FISHERIES OF PAMLICO AND CORE SOUNDS 49 
No direct observations on the causes of this selection in sizes were 
made in the course of the investigation. It may be remembered, 
however, that pound nets operate in different localities than do long- 
haul seines and upon bottom of different character. It must also 
be remembered that the size of mesh used in the seines is much 

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Fic. 8.—Length frequencies of gray trout from pound nets and long-haul seine catches in Pamlico 
gud (Core Sounds, N. C., 1925. The heavy vertical line is placed at the legal minimum size 
greater than that used in the crib of the pound net, and both of 
these factors, in all probability, are responsible. But whether this 
selection by pound nets and long-haul seines is due to the segregation 
of the size of fish according to the depth of water and character of 
bottom, or whether it is due to differences in size of mesh and in the 
method of operating the nets, is of little practical importance. That 
