i:-^ 'rhlrli/si.rll, Ainunil Mrrlinf/ 



lime is -iOd. (Mil. 0(1(1. |)ul nioiv lliaii |(l(l.(l(l(l.(l(l(l iii;i\- he liaiidlcd 

 "n a season: and. as a mailer of fact, 1 1 •.\(l(l(l.()(l(l frv \V(>iv 

 planted one yeai-. Tlie avera.u'e eosi of llie eiitii'e opei-aiioiis is 

 less ihan one eiMii per 1.(1(1(1 Fry planled. 'Idle watei" density 

 vai'ies eonsiderahly. and exeids an inthieiiee on the work. The 

 inaxiniuni density is l.d'i:. hut sonietinies hn'.i^e quantities of 

 fresh water are diseliar^ed fi'oni tlie Baltic Sea. and the density 

 has lalleii as low as 1.011. This is fatal to the success of the 

 hatchery, as tlie e,ii-,ii-s will not float and can not he ti-otten out of 

 the spawnin,^- pond. Tlie yonno- are kept in the hatching- hoxes 

 four or li\-e days h(d'ore plaiitin,u-; hy tliat time they lia\e heconie 

 mucli stroniicr and hardit'r than when a (hiv or two old. 



(-■■i) Cajitain Dannevi.^ has estahlished the fact that indi- 

 vidual cod spawn annually. He has kept hi'ood fish in ponds 

 fivi' years, and has uotten e.uiis from them each season. The fish 

 thns kept at the station, heing fed regularly, remain in good 

 condition and their ovarian development seems to he gTeater 

 tlian in wild fish. Cajttain Dannevig says there is as much 

 ditference lietween them and wild cod as hetween a Yorkshire 

 hog and a wild hoar. Immense nuniliers of eggs have heen 

 yielded hy somt' of tlu'se domesticated cod. 



Lohstrrs. 



The Xoi'wegian lohster fishery is more important than that 

 of any other Kui-ojiean country, although the alnmdance of 

 lobsters has greatly decreased in recent years. Many years ago 

 tile hatching of lobsters was carried on at Arendal in conjiinc- 

 tioii with cod hatching. Captain Dannevig having been the 

 pioiieei- in the artificial propagation of lobsters. For a long 

 time lobster hatching has been abandoned becanse of the absence 

 of apiu'eciahle results and the general unpopularity of marine 

 culture: and only experimental work, in the line of rearing, 

 has heen cai-i'ied on. The experiments have Ixhmi in charge of 

 Dr. Ai)pellof. of the Bergen :\liiseuiii. who informed me that 

 he had got some rather ))romising results and will continue the 

 work on a larger scale. He does not attemjit to hatch the 

 lobsters, hut keeps the l)rood females in live boxes and lets them 

 hatch their own eu'u's. 'i'lie lar\ae ai'e collecleil and transferred 



