Preface and Suramary. 7 a 



0,02"/,, in weight, — to the sailing -lioats 0,14"/,, in number, and 

 0,06 "/„ in weio-ht. — p. 77—86. 



15. The miniinnm size of 18 cm has been adopted in Germany, is sfcrictly 

 kept to by the fishermen and has not given rise to any complaint. — p. 86. 



16. Biologically the effect of the different minininm lengths can, 

 to a certain extent, onlj- be ascertained through the analysis of the hanls 

 themselves from the different fishing gronnds. At a minimum length of 

 18 cm, nearly 50 — 90"/,, of the Phiice canglit on the yonng-fish gronnds 

 (at a depth of 20 m) in siimmer are even no-w not made nse of in Germany. 

 At a minimum length of 22 cm, 70 — 100 "'„ wonkl be preserved on the 

 yonng-fish gronnds in snmmer. 



On the deeper fishing gronnds these numbers sink to — 30"/„ of the 

 entire prodnct with an 18 cm minimum length; and to about 20 -40"/„ 

 with a minimum length of 22 cm. — p. 86; 88. 



17. The introduction of a minimum length of 28 cm, or even of 

 25 cm (rather similar tu thr present existing Dani.sh minimum length of 

 25,6 cm) in the southern j)art of the Xorth Sea would mean such a loss 

 to the German Piaice Fishery, that it could with difficulty be compensated 

 for even b}" considerably higher prices aiid would be for tlio German 

 sailing-boats extremely fatal. — p. 86. 



Such encroachments on the productiveness nf the German l'laice 

 Fishery seem all the less commendable, a.s a considerable diminntion in 

 the stock of Piaice, according to our investigations hitherto, is not at all 

 apprehensible. — p. 67; 87. 



18. The protection of the j^oung-fish grounds, which is so highly 

 desirable, can be ensured most effectually by fixing the minimum lengtli 

 so as to make it an impossibility for the steamers, in snmmer, to get there 

 any profitable fishing of Piaice (as chief catch). 



To throw again into the sea the Piaice below the minimum length 

 "in the hauls of the steamei-s, would be of little nse as they are nearly all 

 already dead. 



With the minimum length of 22 cm the desired result would accord- 

 ing to the investigations be attained. — p. 88. 



With this minimum length the Piaice of tlir tirst three years would 

 at the same tim(^ be completely protected, and this would be of all the 

 greater imitortance, as exactly in their third year the growth in length is 

 the greatest and quiekest. — p. 87 — 89. 



19. The introdiTction of a minimum length can only then be regarded 

 as a fair and effectual regnlation, if equally adopted by all the conntries 

 which take jiart in the fishing in the southern part of the North Sea. — p. 90. 



