1^0. 646] TAPEWORM INFECTION 



445 



of the experience in other states, it is a useless waste of 

 money to depend on the tish in a Large natural body of 

 water for spawn, because it is very difficult to control the 

 factors which insure success. 



Two other mountain lakes were next visited : Lost lake 

 on Roaring creek, near Keecheius, and Fish lake. 



Lost lake is stocked with eastern brook and cut-throat 

 trout, with the former predominating in much larger 

 numbers. The lake has been closed for sevoi-al years 

 and was utilized by the county game commi>sioners as 

 a ])lae(' for ()l)taining eastern brook-trout spawn. From 

 this lake Ncvciity-six l)i-()ok-trout and two cut-throat tront 

 were examined, and with the exception of two brook-trout 

 all the tish were found to be clean and healthy. The two 

 exceptions mentioned were each parasitized with a single 

 lar\-al tapeworm cyst. 



The situation at Lost lake seemed very striking as well 

 as signiticant, and it suggested the possibility that per- 

 haps the brook-trout are more resistant and innnune to 

 the parasitism of the tapewonn larvie. At any rate, this 

 is worth while testing out nnu'h nioro tlioroimiily. 



One other point wliicli the tri]) to Lost lake strength- 

 ened was in regard to what has already been said con- 

 cerning the food supply of a closed lake. The fish in this 

 lake, although they were nearly all healthy, were nexcr- 

 theless very thin. The most prominent ])arts of thcni 

 were their lieads. In two cases the tish were so hnnuTv 

 that tiny captnivd field mice wlii<-h i.n.hal.ly attc]n].te<l 

 to <\siin acn.<> the lake. Tin— wiv !'nnn<l pai'tially .li- 

 g(-rrd within 111.' ^toniach^ of the li^h. 



At l-'i^h lake niw hnii.h-ed and iiMie ti-ont unv can-ht, 



ti<.n ri.vraled the fact that l\u■^ wen^ all h.^altlix ami elean. 

 There wa^rt a Hii-le in.lieatir.j! of ta[H'U..rni iiilrelh.n. 

 Fi^h lakr x\a^ an ..,n.n l-uh m' uat.T and thl^ pn.bab'v 

 aeeeunts tor the lH..ltliy state of the h^h. When sports- 

 m.'ii can get into a stream thry are a ><.nive of (ll^iiirh- 

 ance to the blue heron and other lish-eatiiiir l)ini-, and. 



