LIST OF ILLUSTRATIONS xi 



FIG. Fl^C^ P'^S^ 



39. Scale of a very small Norwegian Sea-trout - - - - \2'^ 



40. Scale of a small Norwegian Sea-trout 123 



41. Scale of Sea-trout indicating that the fish spawned as a whitling - 126 



42. Scale of Sea-trout indicating that the fish had spawned as a whitling i 26 



43. Scale of Sea-trout indicating that the fish had spawned as a whitling 130 



44. Scale of Sea-trout indicating that the iish had not spawned as a 



whitling 130 



45. Scale of Sea-trout indicating that the fish did not remain over 



winter in the sea after its descent as a smolt - - - -138 



46. Scale of Sea-trout indicating that the fish passed i winter in the sea 



after its descent as a smolt 138 



47. Scale of Sea-trout indicating that the fish passed 2 winters in the 



sea after its descent as a smolt 142 



48. Scale of Sea-trout indicating that the fish passed 3 winters in the 



sea after its descent as a smolt - - - - - - - 142 



49. Scale of Sea-trout which, although 1 1 \'ears old, weighed only 2\ lb. 143 



50. A Salmon leaping at a fall 152 



51. A male Salmon in spawning dress 160 



52. A female and male Salmon on the eve of spawning - - - 160 



53. A male Sea-trout in spawning dress 164 



54. A female kelt Sea-trout 164 



55. Scale of Sea-trout indicating spawning in 2 consecutive years - 168 

 36. Scale of Sea-trout indicating spawning in 3 consecutive years - 168 



57. Scale of Sea-trout indicating spawning in 4 consecutive years - 170 



58. Scale of Sea-trout indic£iting spawning in 5 consecutive years - 172 



59. Scale of Norwegian Sea-trout indicating spawning in 7 consecutive 



years 174 



60. A Norwegian Sea-trout (ii^lb.) 174 



61. Scale of Sea-trout, recaptured when spawning in 3 consecutive years 176 



62. Scale of Sea-trout indicating that the fish spent 3 consecutive years 



in the sea after migration as a smolt 176 



Plan of Luss Hatchery - 181 



