SEA-FISHERIES LABORATORY. 251 



Experiments 11 and 16 may be considered together, 

 since the times and stations of liberation were much 

 the same. Neither experiment has, apparently, been 

 successful. Last year (1905) several marked plaice were 

 recaught in Tremadoc Bay, and it was thought desirable 

 to fish there and mark a number of fish during the last 

 summer. Accordingly 91 plaice caught near Pwllheli 

 were liberated in June and July, but so far only four of 

 these have been returned. One, No. LL217, was recaught 

 in almost the same place where liberated, but the other 

 three have made rather long journeys. One was caught 

 in Dublin Bay about five months afterwards, having 

 crossed the deep water of the Irish Channel, and two came 

 North into Lancashire waters, one being recaught in 

 Bed Wharf Bay and the other in the Kibble Estuary. 

 These two latter cases and another are the only instances 

 noticed so far of plaice coming North from the Welsh 

 Bays into Liverpool Bay, though the reverse migratioa 

 has been observed many times already. 



This paucity of recaptures is not to be attributed to 

 the fact that the amount of fishing in Cardigan Bay has 

 been less than usual. Capt. David Pritchard, the Head 

 Bailiff at Pwllheli, writes me as follows: — " In my 

 opinion, plaice have shifted for a time from the usual 

 fishing ground in Tremadoc and Cardigan Bays. Our 

 fleet of 15 small trawlers have been fishing at Tremadoc 

 Bay and at Kilan Grounds, and only one marked plaice 

 has been landed here. It is true that there were only two 

 Southport trawlers in our bay last summer (1906), as 

 against 22 the year before, but the plaice, turbot 

 and brill were very scarce last summer (1906). 

 There have been several large trawlers at work in 

 Cardigan Bay during the last two months, landing their 

 fish at Pwllheli, but a very small quantity of plaice were 



