Fig. 4

Frequency distribution of G. salaris population growth rates on different salmon stocks. a Northern and Western Norwegian stocks. Solid black bars, Altaelva; open bars Imsa; grey bars Loneelva; amber bars, Namsen; red bars, Batnfjordselva. b South-eastern Norwegian salmon stocks; solid bars, Akerselva stock, open bars Lierelva stock, grey bars Numedalslågen stock. c Scottish stocks; solid bars Shin stock, open bars Conon stock. d Baltic stocks; solid bars Neva stock, open bars Indalsälv stock