44 UNIVERSITY OF WISCONSIN STUDIES 



Micropterus salmoides (Lacepede), largemouth black bass 



A little bass 48 mm. long caught on August 3 had eaten 

 nothing but fish. 



Notemigonus crysoleucas (Mitchill), bream 



Five breams were examined, July 19, 21. Length: 49-81; 

 average 62. Food: chironomid pupae 26; Hyalella 2; Daphnia 

 70.8; Cyclops .2; Chara 1. 



Notropis atherinoides Rafinesque, shiner 



Seven specimens were examined, July 21. Length: 48-75; 

 average 59. Food: chironomid pupae 49.7; midges 50; sand .4. 

 One individual contained no food. 



Notropis hudsonius (De Witt Clinton), shiner 



Eleven shiners were examined, July 19, 21, 29. Length: 

 29-51; average 39. Food chironomid larvae 14.4; chironomid 

 pupae 2; Hyalella 18; Daphnia 21; Alona 7.3; Cyclops 4.1; 

 ostracods 28.2; mud .5; sand 4.5. One individual contained 

 no food. 



Necturus maculosus Rafinesque, mud puppy 2 



A mud puppy was caught on a trot-line in Sturgeon Bay, 

 July 20. Its food consisted of: fish 3; minnows 97. 



Perca flavescens (Mitchill), yellow perch 



Twenty- two adult perch were examined, July 19 to August 

 5. Length: 117-240; average 163. Food: fish 12.8; ciscoes 5.2; 

 minnows 5; chironomid larvae 1.1; mayfly nymphs 38.9; chiro- 

 nomid pupae .6; amphipods 1.2; isopods 2.5; crayfishes 12.8; 

 Mysis 19; Alona +; Daphnia 1.1; Eurycercus .2; Chydorus +; 

 ostracods .1; mud 2.8; unknown 3.1. Four individuals con- 

 tained no food. 



Five small perch were examined, July 19. Length 71-87; 

 average 77. Food: Micropterus dolomieu 3; chironomid larvae 

 13.4; damsel fly larvae 6; chironomid pupae 3.8; crayfishes 16; 

 Hyalella 32.8; Asellus 8; Daphnia 9.6; Eurycercus .4; Cyclops 

 2.2; ostracods .4; plant .2. 



Not a fish. 



