly declined due to high temperature, but not because of low pH. Larval settlement increased under high temperature, but was not affected by low pH. Despite the fact that no interaction between temperature and pH was observed, the results provide additional evidence on the sensitivity of abalone larvae to both low pH and high temperature. This may have negative consequences for the persistence of abalone populations in natural and aquaculture environments in the near future.

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