48 :i 



REPORT ON TRAWLING AND OTHER INVESTIGATIONS 



no general tendency to return to Teignmouth Bay, — several fishes 

 recovered during the following sunnner having been found either in 

 Torbay or Start Bay or in their immediate neighbourhood (cf. Nos. 268, 

 236, 320, and 357). 



The details of capture thus confirm the results of the previous 

 statistical treatment of these experiments. They show that Teign- 

 mouth Bay is an important source of supply of young plaice, both for 

 the offshore grounds in the Brixliam area and for the other bays to the 

 southward. The upkeep of the general stock of plaice in the district 

 would indeed appear to be largely dependent on the preservation from 

 destruction of the young fish in this bay. 



IV. Outside the Bays. 



The three preceding sets of experiments in the bays were carried out 

 in the autumn of 1901. In the early summer of 1902 Dr. Kyle marked 

 and liberated a number of plaice outside Start Bay and Torbay in order 

 to throw special light on the summer migrations. Eleven plaice were 

 marked outside Start Bay on April 12th to l-lth, and sixty-two plaice 

 were marked and liberated midway between Berry Head and the 

 Orestone on May 29th. As the recoveries in each case show the same 

 general tendencies, they may be taken together. The following 

 analysis shows the sizes of the fishes marked and the numbers re- 

 covered inside and outside the bays during successive periods. In 

 comparing this table with the preceding tables referring to the bays, it 

 should be borne in mind that the first half-year is now a summer and 

 autumn period, and not a winter period, as in the previous experiments. 



Table XXIIL, showing the nnnihers and sizes of Plaice marked outside 

 Torhay and Start Bay, and the numbers recovered in successive ])eriods 

 inside and outside the hays. 



