296 Lake Maxinkuckee, Physical and Biological Survey 



12. Grayback Minnow. Fundulus diaphanus. 



Abundant in shallow water and makes excellent bait. The 

 stomachs of four of these killifish contained several small snails, 

 six water mites, many Bosmina and a few Cypris. In each of 

 them were also found several trematode parasites. 



13. Top Minnow. Fundulus dispar. 



Fairly common along shore, but more abundant in the Outlet 

 and in Lost Lake. The stomach contents of three examined con- 

 sisted entirely of surface plankton, amongst which was a cope- 

 podid larva of Achtheres which also swims at the surface. 



14. Brook Stickleback. Eucalia inconstans. 



Nothing was learned of its food under natural conditions but 

 some which were kept in an aquarium eagerly snapped up red 

 worms (Chironomus larvse) and small entomostraca, such as 

 Cypris, shaken from the towing net into the water. 



A single specimen was secured in a good state of preservation 

 from the throat of a large-mouthed bass which was just endeavor- 

 ing to swallow it. There was nothing recognizable in the stomach 

 and no parasites of any kind were found. 



15. Skipjack. Labidesthes sicculus. 



This species is also abundant in shoal water along the shore. 

 Like the top-minnow it feeds almost exclusively at the surface, 

 frequently jumping out of the water. Neither this species nor the 

 top-minnow is of much value for bait since they die so quickly 

 in the minnow buckets and when placed on the hook. 



16. Calico Bass. Pomoxis sparoides. 



Twenty specimens were examined, whose food so far as could 

 be determined consisted entirely of plankton and insect remains. 



From the gills of two of them were obtained six specimens of 

 Ergasilus centrarchidariim, while in the mouth of two others were 

 found several leeches. It was noticeable that the largest fish ex- 

 amined, one and a half and one pound respectively, were entirely 

 free from parasites, while the smallest ones were most infested. 



17. Red-eye; Rock Bass. Ambloplites rupestris. 



Two hundred and sixty specimens of this fish were examined, 

 and they were of all sizes from one inch to 11 inches in length. 

 The small ones were captured in a minnow seine, while the larger 

 ones were obtained from the fishermen. 



The food of the smaller ones, four inches and under, was found 

 to be chiefly plankton, and small fish. The plankton was largely 

 Bosmina, Daphnia, and Cyclops, and there were also a few may- 

 fly and other insect larvse. Among the small fish were two mad 



