34 UNIVERSITY OF WISCONSIN STUDIES 



ostracods 4.8; Planorbis .1; snails 26.6; clams 7.8; Sphaeridae .3; 

 plants 8.8; Arcella-like seeds 1.7; filamentous algae 9.5; sand 

 3.7; bottom 1.1; unknown 4.4. 



Two small carp were examined, June 25 and July 2. 

 Length: 33, 73; average 53. Food: chironomid larvae 7.5; 

 beetle larvae 5; chironomid pupae 50; Cyclops 32.5; ostracods 5. 



Dorosoma cepedianum (Le Seur), gizzard-shad 

 Two specimens from a commercial seine were examined on 

 July 13. They measured 283 mm. and 286 mm. in length and 

 had eaten: chironomid larvae .5; Helea larvae 1.5; filamentous 

 algae 22.5; sand 35.5; fine bottom debris 40. 



Eupomotis gibbosus (Linnaeus), pumpkinseed 

 Eight small pumpkinseeds caught July 7 and 8 in a coulee 

 opening Lake Pepin on the Minnesota shore gave the following 

 results: Length: 87-102; average 92. Food: chironomid larvae 

 19; caddis fly larvae .3; beetle larvae .6; chironomid pupae .3; 

 beetles 4.4; damsel fly 1; snails 73.8; plants .8. 



Esox lucius Linnaeus, pickerel 



Ten pickerel were examined, June 23 to 28. Length: 104- 

 424; average 301. Food: fish 88.8; beetle larva 11.2. One indi- 

 vidual contained no food. 



Hiodon tergisus Le Seur, mooneye 



Nine adults caught in a commercial seine were examined; 

 June 25 to July 10. Length: 203-326; average: 246. Food: in- 

 sect eggs 2.2; chironomid larvae .6; Corethra larvae 7.2; mayfly 

 nymphs 3.3; Corethra pupae 25.6; chironomid pupae .3; beetles 

 1.4; Daphnia 36.7; Leptodora 21.9; plants .6. 



Six small mooneyes, caught in a minnow seine alongshore, 

 were examined, July 5 to 14. Length: 28-41 ; average 35. Food: 

 Daphnia 54.2; Cyclops 45.8. 



Ictalurus punctatus Rafinesque, channel-cat 

 Twelve specimens from various sources were examined, 

 June 23 to July 14. Length: 246-412; average 307. Food: fish 

 9.4; chironomid larvae 1.1; fly larvae .1; damsel fly nymphs 1.2; 

 mayfly nymphs 12; Sialis nymphs 26; Corixa nymphs -}- ; beetle 

 larvae .5; Leptocella larvae and cases 1.7; Leptocerus larvae and 



