XXVI.-THE PROPAGATION AND GROWTH OF THE HERRING 

 AND SMALL-HERRING, WITH SPECIAL REGARD TO THE COAST 

 OF BOHUSLAN. 



BY A. V. Ljungman.* 

 [Translated from the STredish. by Herman Jacobson. 



Tlie great importance of the herring-fislieries to the Scandinavian 

 countries has led to scientific investigations for the purpose of gaining 

 increased knowledge of all those conditions on which the proper man- 

 agement and administration of these fisheries depend, and with a view 

 of making them as productive as possible. The principal results of 

 these investigations which have been carried on in Norway and Den- 

 mark have been given from time to time iu the " Tidsshrift, for FisTierV 

 and the ^'•J^ordish Tidsshrift for FisTcerV; and the author of this little 

 treatise hopes to give an account of the Swedish investigations as they 

 are gradually progressing. As such a work may be considerably fur- 

 thered by observations furnished by those specially interested in the 

 fisheries, who have special opportunities for observing, I have deter- 

 mined to follow the example of two former contributors to this journal, 

 Axel Boeck and G. Winther, and to work ui) historically and system- 

 atically those portions of the various sciences having a bearing on the 

 subject towards which important contributions may be expected from a 

 large class of people outside of scientific circles, and whose more gen- 

 eral knowledge may be of importance for our fisheries. In order to 

 enlighten and benefit this class of people, as well as to derive the fullest 

 possible benefit of their co-operation, it is important that by a short and 

 clear r6sum6 of what has been done hitherto, they should be enabled to 

 gain an insight into the condition of our fisheries. 



Among the i^hases in the life of our salt-water fish whose knowledge 

 may be considerably increased by observations and contributions by 

 the common people, the visible 'phenomena accompanying the propagation 

 and groicth of the herring occupy an important place. And with the 

 view of throwing more light on this subject, I wrote this treatise four 

 years ago, and have now reproduced it, embodying all the results of 

 recent investigations, especially those of the German Fish Commission.^ 



* Om sillens och skarpHiUens fortplantvhig och tillvaxt, med se^sldld hdnsyn till Bohualdns 

 sMrgard. Af A. V. Ljtjngman. — [From "Nordisk Tidsskiift for Fiskeri," 5th year, 

 part 4, Copenhageu, 1879.] 



' Jaki-esbericht del- Commiasion zur vAssenscliaftUchen Untersuchung der deutschen Meere in 

 Kid, iv-vi. Berlin, 1878. 



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