TY - GEN TY - GEN T1 - Variation in the relative year-class strength of pikeperch, Stizostedion lucioperca (L.), in two Finnish lakes at different latitudes JF - Annales zoologici Fennici VO - 33 IS - 3 SP - 437 OP - 442 A1 - Karjalainen, Juha A2 - Lehtonen, Hannu A2 - Turunen, Timo LA - eng YR - 1996 UL - https://kansalliskirjasto.finna.fi/Record/arto.012344272 ER -