Dannevig, Alf 



1936a Bgretning for Fl/devigens utklekningsnnstalt ' 1 juli 



1932 - 30 juni 1933. Aarsberetning ved. IJorgcs 



Piskeries 1933 (1936) iir, 1, pp. 58-60. 



• Report for Fl/devigen hatchery July 1, 1932 - June 30, 1933 



Rearing of lobster^ 



During t he spring of 1932 v/e finished our new rearing apparatus 

 for lobsters and the experiraents started in the irionth of July. The 

 sup^ily of ovigerous lobsters vms very scarce; by July 2 i/e had only 

 215 lobsters in spite of our inquiries at all lobster store houses 

 betv/een Farsund 'and AakerBy. The lobsters had very little spavm 

 that year. On August 2 we got 25 more lobsters with a few eggs 

 ready for hatching. The eggs are easily scratched off the lobster 

 when it is kept in confinement, 



Betvreeh July 13 and August 15 about 70,000 young lobsters wore 

 gathered. Of this quantity about 20,500 were reared to the "bottom" 

 stage. These Virere liberated near the hatchery. 



Because of the lack of help the nev/ly hatched young v/ere not 

 fully counted, so that the total percentage of reared lobsters can- 

 not be given, but some control experiments gave betv/een 21 and 31 

 per cent in the "bottom" stage. 



The new hatchery (apparatus) funct'.oned very satisfactorily. 



Dannevig, Alf 



1936b Hummer og Hummer leu It ur. Fiskeridirekboratets Slcrifber, 



Serie Havunders/kelser (Rcpt, NonTegian Fishery and Ilarine 



Investigations) volo 4, noo 12, 60 p., illus. 



Lobster and lobster culture 

 Chapter "Previous Investigations", p. 19, at the bottom 



In the late eighties my father performed considerable vrork to 

 solve the questions concerning the hatching and rearing of lobster 

 young. (G .M. Dannevig: Repor t on the V/ork at the Hatcliery for Sen - 

 water Fish, Arendal 1885. And Amiuallfeport for 1892 for th e 

 A rondal's and Vicinity's Branch of th e Association for Fr oino t i o n 

 of the Horv:egian Fi sher iesT^ In 188"3 he succeeded in hatching 

 spavvTi which he had taken from the mother lobster - and he proved 

 in this V\ray that there is no physiological connection betvreen the 

 eggs av:d the mother. During his v/ork v/ith the rearing of tlie 

 young he made clear by ;p.eans of experiments some of the necessities 

 of the young lobsters if they shall thrive. He shovfed for instance 



86 



