Fig. 5.
(A) No significant changes in drinking rate were measured in fish treated with fluoxetine. (B) The ratio of intestinal fluid PEG: seawater PEG concentration was significantly elevated, suggesting an increased intestinal fluid absorption, in fish treated with 25 μg g−1 fluoxetine compared to controls and 50 μg g−1-treated fish. The opposite effect was measured in fish treated with 50 μg g−1 fluoxetine, indicating a reduced fluid absorption at the level of the intestine. *P < 0.05 denotes a significant difference compared to control, tP < 0.05 denotes a significant difference compared to 50 μg g−1.