COUNCIL - SEPT. 1910 - APPEND. Ü — 64 — 



Third Sitting: Saturday, 24th September 1910, 10 a. m. 



Dr. HjoRT, Chairman. 

 Present: Members of Council and experts. 



Prof. Henking gave a lecture on the results of observations on the growth 

 and development of flounder and plaice in the Baltic. A great many marking 

 and transplantation experiments had been made by Dr. Fischer of the German See- 

 fischerei-Verein, on the flounder in the central parts of Baltic, and on the plaice in the 

 Western Baltic. In the case of the latter North Sea plaice had been transplanted 

 from the North Sea to Kiel Bay, where 12 per cent, had been recaptured within 

 8 months and showed the interesting result that their growth in size was much 

 greater than that of Baltic plaice in the same Bay. 



Prof. Heincke emphasized the importance of these transplantation experiments 

 and stated that the converse experiment had been made, of transplanting Baltic 

 plaice to the North Sea, where they retained apparently the characteristics of 

 Baltic plaice. 



The discussion was continued by Dr. Johansen who referred to the Danish 

 experiments on the different growth of the plaice in the Belt Sea and Kattegat, 

 and Prof. Henking in summing up remarked upon the possibility of a practical 

 outcome from the experiments. 



e. Prof. Thompson gave a brief account of the contents of his report for the 

 year 1909 — 10 on the later stages of the gadoids. The material collected 

 by the "Goldseeker" over a series of years formed the basis of his report. 

 Charts and diagrams were shown at a later meeting. 



In the ensuing discussion the question arose of the material Prof. Thompson 

 might rely upon obtaining from other countries for his 1910 — 11 report. 

 Dr. Hjort offered a very large quantity of material on the cod from Norway 

 and Mr. Archer stated that a good deal of material would be available 

 later from England. 



f. Dr. Hjort gave an account of the present state of the investigations on the 

 herring, referring to the report which had been published as one of the 

 "publications de circonstance". He asked the meeting whether they desired 

 that a similar report should be drawn up next year or whether only the 

 material should continue to be collected. 



Prof. Thompson criticised the investigations on the age and growth of 

 herring as determined from the scales, holding that, which in a group of 

 herring the mean number of rings was probably a correct indication of the 



