The planktonic stages of the salmon louse (Lepeophtheirus salmonis) are tolerant of end-of-century pCO2 concentrations

PeerJ

Anne Berit Skiftesvik¹  Howard I. Browman¹  Steven D. Shema¹  Reidun M. Bjelland¹  Caroline M.F. Durif¹  David M. Fields²  Andrew Mount³  Cameron R.S. Thompson⁴  Vera B.S. Chan⁵  Jeffrey A. Runge⁶ 

[1] Austevoll Research Station, Institute of Marine Research, Storebø, Norway;Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States of America;Department of Biological Sciences, Clemson University, Clemson, SC, United States of America;Institute of Marine Research, Bergen, Norway;LEMAR, Institut Français de Recherche pour l’Exploitation de la Mer, UMR 6539 (UBO/CNRS/IRD/Ifremer), Plouzané, France;School of Marine Sciences, University of Maine, Orono, ME, United States of America;

关键词: Salmon lice;    Copepod;    Ocean acidification;    Parasite;    Energetics;    Metabolism;   

DOI  :  10.7717/peerj.7810

来源: DOAJ

【 摘 要 】

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 pCO2 associated with ocean acidification will impact host-parasite relationships. We investigated the effects of increased pCO2 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 µatm), Mid (747 µatm), and High (942 µatm). The pCO2 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 pCO2and 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.

【 授权许可】

Unknown