SEA-FISHERIES LABORATORY. 



Ill 



Table II. The same data as on p. 110, 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. 



West 



Firth from 



of Isle of 



Clyde. | Man. 



Offshore 

 grounds. 



Cardigan 

 Bay. 



Liverpool 

 Bay. 



Luce 

 Bay. 



All edible fishes ... 

 Witch 



83 ! 44 

 40 10 



30 



"i 



7 

 ' 2 

 "3 



'"6 



"*4 



1 



"2 



"*2 



1 



83 



29 



14 

 1 



10 

 1 

 1 



4 



"3 



"l 



19 

 1 



171 



"79 



65 



' '2 

 "2 



"3 

 "2 



15 



2 



239 





11 

 4 

 1 

 1 



"ii 



1 

 1 



1 

 1 

 1 



"*3 



1 



11 



168 



Dab 



38 





1 



Sole 





Brill 



Flounder 



1 

 1 











Hake 









Cod 





3 





1 



Grey Gurnard 



Red Gurnard 



Yellow Gurnard 



7 



10 

 1 



'"a 



1 



1 

 23 



Skate 











Mean depth 



22 



32 



21 



12 65 



7 







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 trawling, 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 Eaii idea of the prevalent 

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



