24 



;i 



[ ;-J()0,0()0 Krriner ;i vciir. ;il aii ;iveraj,f(^ jirifc ni' 2 Krcnicr pn- lour scurc, 

 which gives only 12 inillion ))laice. 



Thew twomethodsotinvestigation: 1) the ytatisticaland 2)lluvt liy nie'uiis cil' 

 soiuing, have thus sliowu U8 th;it tlieve ure in Xissuni-l^n-ediiiug at tmsfi:. !I32 pluico 

 por Tønde I;and, in Kuas-Brediiiug at least 37;"), in ^'eno-I>llg( at Icast 2'.t7. 

 and in Thisted-Breduiiig tif tnosf 7. I inean tluit these tigures, tiiougli tliey 

 are Imt approximately oorroct (except tlu last oi' them) aftord lirmor liolds 

 lliaii \\e lise to have when we discuiss (juestions ol' lisliery, and Ijy futiu'e 

 iiivestigations Ihey caii presumably hecoine more correet. It is a i)ity ttiat these 

 oxperiments retpiire materiel (a steam-capstan) whieh Imt rarely is at the dis- 

 tiosal of the Station. 



Jt is a loug-established faet that the small plaice generally live in othcr 

 ])arts of the seas thaii the larger oiies. Every plaice-fisher knows this well 

 cnongli. It holds good in the Cattegat, it holds good in the German Sea, and 

 no donbt it will do so at all plaees wliere a genuine stock of plaice is living. 

 The later biological investigations, abroad as well as at home, have new proved 

 that this phenomenon is nof, as a rule, mving to dift'erent average sizes ol' 

 tlie various races ol plaice, hut to the faet that the young and /ro«/ fJiis rcasini 

 small fish live apart from the cider and therefore larger ones. This also 

 explains the faet, whioh has loug been known to our fishermen, that the plaice 

 in eertain parts of the Cattegat »never liave any spawn and milt«, for they 

 a,re young fisli, while in other parts they have them fully developed. viz. Avliere 

 the growu-ii]') fish live. In Aall)æk8))ugt near the Skaw spawners are vei'v rare, 

 while they are (.[uite commou in the deep eastern parts of the Cattegat, foi' 

 instance at Anholt, uay, at times we find here only large mature fish. The 

 <|uite tender l'ry of one inch or still smaller, on the other hånd, are but rarely 

 seen by the hshermen, but their dwelling-place is, as numerons investigations 

 have proved, the quite shallow, protected sands along the shore, where, in 

 early spring, tho snu can give tlie water an exceptionally high temperature. 

 From tilis laet already we can conclude that the plaice in the course of its 

 life must go from the piaces near land where it stays when it is young to 

 deepcr and deeper water. at the same time as it is growing lavger and larger. 

 This migration can, under eertain circumstances, be casily seen, and tlie correet 

 knowledge of it is of great moment with respect to the Ijimfjord. 



'i'hc Icndor Iry of the plnice, the Iry of this year as well as that ol' the 



