On July 10 n total of 307 si^civm lobsters wc\s purchnsed from the 

 storoho^^ses at Agerjz^en, and these r;ere immedir.tely pln.ced in the 

 rearing boxes a Becriuso of the lavr sen teinperatiure, the lobster 

 hatched slovj-lyj not until July 20 did the young reach a number of 

 500 per day; on August 16, the daily number of young ivns again below 

 this figure. 



There vrere gathered about 83,000 young of ^irhich about 3,000 

 were released in the sea imiaediately due to lack of space; the 

 rest was used for the rearing experiments • Of these 13,086 vrere 

 roared to the 4th stage, 50 were kept for further rearing, 20 were 

 preserved, while the rest was liberated at or near Fljz(devigen» 



Yflien the work stopped, the rest of the lobsters in 2d and 3d 

 stages, 2243, vrere released in the sea, also at Fl/devigen, 



Because of the relatively large number of spavm lobsters, and 

 in order to save v;ater, tvro individuals were placed in each hatching 

 box; this did not prove profitoble, however, as the sprvm fell off 

 the lobster; there was a considerable quantity of dead spawn in the 

 boxes* 



With regard to the result of the year's work, this is not as 

 good as earlier; the number of reared lobsters is less than that of 

 preceding x-'ears; the. reason is that vie could not obtain crabs for 

 food for the young; I did not get the first shipment of crabs from 

 Kristiansand until August 16. Up to that time I had to try mother 

 kind of food - mostly we had to use mussels. I knev/ from earlier 

 experiments that they were not ideal food, but notlilng else could 

 be obtained. The result v;as therefore not very good until v/e got 

 crabs; then things went better again. 



The development of the different experiments v/ill be seen from 

 the folloiTing. survey: 



Experiment: In: Brood: Out: 4th stagers; 



(See Table p. 130) 



You will see that the later experiments in wliich a crab diet v;as 

 used, have given a much 1:etter result than the earlier, in which 

 mussels v/ere especially used for food. That mussels are not very 

 well fitted for food, is probably due to the physical nrture of the 

 meats They will not keep floating in the water as long as the crab 

 food does. 



55 



