1^4 Tliirti/scrcnlli Aniiiidl Mcefiiuj 



five (k'<iive8 L\ while the to]) is niiK'teen degrees ('. Here a<;aiii 

 we caught Tullil)ee in great inimhers at the maxiniuni (U'])th, 

 and none aho\'e, even after repeated efforts. 



We have here then a species of whitetish, hirge enough and 

 of good enough quality as food to he worthy of economic consid- 

 eration ; that seems to he ahle to adjust itself to quite various 

 conditions of environment. Certainly its adaptahility is very 

 much greater than that of Coirgonus lahradoricus, which, so far 

 as our experience goes, occurs only in the deep waters (in sum- 

 mer) of lakes approximating Long Lake in their physical char- 

 acters. Of course, there is a limit to the ada])tal)ility of the 

 TuUiljee, as is shown by its restriction to certain depths in Ijoth 

 Long Lake and North Twin Lake. 



Nevertheless, the species seems to he a very promising form 

 for introduction into certain large shallow lakes, hi Lake Pepin 

 on the Mississippi, Lake Winnebago, and some others, we have 

 lakes that are comparatively shallow, and so large that their 

 unlilizntioii for commercial fisheries, as well as for sport, is not 

 only |iossilile, hut highly (U'sirable. Lake Pepin is now being 

 so utilized to a very large extent. But it yields oidy the coarser 

 fish, such as butfalo. carj), and to a certain extent. s])Oonbills. 

 The siicci'ssful introduction of a whitelish into this lake, and a 

 proper regulation of its ca])ture, would prove a great and lasting 

 benefit. Whitefish (Coregoiuis clupciformis Mitchellj have in- 

 deed been planted in it. l)ut with no success, the genus Coreijoinis 

 being set'mingly not ada])table to such waters. But it seems 

 to us highly probable that with so adaptaljle a form as the Tulli- 

 hee, and with heavy and persevering planting through four or 

 five years, success could be attained. And there are other lakes 

 in Wisconsin, and probaljly elsewhere, where it could be intro- 

 duced and its fishing permitted under certain restrictions, Avith- 

 out any detriment whatever to the game fishes. 



DISCUSSION. 



Dr. Frank X. ("lark. Xorthville. Mich.: T think the recom- 

 mendation is that the tullibee bt' ])lanted in tliese lakes where 

 true whitefish will not succeed. 



Dr. Birge: Yes, where tln-re is at least a chance of that. 



