142 



These estimates agree generally with what we know, 

 from other considerations, of the intensity of fishing on 

 the East side of the Irish Sea. It is well known that 

 there is a very great amount of fishing on the Lancashire 

 Coast proper, that the Coasts of North Wales are not 

 exploited to the same extent, and that the two great 

 Welsh Hajs are fished to a very much less extent again. 



These estimates must be regarded as only 

 approximate ones. It is no doubt the case that a certain 

 number of the fish liberated in each experiment must die 

 from injuries received during trawling which were not 

 at first apparent. On the other hand, there is also no 

 doubt that a certain proportion of marked plaice have 

 been caught by fishing boats and have escaped notice and 

 so have not been included in the above summary. 



Influence of different kinds of fishing. 



The tables give information as to the kind of vessel 

 or fishing instrument by which most of the marked fishes 

 were caught. This information was not always given, so 

 that all the cases are not included. The fisrures are : — 



No. of 



marked 



fish 



returned. 



Method of fishing. marked 



i fish 



1st class sailing trawlers (smacks) ... 

 2nd class sailing trawlers (half-decked boats) 

 Stake-nets 

 Steam trawlers 



Lines, " tees," trammels, hedge-baulks, " draught- 

 nets" 

 Information not given 



66 

 47 

 25 

 10 



6 

 41 



195 



This table gives one a rough idea of the relative 

 importance of dift'erent methods of fishing in the area 

 embraced by the experiments. It must be remembered, 



