Salmonidas of Norway. 73 



experiments and systems have not yet been conducted 

 upon so large a scale as to render it absolutely safe to 

 accept the results of his labours as facts in the general 

 natural history of the Salmo salar of Norway. 



As an individual, I am prepared to accept the result 

 of their experiments as conclusive evidence upon many 

 points ; and persons more difficult to convince must admit 

 that the many straws they have tracked at least 

 tend to show the direction in which the wind blows. 

 Herr Landmark's experiments in marking salmon have 

 proved that, as a general rule, fish return to spawn in 

 the river of their birth. Of 56 fish marked in a certain 

 river, 34 were recaught in it, 1 in a different river, and 

 22 by nets at distances varying from half a mile to 

 200 miles from where marked.* 



Herr Landmark points out that Salmo salar while 

 at sea travels with the current, and as this sets north- 

 wards during summer along the western coast of Norway, 

 it follows that the more northern rivers benefit by those 

 southern-bred fish which get somewhat beyond their 

 reckoning in search of food, and of others which prefer 

 to strike another river rather than await with great 

 inconvenience to themselves a rise in the temperature of 

 their native stream. 



• Vide Annual Eeport of the Fishery Board for Scotland for 1892, 

 Part IT., note 11. 



