FAMILY COREGONIDAE 



97 



Diagram, 4- Mouth arrangement in two species of Coregonidae, showing over- 

 hanging snout in Coregonus clupeaformis (A) and shorter upper jaw in 

 Leucichthys artedi (B) . 



Superior for spawning. They spawn during the last two weeks of 

 November on almost any type of hard bottom from shoal water to a 

 depth of 25 fathoms. Eggs taken from fishes procured November 21, 

 1921 oflF the mouth of the French River near Duluth ran 118,346 to 

 the quart. 



This species has great commercial value and large quantities are 

 sold annually from Lake Superior and other Great Lakes. The flesh is 

 excellent, and many are smoked or salted. 



NORTHERN CISCO (Northern Tullibee, 0-do-nee-bee of the 

 Red Lake Chippewas) 



Leucichthys artedi tullibee (Richardson) 



This tullibee (Figure 9) is common in Lake of the Woods and Rainy 

 Lake and probably in many other Minnesota and Wisconsin lakes. The 

 tullibee found in inland waters is deeper bodied than the form found in 

 Lake Superior. Koelz (1931) described 24 subspecies of L. artedi, mostly 

 from inland lakes of the northern and eastern states and including fishes 

 from only four Minnesota lakes. More subspecies could probably be 

 described if tullibees from all Minnesota lakes could be studied. Koelz 

 reports the subspecies L. artedi tullibee (Richardson) from Lake of the 

 Woods and from Rainy Lake. Although it is less desirable as a food fish 

 than the common whitefish found in inland waters, it exceeds the white- 

 fish in commercial value. 



TWIN LAKE CISCO (Inland Tullibee) 

 Leucichthys artedi woodi Koelz 



Koelz (1930) identified as belonging to this subspecies two Minne- 

 sota specimens from Wolf Lake in Beltrami County and two others 

 from Cass Lake. The body form and color of specimens from Wolf Lake 



