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Mar Environ Res. 2019 Jan;143:111-123. doi: 10.1016/j.marenvres.2018.10.002. Epub 2018 Oct 9.

Energy metabolism and survival of the juvenile recruits of the American lobster (Homarus americanus) exposed to a gradient of elevated seawater pCO2.

Author information

1
Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.
2
Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada; Institut des Sciences de la Mer, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC, G5L 3A1, Canada.
3
Homarus Inc, 408 Rue Main, Shediac, NB, E4P 2G1, Canada; EcoNov Inc, 540 Ch. Gorge Road, Moncton, NB, E1G 3H8, Canada.
4
Fisheries and Oceans Canada, Saint Andrews Biological Station, 125 Marine Science Dr, Saint Andrews, NB, E5B 0E4, Canada; Fisheries and Oceans Canada, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, NS, B2Y 4A2, Canada.
5
Fisheries and Oceans Canada, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, NS, B2Y 4A2, Canada.
6
Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada. Electronic address: piero_calosi@uqar.ca.

Abstract

The transition from the last pelagic larval stage to the first benthic juvenile stage in the complex life cycle of marine invertebrates, such as the American lobster Homarus americanus, a species of high economic importance, represents a delicate phase in these species development. Under future elevated pCO2 conditions, ocean acidification and other elevated pCO2 events can negatively affect crustaceans. This said their effects on the benthic settlement phase are virtually unknown. This study aimed to identify the effects of elevated seawater pCO2 on stage V American lobsters exposed to seven pCO2 levels. The survival, development time, metabolic and feeding rates, carapace composition, and energy metabolism enzyme function were investigated. Results suggested an increase in mortality, slower development and an increase in aerobic capacity with increasing pCO2. Our study points to potential reduction in juvenile recruitment success as seawater pCO2 increases, thus foreshadowing important socio-economic repercussions for the lobster fisheries and industry.

KEYWORDS:

CO(2) leakages; Carbon capture and storage; Crustacean; Energy metabolism; Fisheries; Metabolic rate; Mineralisation; Mitochondria; Moult; Ocean acidification

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