Of the 50 4th stagers, v;hich were retained in the rocvring 

 apparrtiiE, 11 individuals v/ere still alive in the fall; of these 

 eight passc-u the v/inter in the aquariura, and noiT, at the bee;inning 

 of August, - 11 znonths old - are of the follovv-in^, sizes: 28, 32, 

 33, 33, 37, 43, -iS, 47 milliraeters. 



Dcnnevi,;];, Alf 



1926b Beretning for Fl/devigens utklaelrningsrnstalt for 



1925/1926. Aarsberetning vedc iJorgos Fis'ierier 

 for 1926; h. 1, pp. 163-194 illus. 



Report for Fl/devigen hatchery for 1925/1926 



Rear ing of lobst ers 



The rearing of lobsters started July 2; on that- day 133 spavm 

 Idbsters vrera purchased froia Aaker/ifyj they vrere put into the hatch- 

 ing boxes the sane day. Fron July 3 to August 12 there v/ere gathered 

 'in all about "120,000 young 



Thereof released in sea directly due 



to lack of space " 41^000 " 



Left for rearing " '"'79,000 " 



Thereof reared to 4th stage " 5,020 " 



Released in earlier stages " 522 " 



Ae you will see the result is' a little nore than 10 per cent 

 reared - or an a.verage a little less than earlier yearso 



The cause v;as the total lack of crabs; all the time vtq had to 

 use r.ussels for food (vhen vre except sone dozens of sand crabs and 

 so:ae eggs). Mostly wn used the quite snrill mussels which grow on 

 points and rocks; these were generally fatter than the large mussels, 

 and they v;ere also more easily ground in the food mil. 



Prom previous years I know that luussels are not ideal for food, 

 but as we could not get crabs in the district Arendal - Fle]:kef jord 

 during the rearing season, I had to use v/hat could be obtained in 

 sufficient quantity and at a reasonable price, ^here were used -^boiit 

 120 liters per 24 hours of "breriskjell" (edge mussels). 



As you will remember the previous experiments v;ere conducted 

 "vrith crabs as food, but later on, as the crab has practically dis- 

 appeared, the objective of the experiments has been to find other 

 adequate foodo 



Probably the crab will again be found at islets and points in 

 S/rlandet (southern part of the country) - but it is necessary to 

 kmov/ v;hat we should use for food v/hen t'no crab is lacking; therefore 



56 



