Premium
The use of a perfused, whole‐body preparation to measure the branchial and intestinal influx of 137‐caesium in the rainbow trout ( Oncorhynchus mykiss )
Author(s) -
Morgan I. J.,
Tytler P.,
Bell M. V.
Publication year - 1994
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1994.tb01304.x
Subject(s) - rainbow trout , biology , caesium , zoology , anatomy , fish <actinopterygii> , fishery , chemistry , organic chemistry
The branchial and intestinal influx of caesium (Cs) in the rainbow trout ( Oncorhynchus mykiss ) were measured using a perfused whole‐body preparation. The branchial influx of Cs was small, 0–31 μmoles kg −1 h −1 at an external concentration of 1 mm. Branchial Cs influx was saturable, with a K m of 1–92 mm and a J max of l.05μmoles kg −1 h −1 . Intestinal Cs influx was not saturable, but was directly proportional to the mucosal Cs concentration. Intestinal Cs influx was approximately 10–40 times greater than branchial Cs influx over a wide range of external Cs concentrations. These results are discussed with respect to mechanisms of Cs uptake and to the relative accumulation of radiocaesium from water and food in the environment.