256 



BULLETIN OF THE BUREAU OF FISHERIES, 



Fishing was carried on at various depths in the open lake and in Spring Lake Creek 

 with gill nets measuring 75 by 4 feet. A 30 by 4 foot minnow seine was used in shallow 

 water along the shores. Trot-lines baited with earthworms were set a few times, 

 particularly to catch bullheads. Two hundred and three fishes, belonging to 1 7 species, 

 were examined, special attention being given to the ciscoes, which were plentiful in 

 deep water. 



In making examinations the skin, fins, mouth, and gills first received attention. 

 The fish was then slit open from vent to chin, and a careful inspection of the visceral 

 organs was made. The contents of the intestine was stripped out on a glass plate and 

 teased apart with needles under a binocular microscope, this being supplemented with 

 a compound microscope when necessary. The intestine was then slit open and 

 examined for food and parasites. 



The data relating to parasites are reserved for a general publication dealing with 

 several Wisconsin lakes; those concerning distribution and food are presented in this 

 paper. 



PISHES CAUGHT IN GREEN LAKE. 



Lepomis incisor (Cuvier and Valenciennes): Blue- 



gill. 

 Leucichthys birgei Wagner : Cisco. 

 Micro pterus dolomieu Lac^pfede: Smallmoutll 



black bass. 

 Micro pierus salmoides (Lac^pede): Largemouth 



black bass. 

 Notropis atherinoidcs Rafinesque : Shiner. 

 Percaflavescens (Mitchill): Yellow perch. 

 Pimephales notatus (Rafinesque) : Blunt-nosed min- 



Ambloplites rupestris {K3Si-a^s(\ne): Rock bass. 



Ameiurus natalis (Le Sueur): Yellow bullhead. 



Ameiurus nebulosus (Le Sueur): Speckled bull- 

 head. 



AmiacalvahianiLens: Dogfish. 



Boleosoma nigrum (Rafinesque): Johnny darter. 



Catostomus commersonii (Lacepedej: Common 

 sucker. 



Cyprinus carpio Linnaeus: German carp. 



Esox lucius Linnaeus: Northern pike, pickerel. 



Eupomotis gibbosus (Linnaeus): Pumpkinseed. 



Fundulus diaphanus vienona (Jordan and Cope- 

 land): Top-minnow. 



Other species doubtless occur in the lake. Joe Norton, an experienced fisherman 

 living on the shore of the lake, says that gars are often seen. A sheepshead was caught 

 in the lake several years ago. 



DISTRIBUTION OF THE FISHES. 



In order to determine the distribution of the fishes in Green Lake four methods 

 were used. Gill nets were set at various depths; a minnow seine was used alongshore; 

 trot-lines were set; and some trolling was done with a spoon hook. 



The five gill nets used were always set tied together in a "string," all being of the 

 same size (4 by 75 feet), but differing in the mesh (bar measure: X, i, i>^, 2, 3 inches). 

 Nets were set in the morning and pulled the following day. Table 2 gives a complete 

 list of the catches in tlie string of gill nets. 



