APPENDIX H: GARSTANG 



14 



The growth of the Bridlington Bay fish is directly comparable with that of the Danish 

 fish on the Horn Eeef Grounds, since the fish in both series of experiments were marked and 

 liberated during April. Six months' growth had been attained in each case by October, when 

 the average increase of the Danish fish was only 2"0 cm.^ whereas the average growth of the 

 transplanted fish was 11 '9 cm. In November the average growth of the Danish fish was only 

 3-0 cm., whereas that of the transplanted fish was 13-7 cm. The growth of the transplanted 

 fish on the Shoal of the Dogger is therefore between 4 and 5 times as great as on the Horn 

 Eeef coastal grounds. In six mouths they had already exceeded the normal growth of two 

 years on the coastal grounds. 



The plaice transplanted to the Shoal of the Dogger from the Horn Eeef G-rounds had 

 six weeks' less growth at the beginning of the period than those transplanted from Bridlington 



l'I- 

 IS- 

 12- 

 II- 

 10- 

 9- 

 ,8- 

 7- 

 6- 

 5- 

 li- 

 3- 

 2- 

 1- 

 0- 



Pig. 1. Diagram, illustrating tho Rate of Growth of Marked Plaice (1) under normal conditions 

 on the Horn Reef Grounds and in Veno Bugt (Lim Fjord), and (2) after transplantation to Thisted 



Bredning (Lim Pjord) and tho Doggerbank 



Bay. In spite of this the average growth of seven fish by October was 11 '4 cm., and of 

 'three fish in November ITS cm. If allowance be made of about 1-5 cm. for the growth from 

 April 13* to the end of May, it will be seen that the growth of the Horn Eeef fish on the 

 Shoal of the Dogger was approximately identical with that of the Bridlington Bay fish on the 

 same grounds. 



In the accompanying diagram the normal growth on the Horn Eeef Grounds and in Veno 

 Bugt is shown by means of curves, and the growth after transplantation to the Dogger Bank 

 and Thisted Bredning is also shown for the sake of comparison. 



As is well-known the Danish experiments with marked plaice in the Lim Fjord in 1895 

 showed a greater increase in the less populated waters of the Thisted Bredning than in those 



