Acta Ichthyologica et Piscatoria 28(1): 75-80, doi: 10.3750/AIP1998.28.1.09
Impact of high cortisol level-observed in the blood of two-year-old carp (Cyprinus carpio L.) and caused by different colour of their aquaria-on the electrolyte content and osmolarity
expand article infoM. Friedrich, K. Stepanowska
Open Access
It was determined in the present study that a 14-day stay of carp in blue, yellow, and red aquaria caused significant increase of cortisol levels compared to its initial state and to that of fish kept in aquaria of a natural colour. This in turn caused a decrease in the levels of sodium and chloride ions and statistically significant decrease in potassium ion content.