212 



CoUcijc of forestry 



s])cciincns of fisli were examined and some very interesting 

 data was obtained bearinj^' in part on the length of time that 

 food remains in the stomach. In Table No. 55 observations 

 on yz fish, of 12 species, are listed and the condition of the 

 stomachs indicated. Of course, there was no way of knowing 

 when the lish entered the trap, or just how long they were 

 in it. Some of them undoubtedly had been caught not more 

 than 24 hours but the data obtained siujycst that this per- 

 centage of fish with food in the stomach decreases markedly 

 with the greater time interval. Table No. 56 shows, for 

 exam])le, that of the 24 hour fish, 50 percent had food, the 

 4S hour fish had 12.9 percent with food, and that the "2 hour 

 fish were without food. All were fully mature fish. The 

 intestines of all fish contained some partly digested (macer- 

 ated) matter which also decrea.sed in amount and degree of 

 digestion as the number of hours increased. 



Tahlk No. 55. Food in Fish C.\ught in Tr.vp Net 



Fish" 



Net set 

 Hours 



Fish 

 examined 



Fish 

 with food 



P'^ish with- 

 out food 



Common Bullhead. 

 Common Bullhead. 

 Yellow Bullhead. . . 



Yellow Perch 



Rock Bass 



S. M. Black Bass. . 

 vS. M. Black Bass.. 

 L. M. Black Bass.. 



PimiDkinseed 



Bluegill 



Calico Bass 



Calico Bass 



Carp 



Chain Pickerel .... 

 Chain Pickerel. . . . 

 Chain Pickerel .... 



Pike Perch 



Pike Perch 



Pike Perch 



Totals. 



24 



48 

 48 

 48 



24 

 48 



72 

 48 

 72 

 48 



24 

 48 



24 

 16 



24 



48 



24 



48 

 72 



4 

 15 

 4 

 7 

 2 

 I 



3 

 I 



5 

 4 

 I 



4 

 3 

 I 

 I 

 2 

 I 

 9 

 3 



71 



13 



2 



13 

 4 

 6 

 o 

 o 



3 

 I 



5 

 4 

 o 



3 

 3 

 o 

 I 



2 

 o 



8 

 3 



58 



''Soe pagj 220 for scientific names of fish. 



