title: Trophic transfer of essential elements in the clownfish Amphiprion ocellaris in the context of ocean acidification.
abstract: Little information exists on the effects of ocean acidification (OA) on the digestive and post-digestive processes in marine fish. Here, we investigated OA impacts (Δ pH = 0.5) on the trophic transfer of select trace elements in the clownfish Amphiprion ocellaris using radiotracer techniques. Assimilation efficiencies of three essential elements (Co, Mn and Zn) as well as their other short-term and long-term kinetic parameters in juvenile clownfish were not affected by this experimental pH change. In complement, their stomach pH during digestion were not affected by the variation in seawater pH. Such observations suggest that OA impacts do not affect element assimilation in these fish. This apparent pCO2 tolerance may imply that clownfish have the ability to self-regulate pH shifts in their digestive tract, or that they can metabolically accommodate such shifts. Such results are important to accurately assess future OA impacts on diverse marine biota, as such impacts are highly species specific, complex, and may be modulated by species-specific metabolic processes.
authors.affiliation: International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco.|USR 3278 CNRS-EPHE-UPVD, Paris Sciences Lettres (PSL), Université de Perpignan via Domitia, Perpignan, France.
authors.forename: Hugo
authors.identifier: http://orcid.org/0000-0002-3376-8425
authors.initials: H
authors.lastname: Jacob
authors.affiliation: International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco.|Littoral Environnement et Sociétés (LIENSs), UMR 7266, CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, La Rochelle, France.
authors.forename: Simon
authors.initials: S
authors.lastname: Pouil
authors.affiliation: USR 3278 CNRS-EPHE-UPVD, Paris Sciences Lettres (PSL), Université de Perpignan via Domitia, Perpignan, France.|Laboratoire d'Excellence "CORAIL", Moorea, French Polynesia.
authors.forename: David
authors.initials: D
authors.lastname: Lecchini
authors.affiliation: International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco.
authors.forename: François
authors.initials: F
authors.lastname: Oberhänsli
authors.affiliation: International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco.
authors.forename: Peter
authors.initials: P
authors.lastname: Swarzenski
authors.affiliation: International Atomic Energy Agency, Environment Laboratories, 4a, Quai Antoine 1er, Principality of Monaco, Monaco.
authors.forename: Marc
authors.initials: M
authors.lastname: Metian
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000378:metabolism; D003035:Cobalt / Q000737:chemistry / Q000378:metabolism; D004435:Eating / Q000502:physiology; D005753:Gastric Mucosa / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008274:Magnesium / Q000737:chemistry / Q000378:metabolism; D008345:Manganese / Q000737:chemistry / Q000378:metabolism; D009792:Oceans and Seas; D010473:Perciformes / Q000378:metabolism*; D011868:Radioisotopes / Q000737:chemistry / Q000378:metabolism; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry / Q000378:metabolism
chemical_list: D011868:Radioisotopes; D014867:Water; D002245:Carbon Dioxide; D003035:Cobalt; D008345:Manganese; D008274:Magnesium; D015032:Zinc