182 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Object. 



By whom 

 carried out. 



Methods. 



To determine the nature and amount of the migra- 

 tions between fishing grounds and between intra- and 

 extra-territorial waters. To trace the spawning migra- 

 tions, and to estimate the rate of growth of these fishes. 



Crew of Steamer "James Fletcher"; Naturalist on 

 board steamer; and Naturalist at Liverpool Laboratory. 



Involves the marking of at least — 



200 plaice in Morecambe Bay in March-April. 



400 plaice in Nelson Buoy Fishing Area (Bibble 

 estuary) — June- July . 



200 plaice in Mersey and Dee Area — July- 

 September. 



400 plaice in Beaumaris and Red Wharf Bays — 

 November- January. 



200 flounders in Morecambe Bay. 

 The examination of the marked fish returned to the 

 Liverpool Laboratory. 



3. Routine Trawling Experiments. 



Object. 



By whom 

 carried out. 



Methods. 



Svstematic trawling observations with the object of 

 determining abundance and distribution of edible fishes 

 in general on the fishing grounds not specifically 

 mentioned under headings 2 and 3, and on those fishing 

 grounds at periods intermediate to those on which the 

 observations and experiments under 2 and 3 are being 

 made. 



Steamer "James Fletcher," and Bailiffs' sailing 

 vessels; Naturalist on board steamer; and Naturalist at 

 the Liverpool Laboratory. 



Trawling experiments by vessels mentioned above, 

 the collection of material by Naturalist on board steamer 

 for further examination at the Liverpool Laboratory. 



