SEA-FISHERIES LABORATORY. 233 
interest, since it is a plaice fishing ground in which 
trawling is prohibited by statute. It is in the area 
administered by the Fishery Board for Scotland, but we 
have been allowed to trawl there for experimental 
purposes, and a series of plaice-marking experiments 
have therefore been made. 
Considering, then, this distribution of the plaice 
fishery areas, one feels justified in grouping together the 
various marking experiments as follows :— 
(1) “Luce Bay.’’ Five experiments have been 
made, all in the months October and November. 
(2) ** Morecambe Bay.’’? A number of experiments 
have been made with fish caught off the mouth of 
Barrow Channel, and near Fleetwood, and these plaice 
have, as a rule, been liberated in Morecambe Bay or just 
outside the latter. The symmetry of the series is spoiled 
by three experiments: 10-05 and 11-’05 relate to fish 
which were captured in the waters of Morecambe Bay, 
but which were liberated to the West of Morecambe Bay 
Light Ship, well off-shore. I have not hesitated to 
group these two experiments with others, and to regard 
them as ‘‘ Morecambe Bay” ones for the following 
reasons :—Of the 74 plaice set free in experiment 10-’05 
practically all must have returned into the Bay for an 
unusually large proportion were recaptured immediately 
after liberation in Barrow Channel and other parts of 
Morecambe Bay. Experiment 11-’05 dealt with a small 
number of fish, and very few were recaught, the fish 
being in very bad condition when liberated. In experi- 
ment 5-’06 plaice caught in the rivers Lune and Wyre 
were set free near Blackpool. The results of the 
> experiments may be regarded as 
‘“ Morecambe Bay’ 
indicative of the movements of plaice from out of this 
area into other parts of the Irish Sea. 
Q 
