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Effects of High Environmental CO 2 Levels on Atlantic Salmon Post‐Smolts
Author(s) -
Gharbi Naouel,
Mota Vasco,
Terjesen Bendik Fyhn,
Kolarevic Jelena,
Ytteborg Elisabeth,
Ebbesson L.O.E,
Handeland Sigurd O,
Nilsen Tom Ole
Publication year - 2019
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.2019.33.1_supplement.544.22
Subject(s) - zoology , smoltification , biology , seawater , fish <actinopterygii> , chemistry , aquaculture , fishery , ecology , salmonidae , salmo
Atlantic salmon has demonstrated the capacity to physiologically acclimate when exposed to increased pCO 2 levels in aquaculture flow‐through systems. Less is known about tolerance to increased pCO2 in Recirculation Aquaculture System (RAS). In the present study, Atlantic salmon post‐smolt in a RAS were kept at 12 ppt (12°C) and exposed to six different pCO 2 levels ranging from <5 mg/L ( P CO2 <1.83 mm Hg), 12 mg/L ( P CO2 =4.40 mm Hg), 19 mg/L ( P CO2 =6.94 mm Hg), 26 mg/L ( P CO2 =9.50 mm Hg), 33 mg/L ( P CO2 =12.06 mm Hg) and 40 mg/L ( P CO2 =14.61 mm Hg). After 12 week treatments fish were transferred to full strength seawater with the lowest tested pCO 2 level. We found that post‐smolts demonstrated a classic transient physiological compensatory response to cope with elevated pCO 2 , despite a clear and persistent decrease in growth rate when reared above 19 mg/L CO 2 . After twelve weeks of variable pCO 2 exposures post‐smolt were challenged with rapid changes from high (40 mg/L) to low (5 mg/L) pCO 2 levels and vice‐versa. Here we also will present physiological compensatory responses 1 and 24 hours and up to 6 days following rapid changes in pCO 2 exposure. Support or Funding Information Center for Research Based Innovation, “CtrlAqua” Project Number 237856/030 This abstract is from the Experimental Biology 2019 Meeting. There is no full text article associated with this abstract published in The FASEB Journal .