Anaesthesia procedure for two species of Baikal golomyankas (Cottoidei: Comephoridae)

Аннотация

This study aimed to develop the anaesthesia procedure for Comephorus baicalensis (Pallas, 1776) and Comephorus dybowski Korotneff, 1904 to eliminate stress effects during various manipulations in aquarium exposition. Clove oil preparation and lidocaine solution were tested in various concentrations as anaesthetics. The experimental studies revealed optimal lidocaine concentration of 600 mg/L for C. baicalensis and 450 mg/L for C. dybowski. The concentration of clove oil sufficient to achieve the rest phase was 150 mg/L for both species. Clove oil preparation took a faster effect on golomyankas, and the fish recovered from anaesthesia in a shorter period than after anaesthesia with lidocaine. However, the presence of the excitation phase and excessive mucus secretion with the use of clove oil preparation indicated that fish were under stress. At this stage of research, the use of lidocaine for anaesthesia of golomyankas during regular manipulations is preferable.