47 



Table II. The same data as on p. 46, but expressed as numbers 



of fish caught per hour's trawling (if less than one fish results 



from the calculation the species is omitted). 



Kind of Fish. 



All edible fishes 



Witch 



Plaice 



Dab 



Lemon Sole ... 



Sole 



Brill 



Flounder 



Megrim 



Haddock 



Hake 



Whiting 



Cod 



Coalfish 



Grey Gurnard 

 Red Gurnard 

 Yellow Gurnard 



Ray 



Skate 



Mean depth ... 



Firth 



of 

 Clyde. 



83 



40 



11 



4 



1 



1 



11 

 1 

 1 



West 

 from 

 Isle of 

 Man. 



44 



10 



1 



1 



1 



11 



10 

 1 



Offshore 

 grounds. 



30 



Cardigan 

 Bay. 



83 



29 



14 



1 



10 



1 



1 



1 



19 



1 



Liverpool 

 Bay. 



171 



79 

 65 



Luce 

 Bay. 



239 



168 



38 



1 



1 

 1 



3 

 1 

 1 



1 

 23 



22 



32 



21 



12 



6-5 



The first of the above tables gives the actual numbers of 

 hauls and hours of fishing, and the numbers of fish of different 

 species that were caught. The second table simplifies the 

 former one in that it gives the numbers of fish caught per 

 hour's trawUng, in all the trials, and neglects all results in which 

 less than one specimen — on the average — has been taken. A 

 further simplification is rendered possible by the following 

 diagram, which takes account only of about two-thirds of all 

 the fish caught — that is, it gives us a fair idea of the prevalent 

 kinds and abundance of trawl-fish present in our whole region. 



