Seasonal Variation of Acetylcholinesterase Activity as a Biomarker in Brain Tissue of Capoeta umbla in Pülümür Stream

This study was carried out between March 2015 and February 2016 with the aimof determining the seasonal variation of acetylcholinesterase (AChE) activity inbrain tissue of Capoeta umbla (Heckel, 1843) caught from Pülümür Stream(Tunceli). The seasonal fluctuations in the AChE activity of C. umbla whichcaught between the 39̊06' 19''N- 39̊36' 56''E (A) and 39̊11' 36''N-39̊41' 36''E (B)coordinates of Pülümür Stream, were studied over a period of one year. Theenzyme activity was higher in spring and summer than in autumn and winter. Inaddition, the minimum value for the AChE activity was determined in the winterseason and the maximum value was determined in the spring.