232 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



TRAWLING OBSERVATIONS. 

 By Jas. Johnstone. 



1. TRAWLING OPERATIONS IN LUCE BAY. 



2. TRAWLING IN FISHGUARD BAY. 



3. FOOD OF PLAICE, DABS AND OTHER FISHES'. 



4. REPRODUCTIVE PHASES OF HERRINGS IN 



CARNARVON AND CARDIGAN BAYS. 



5. SEA TEMPERATURE AND CATCHES OF WHITING. 



6. OCCURRENCE OF LARGE PLAICE AT NEW 



QUAY. 



1. Trawling Operations in Luce Bay. 



During 1905, as for several years past, the Fishery 

 Board for Scotland has kindly permitted the Committee's 

 steamer " John Fell " to trawl in Luce Bay for the 

 purpose of obtaining spawning plaice. Two visits were 

 made in 1905 — one on October 12th and 13th, and a second 

 on December 6th and 7th. On the first occasion the 

 weather was all that could be desired, and the trip was 

 made without any trouble ; but the second trip was 

 unfortunately deferred until December, and as very 

 unfavourable weather was experienced time was lost. The 

 trip was a most unpleasant one, and the results were not 

 nearly so successful as they might otherwise have been. 



On 12th October, one haul was made with the shrimp 

 trawl : the net was one with a half-inch mesh bent on to 

 a •'!<) feet beam. There was no object in making this haul 

 except to obtain some idea of the immature fish present 

 in the Bay. The results of this haul arc given in Table I. 

 They are very similar to those obtained in 1904, except 



