SUMMARY AND GENERAL REPORT, 



A short account is given of the results of the trawhng experi- 

 ments and of the marking experiments. 



These experiments have been reviewed for the whole period 

 they have been made in Northumberland in an attempt to show 

 that the fish along the east coast are distributed definitely accord- 

 ing to a law. It has been shown that each species is resolved 

 into schools which migrate outwards and inwards to winter and 

 summer grounds. There are species which winter offshore to the 

 north of the summer feeding ground (northern migrants), and 

 species which winter offshore to the south of the summer 

 feeding ground (southern migrants). The result of the annual 

 migration is to determine the species in each case to the north 

 or the south of the inshore summer ground. The law may be 

 stated therefore as follows : The species which frequent the 

 inshore (in summer at least) are distributed so that a northern 

 migrant predominates at the northern part of the summer inshore 

 region, and the sub-divisions thereof, and a southern migrant 

 predominates at the southern part of the summer region, and 

 the sub -divisions thereof. 



The contribution to the subject in this report gives the results 

 of an analysis of the trawhng experiments with reference to 

 size and period of the year. From this it is clearly evident that 

 the schools are composed of the young and immature, and the 

 periodicity of the immigration and emigration is better defined. 

 A consideration of the results of marking experiments bears this 



