Alizarin mark retention in the otoliths of whitefish (Coregonus lavaretus f. lavaretus L.) from Lake Łebsko, Poland
Martyniak, Andrzej; Stańczak, Katarzyna; Kozłowski, Jacek; Mierzejewska, Katarzyna; Wziątek, Bogdan; Lejk, Adam M.; Hliwa, Piotr
During the spawning migrations of whitefish (Coregonus lavaretus f. lavaretus L. ) to Lake Łebsko in Poland during 2009 and 2010, a total of 276 individuals was caught and analysed to determine the retention time of alizarin red S (ARS) marks in their otoliths following marking in 2004 and 2005. ARS marks were visible in the otoliths of 89 specimens, with the oldest fish having an age of 5 +. Such mark retention of in excess of 5 years means that bath-marking with ARS is a valuable method for monitoring whitefish from Lake Łebsko during a current recovery programme for this endemic population.