] 4(i Thirhj-First Aiiniid] Mt'etiixj 



Ijrccd lluTi' n;itui'al!y for a time — in fact at one time there were 

 tliR'e rainbow trout to one s])eckled trout — and yet today you 

 ])erlia])s cateh in that stream in the course of a season a dozen 

 rainbow trout. l)ut the s])eekled trout still holds its own. There 

 are lots of places in Vermont where we have introduced rainbow 

 trout, and they have entirely disappeared — just the reverse of 

 ]\lr. Dean's experience in Missouri. 



The President: Do you attriluite it to the coldness of the 

 water as the winter comes on ? 



^Ir. Titcomb : 1 caniiot think of anything except the exceed- 

 ingly low tem|)eratures, and perhaps the conditions in the spring 

 during the spawning season are unfavoral)le. 



^Ir. I'eabody: We have had the same exj^erienee in Wis- 

 consin. 



Mr. Dean: The rainbow trout attains an enormous growth 

 in Colorado in the deep lakes. 



^Ir. Titcoml): With a deep water lake they can get any 

 temperature tliey want. They do not get anything below 40 

 degrees in those deep lakes in Colorado, even in the winter. We 

 get down 30 to 40 feet in our Vermont lakes in winter. 



Dr. Birge : In Lake Mendota in 83 feet of water in the 

 winter you gi't a temperature of 1 1-2 degrees Centigrade — say 

 between 34 and 'r,o Fahrenheit. 



^Ir. Titcoml): A good deal of the water in these Vermont 

 lakes comes from springs in the lakes. The lakes form from two 

 to two and a half feet of ice on the surface. The temperature 

 in tlie summer gets up to 80 degrees, but they have the same 

 cool temix'rature on the l)ottom. 



