Samarin, A.M., Blecha, M., Bytyutskyy, D., Policar, T. 2015. Post-Ovulatory Oocyte Ageing in Pikeperch (Sander lucioperca L.) and its Effect on Egg Viability Rates and the Occurrence of Larval Malformations and Ploidy Anomalies. Turkish Journal of Fisheries and Aquatic Sciences, 15: 429-435. doi: 10.4194/1303-2712-v15_2_29