SEA-FISHERIES LABORATORY 



173 



same day on a very limited area — the deposit ground. 

 The hauls were made immediately after each other, and 

 the length of ground trawled over varies slightly, but in 

 an insufficient degree to account for the difference in the 

 catches. 



Four hauls made on the Mersey Deposit ground 

 on February 16th, 1894. 





I. 



| hr. ebb ; 

 2 miles long. 



II. 



3 hrs. ebb ; 

 If miles long. 



III. 



4f hrs. ebb ; 

 2 miles long. 



IV. 



Low water ; 

 1^ miles long. 





6 

 221 

 120 

 101 



7 



14 

 150 

 383 

 131 







44 



210 



34 



2 









284 



Dabs 



33 



Whiting 



Shrimps (in 

 quarts) . . . 





 2* 



Hauls made on the same day, by the same vessel and 

 net, for the same time and over the same length on the 

 Blackpool closed grounds, have given equally dissimilar 

 results. 



Two hauls on the Blackpool closed ground on 

 January 13th, 1902. 



High water ; 

 1J miles ; 1 hour. 



II. 



2 hours ebb ; 



1J miles ; 1 hour 



Shrimps 

 Plaice . 

 Dabs.... 

 Whiting 

 Codling. 

 Herring 



15 quarts. 



4 quarts 



340 



394 



10,900 



24,300 



400 



540 



100 



270 



156 



90 



These instances illustrate the contention that hauls 

 made on the same limited area and on the same day under 



