J'ivfare and Sumnmry. 5 a 



third 19-20 cm; at the fourth 23—24 cm; at the fifth 26—27 cm; at 

 tlie sixtli 30 — 33 cm. The average anniial growtb in length varies in 

 tlie first six 3"ears from 3 — 5 cm, and in larger in tlie first hvo years than 

 in the foUowing, and is largest in the third. — p. 23 f. 



8. The medinm .size of the Plaico and the avprage amiual gnnvtli 

 ar.- in cur region decidedly less than in tlic nnrlli jiai-t of tlio Nortli Sea, 

 tht* Skagerak, and the Kattegat, — p. 30. 



9. The German sailing - Ijoats, wliich hring tlirir fish l'nr tlic 

 III »st part living to the market, cateh i'laiec nl' [Vinii LS ein (tlie (Termaii 

 iiiinimr..u sizc) to abont 48 cm in length.*) 



The most have a length of 23 —27 cm, and a weight of about 

 115—200 gm. - p. 79; 83. 



The steamers land iced Piaice from 18cm to abovit 70cm, the most of these 

 from 23 — 30 cm in length and abont 115—270 gm in weight. — p. 79 — 81. 



The German sailing-boats and German steamers land out of the North 

 Sea mnch abont the same qnantity of Piaice, namely in the last few years 

 eacli abont l'^ — P'. million Kilo. — j). 61. 



lU. In Geestemünde gootl statistics of the- <piantity caught and bi'oiight 

 to the market have been kept since 1893. From these it appears that 

 tiic quantities of the large Piaice canglit In- the German steamers 

 in the sonthern part of the North Sea, and bronght by them to the market, 

 pntting natural variations out of the qnestion, absolutely as well as relatively 

 in comi»arison with the amonnt of small Piaice, have cousiderably decreased, 

 from abont 30";',, to 10 — 12 "„ in the total weight.- — p. 63. It is pr<ibabli' 

 that tili- fishing of the large Piaice is declining also für the 

 sailing-boats. — p. 71; 72. 



The relative decrease of tlie large Piaice juust be attribnted to the 

 increase of fishing. — p. 62 — 72. 



11. Tliei'e is some probaliility tliat the total weight of the l'laice 

 bronght to market by tli.e steamers i-clati\-e, to the extent of the fisliing 

 (per dii'iii), pntting natural variations ont of the quostiou, has somew liat 

 decreasi.'d on the whole. Till now, however, there is no eertain proof 

 of this. — p. 65—70. 



On the other band since tbe beginning of accurate Statistical 

 i'eports concerning our fisheries a periodical increase and decrea.se of tlie 

 ijuantity of j)laice landecl seems to be evident, for instance, a decline from 

 1893 — 1898, then an increase tili 1902, and again a decrease tili 1905. — 

 p. 67, Tab. XII; p. 69, Fig. 7. 



*) Measured from the point of the head to. Uie tip ol' the t:ül. 



