Dc.nnevig, Alf 



192'1 Fl/devip;ens utklaeloiingsanstnlt • Aarsberetning ved» 



.Gorges Fiskerier for 1924, h, 1, pp« 173-195, illus. 



Fl/devigen hatchery 



R ear inn; of lobster younp; 



For the fiscal yerr 1923-24 c sum of 2,000 la-oner vras granted 

 for nev;-.rearing apparatus j as I already previously hrd planned the 

 building of these, I finished then by thq middle of July v/hen the 

 v/ork started. Originally I had counted on five nei,-.'- apparatus, but 

 by increasing then so:aewhat in size and because s one changes were 

 nade, they becarp laore expensive than calculated, so that I could 

 not get more than threeo These Mere built according to the sane 

 principle as the apparatus "ivhich had been used TJ"ith success the pre- 

 ceding year (model 1922)., l)ut v/ith different changes in order to get 

 some nevj- experience* .^ , 



On July 9, a total of 255 lobsters v/as p\ir chased from Aager/ya 

 at Lillesandj they vrere irmiediately placed in the hatching boxes 

 T.rhere the spavm lobster lives in a snail room in order to hatch its 

 eggs. -By the steady water c\irrent the young ere led dovm in strainer 

 boxes fron ivhich they are taken out every morning and transferred to 

 tho rearing boxes o 



On July 16, the rearing work vras started; up to that tine the 

 young had stayed in the strainer boxes. At the beginning vre had, 

 however, great difficulties to fight; the supply of water ws not 

 satisfactory and by the tine I could get the necessary xnr.terial fron 

 Oslo to change the water hose,, a great deal of young had been lost* 



On July 27 the t/ater hoses were changed and from nor/ on they 

 worked without accidents. The result is seen fron the follov.dng 

 data: ... 



Apparatus lTo» 1 



Of the tliree new apparatus -.Ho, 1, which wr.S: an exact copy of the 

 one used the preceding year, gave good results in accordance with the 

 ,.results in 1922© The first experiment suffered a good deal from the 

 nentioned fault in the water supply. 



Experiment !• 



July 16 to 22: In abt, 15,000 brood 



Aug« 4 to 18: Released 1,202 4th stage 



Aug, 18 Transferred to apparatus 4 84 3d " 



52 



