129 



(2) Into Bristol Channel, St. George's Channel, the English 



Channel. 

 There were reported : 



In April to June, the year after, 2 fish of mean lengtli — 29-0 cms. 



„ July to Sept., ., 4 „ „ = 30-7 „ 



„ Oct. to Dec, „ 1 „ „ = 29-7 „ 



„ July to Sept., 2 years after, 1 „ „ = 36-5 „ 



„ April to June, 3 years after, 1 ,, „ = 36-2 ,, 



(3) To the E. and S.E. Coasts of Ireland. 



There were reported : 



In April to June, the year after, 3 fish of mean length = 28'5 cms. 

 „ Oct. to Dec, „ 1 „ ,. = 350 „ 

 „ July to Sept., 2 years after, 1 ,, „ = 41-9 „ 

 „ Oct. to Dec, „ 1 „ „ = 39-0 „ 

 „ July to Sept., 3 years after, 1 „ „ = 38-0 „ 



Thus the large (that is, the more nearly mature) of the 

 plaice inhabiting the grounds between N. Anglesey and 

 Carnarvon migrate down channel into the great Welsh Bays, 

 St. George's Channel, the Bristol Channel, the S. and E. Coasts 

 of Ireland, and the English Channel. Of the plaice liberated 

 on the N. Welsh ground and recovered, 28 per cent, had been 

 recaptured on the same grounds or bad gone back into the 

 Irish Sea ; 5 per cent, were recaptured in Carnarvon and 

 Cardigan Bays, and 4 per cent, were recaptured in St. George's 

 Channel, the Bristol Channel, on the S. and E. Coasts of 

 Ireland, and in the English Channel. 



Where do these plaice that are taken on the N. Welsh 

 grounds come from ? The Liverpool Bay marking experiments 

 answer this question. They come from the nursery grounds 

 on the Lancashire coast. Of the plaice that migrate out from 

 those grounds in the summer months, a considerable fraction 

 of the larger ones go down to the Red Wharf-Beaumaris Bays, 

 where they form the material of the fishery that sets in during 

 the back-end. 



