Preface and Summary. 6a 



In regard to tbe sailing fishing-boats no satisfactoiy statistics liave 

 tili now esisted. — p. 71. 



Thoiigh uü certaiu pioof can as yet be given as to the numerical 

 decrease of Piaice, still, in the opinion of experienced fishermen there can be no 

 donbt that Piaice were moie numerous in former times than now. — p. 70; 71. 



12. As it is an indisputable iact that large Piaice have decreased in 

 luimber, and that the price of large Piaice per Kilo is higher than that 

 of small Piaice, it would be of advantage for the retnrns from the Fishery if 

 the relative nnmber of large Piaice landed were to increase. This can only 

 be done by preserving and protecting yonng Piaice of a certain length. 

 The success of this regiilation would be all the more qnickh' ensnred the 

 higher the minimnm length be fixed. This protection of the small Piaice, 

 dnring tlic inevitable fishing of the large Piaice, now appears from a 

 practical point of view to be the only possible means of ensuring that the 

 stock should be maintained at a stable and satisfactory height. - p. 63; 73 f. 



13. The expediency of a high niinimum size in the interests of bio- 

 logy is limited by the requirements of the piactical fishery. These 

 rerpiirements for our North Sea Fishery are: 



a) the same minimnm size for the landings of the steamers and the 

 sailing-boats, 



b) such a regnlation that the prodiict of the entiie Piaice fishing 

 shoiild not snffer on that acconnt any considerahle diminution. — [i. 75. 



14. (Jur careful investigations abont the hauls and the fish \\hi<h the 

 steamers and sailing-boats bring to the market, enable us to estimate approx- 

 imately what loss wonld in the first instance (and then ultimately) accnie on 

 a minimnm length being introduced. This loss to the sailing-boats is always 

 greater than to the steameis, as the average length of the Piaice in their 

 hanls is smaller than that of the steamei' hauls; and besides, they bring 

 the greater pai't of their smaller Piaice living to the market, and for 

 this i-eason have a much greater profit from them than the steamers. 



A minimnm size of 28 cm wonld raean a diminution of- the quan- 

 tities whicli the steamers bring to land of abont 47 "/o in number, and 22'7„ 

 in weight; and of the sailing-boats 76"/,, in number, and 63"/,, in 

 weight. A 25 cm minimnm size would mean to the steamers a loss of 

 about 18"/,, in number, and 7 "/„ in weight; — to the sailing-boats on the 

 other band coriespondingly 36",'« 'ind 25 "/„. 



The same with a length of 22 cm to the steamers 1 '/j "/o '" nnmbei-, 

 and '(j"/„ in weight, — to the sailing-boats 3";„ in number, and 2"/„ 

 in weight. With 20 cm length, to the steamers 0,1",,, in number, and 



