SEA FISHEKIES LABOEATOEY. 



81 





Fish 



> > 



60 , 



10 



7-8 



after 60 min. 



, 4 dead. 



Shrimp 



>» 



75 , 



5 



H-5 



55 



70 



,, 



all alive 



Fish 



» > 



75 , 



5 , 



3£ - 6 



55 



180 



55 



all alive. 



Shrimp 



» j 



45 , 



» 7 , 



2i-4 



55 



70 



1 5 



all alive 



Fish 



5 5 



90 , 



3 



8^ 



'5 



90 



,, 



all alive. 



Shrimp 



J) 



70 , 



12 



j 2i-6 



55 



60 



5 5 



2 dead. 



Fish 



5 J 



75 , 



4 



6-8J- 



5 5 



150 



5 5 



all alive 



Fish 



55 



60 , 



14 



6-9 



,. 



120 



55 



1 dead. 



Shrimp 



55 



60 , 



3 



, 4 



55 



60 



55 



all alive. 



Fish 



55 



75 , 



2 , 



, 9-91 



55 



35 



55 



5» 



Fish 



75 



90 , 



3 



6-7 



55 



105 



5 5 



55 



Fish 



55 



105 , 



8 



7i-9i 



55 



105 



,, 



55 



Fish 



55 



125 , 



9 



3-51 



55 



75 



55 



>5 



Fish 



55 



' 75 , 



11 5 



5-6i 



5? 



125 



„ 



55 



Shrimp 



,, 



60 , 



9 5 



2-5 



55 



110 



55 



5» 



Shrimp 



5 5 



30 , 



20 , 



» 2 



,, 



75 



,, 



all alive. 



Shrimp 



55 



45 , 



8 



2-5 



55 



65 



5 5 



2 dead. 



Shrimp 



55 



40 „ 



22 , 



2-5 



55 



105 



55 



all alive. 



Thus out of 393 plaice, caught some with shrimp and some 

 with fish net, 318, or 81 per cent., have recovered after being 

 on an average about an hour in the tub. It does not appear 

 that the one net is any more fatal than the other. It must 

 be remembered however that these experimental hauls were 

 of short duration and that under ordinary circumstances the 

 fish trawl is down for about six hours.* Probably the great- 

 est mortality is caused when the net is down for a consider- 

 able time and accumulates a great weight of fish, or of 

 starfishes, or gets choked with mud and rubbish, or when in 

 rough weather the net full of fish is bumped heavily on the 

 side of the boat in being got on board. It is astonishing 

 however how even a crushed looking plaice may sometimes 

 recover when put in the tub. 



* However in our district the greatest destruction ot young food fishes is 

 certainly caused by the shrimpers and other smaller boats fishing in inshore waters 

 which in many places are the fish nurseries. 



