The planktonic stages of the salmon louse (Lepeophtheirus salmonis) are tolerant of end-of-century pCO(2) concentrations

• Published in: PeerJ
• Main Authors: Thompson, Cameron R. S., Fields, David M., Bjelland, Reidun M., Chan, Vera B. S., Durif, Caroline M. F., Mount, Andrew, Runge, Jeffrey A., Shema, Steven D., Skiftesvik, Anne Berit, Browman, Howard
• Other Authors: Institute of Marine Research Bergen (IMR), University of Bergen (UiB), Bigelow Laboratory for Ocean Sciences, Austevoll Research Station (IMR), University of Bergen (UiB)-University of Bergen (UiB), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Department of Biological Sciences Clemson, Clemson University, University of Maine, Gulf of Maine Research Institute (GMRI)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2019
• Subjects: ACL; behavior; Growth; responses; Metabolism; ocean acidification; impacts; Parasite; Aquaculture; infection; respiration; calanus-finmarchicus; Copepod; Energetics; Lepeophtheirus salmonis; Lipid; Salmon lice; sea lice; threat; envir; geo; Calanus finmarchicus; Ocean acidification
• Online Access: https://doi.org/10.7717/peerj.7810; https://hal.archives-ouvertes.fr/hal-02920510/file/Thompson_etal_PeerJ_2019.pdf; https://hal.archives-ouvertes.fr/hal-02920510

WOS:000489818800005 International audience The copepod Lepeophtheirus salmonis is an obligate ectoparasite of salmonids. Salmon lice are major pests in salmon aquaculture and due to its economic impact Lepeophtheirus salmonis is one of the most well studied species of marine parasite. However, there is limited understanding of how increased concentration of pCO(2) associated with ocean acidification will impact host-parasite relationships. We investigated the effects of increased pCO(2) on growth and metabolic rates in the planktonic stages, rearing L. salmonis from eggs to 12 days post hatch copepodids under three treatment levels: Control (416 mu atm), Mid (747 mu atm), and High (942 mu atm). The pCO(2) treatment had a significant effect on oxygen consumption rate with the High treatment animals exhibiting the greatest respiration. The treatments did not have a significant effect on the other biological endpoints measured (carbon, nitrogen, lipid volume, and fatty acid content). The results indicate that L. salmonis have mechanisms to compensate for increased concentration of pCO(2) and that populations will be tolerant of projected future ocean acidification scenarios. The work reported here also describes catabolism during the lecithotrophic development of L. salmonis, information that is not currently available to parameterize models of dispersal and viability of the planktonic free-living stages.