286 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



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 Bays 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 figures are:- 







No. of 



Method of fishing. 





marked 



fish 

 returned. 



1st class sailing trawlers (smacks) ... 





66 



2nd class sailing trawlers (half-decked boats) 





47 



Stake-nets 





25 



Steam trawlers 





10 



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



M- 





nets" 





6 



Information not given 





41 



195 



mi 

 en 



This table gives one a rough idea of the relative 

 portance of different methods of fishing in the area 

 braced by fche experimental l< "»'< s ^ be remembered, 



