COUNCIL — APRIL 1912 — APPENDIX F — 104 — 



total length; if possible both) of salmon and salmon trout 1 ). Distinction to be 

 made, as far as possible, between male and female. 



A model form drawn up for such statistics is appended hereto. On each 

 form should be noted the number, nature, and material of the means of capture 

 employed; (length and depth of nets, with width of meshes, size of hooks, etc.) 



Information on these points to be obtained, not only with regard to the 

 river in question and its tributaries, but also for the sea fishing ground outside 

 its mouth. Notes are moreover to be taken regarding young salmon before 

 leaving the river; such young salmon as are chiefly caught in sea waters only, and 

 full grown fish captured in the river. 



From such statistics it will be possible to obtain information not only as 

 to the relative numbers of male and female fish, weight of certain fish of a given 

 length, but also as to the times when the full grown and the young salmon 

 migrate to the sea, and the size of the fish at such time of migration. 



2) Investigations by means of marking, study of scales, etc. 2 ) 

 As to the migration of salmon to the sea, their growth and the age at 

 which young salmon leave the river for the first time, and also age at which full- 

 grown males and females become progenitive. Further, as to the lenght of time 

 between spawning periods. Some explanation as to the questions of the return 

 of the salmon to their birthplace should also be given. 



into the Baltic, the Luga, which flows into the south-eastern part of the Gulf of Finland, 

 has been proposed. As regards Finland, Dr. Sandman, the Inspector of Fisheries, has 

 suggested the Uleâ elf, which flows into the north easterly part of the Gulf of Bothnia. 

 The salmon fishing in this river is let, but belongs to the State. It will in all probability 

 be possible, when the term of the present bases expire (in 1913) to have inserted such 

 clauses as shall require the persons to whom the fishing- is let to furnish the Government 

 with detailed statistics as to the salmon fishery. — Of the Swedish rivers flowing into the 

 Baltic, and otherwise suited to the purposes of investigation, there is none in which the 

 fishing rigths are the property of the State. The river Ângermanelf, which flows out into 

 the central part of the Gulf of Bothnia, would however, appear to be the most suitable for 

 the investigations in question. 



') The word "salmon" wherever hereafter found, to include salmon trout. 



2 ) The samples of scales taken for purposes of investigation should, as far as possible, be taken 

 from a spot a little above the side line, and slightly in rear of a vertical line drawn down- 

 wards from the hindmost part of the dorsal fin. (See K. Dahl: „Alder og Vekst hos Laks 

 og 0rret" etc. Kristiania 1910. p. 6.) 



