338 KNUT DAHL. STUDY ON TROUT AND YOUNG SALMON. 



Contents. 



Introduction T 221 



Chapter L Methods and implements of the investigations 226 



— IL The investigations 229 



a) Seines 229 



b) Finemeshed bag nets 236 



c) Fishermens catches ... 237 



d) Rearing-experiments and investigations on the sy- 

 stematism of the salmon 238 



e) Description of emigrating young salmon and trout . 



f) Description of young salmon in the oceanic stage 

 compared with trout of the same size 



g) Capture of young salmon in the sea 



h) Summary of the results of the investigations . . . 274 



— III. On migration and growth of young salmon 273 



— IV. On the growth and migration of the trout 284 



— V. Practical conclusions 298 



a) Protection of young fish in general 298 



b) Protection of young salmon 299 



c) Protection of young trout 305 



d) The mesh 311 



e) Annual and weekly close-times 322 



f) Change of system 323 



g) Recapitulation of propositions 335 



Appendix. 



7 tables. 

 3 plates. 



Trykt 15. December 190-t. 



