234 KNUT DAHL. 



mongers f. ex. M. Thams & Co. During these investigations, 

 when I had the opportunity of examining thousands of fishes, 

 I could not find one single salmon smaller than 50 cm. long. 

 All the smaller fishes were throut. 



By courtesy of the managers of this large buissiness I was 

 permitted to store a large vessel with preserving liquid in the 

 establishment. The clerks then undertook for me to preserve 

 the smallest specimen of salmon, which could be found during 

 the season. The result was a salmon 49 cm. long. 



The results of my researches during the first season was 

 shortly this: 



I could ascertain the presence of trout in all stages in 

 the waters examined. Salmon however could not he found of 

 sizes between 13 cm. (as an exception 16 cm.) and 45—50 cm. 

 in length. 



The correctness of this result I have during the latter years 

 tried to centrol by all means available to me. 



The year 1899 was spent in repeating the investigations of 

 1898 with perfectly similar results. During the same year I 

 visited the main fishmarkets of England, Scotland and Denmark 

 endeaevouring in these countries to find salmon of small size. 

 The results of the examination of large stores of fish was per- 

 fectly like those obtained in this country. 



A few fishing experiments, undertaken from the Danish 

 Biol. Station in the sourroundings of Fyen, only yielded trout 

 of the same appearance as those obtained here in Norway. 



In 1900 large fishing experiments with eelhandseines and 

 other seines were effected in the Trondhjemfiord. As regards 

 the fiord, the hauls yielded large quantities of trout, no salmon. 

 In the rivers I obtained the same result as in previous years. 



Different localities in the Battenfiord were also this year 

 examined with the same result as all my previous investiga- 

 tions. 



