Arsenobetaine in Atlantic salmon (Salmo salar L.): influence of seawater adaptation.
Glycine betaine has been suggested to improve the maintenance of ionic and osmotic homeostasis during seawater adaptation in teleost fish. Arsenobetaine may also behave as an osmolyte, due to its structural similarity to glycine betaine. The influence of seawater adaptation on intestinal uptake and muscle accumulation of arsenobetaine in the teleost Atlantic salmon (Salmo salar L.) was investigated. Atlantic salmon (freshwater and seawater adapted) were given a single oral dose of arsenobetaine, which was absorbed over the intestine within 6 h after exposure. Seawater adapted Atlantic salmon had significantly higher levels of accumulated arsenobetaine in blood compared to the freshwater adapted salmon. However, seawater adaptation had no effect on the levels of accumulated arsenobetaine in muscle tissue. Similar retention of the administered dose was found in muscle tissue in both freshwater and seawater adapted salmon, with 49+/-6% and 50+/-10% retention after 144 h, respectively. Results indicate that muscle retention was not influenced by salinity in seawater adapting teleosts.
Amlund
Heidi
H
National Institute of Nutrition and Seafood Research, Safe Seafood, P.O. Box 176 Sentrum, 5804 Bergen, Norway. heidi.amlund@nifes.no
Berntssen
Marc H G
MH
D000222:Adaptation, Physiological; D000284:Administration, Oral; D000818:Animals; D001151:Arsenic / Q000032:analysis; D001152:Arsenicals / Q000008:administration & dosage / Q000493:pharmacokinetics*; D001267:Atlantic Ocean; D005618:Fresh Water; D007413:Intestinal Mucosa / Q000378:metabolism; D007422:Intestines / Q000737:chemistry; D018482:Muscle, Skeletal / Q000737:chemistry / Q000378:metabolism; D020317:Salmo salar / Q000378:metabolism*; D012623:Seawater; D012965:Sodium Chloride / Q000494:pharmacology
D001152:Arsenicals; D012965:Sodium Chloride; D001151:Arsenic; C038992:arsenobetaine