We hypothesized that the skin acts as an extrabranchial route for ammonia excretion in adult rainbow trout (Oncorhynchus mykiss) following high environmental ammonia (HEA) exposure. Trunks of control or HEA-exposed trout were perfused with saline containing 0 or 1 mmol l−1 NH4+. Cutaneous ammonia excretion rates increased 2.5-fold following HEA exposure, however there was no difference in rates between trunks perfused with 0 or 1 mmol l−1 NH4+. The skin is therefore capable of excreting its own ammonia load, but it does not clear circulating ammonia from the plasma.
|Number of pages||6|
|Journal||Journal of Fish Biology|
|Publication status||Published - Oct. 2021|
- cutaneous excretion
- divided chamber
- high environmental ammonia (HEA)
- perfused trunk