36 



PAPERS ON ZOOLOGY OF MICHIGAN. 



It is understood that Table No. 9 does not give complete data on the 

 death rate of the species of the lake but it is considered suggestive. In 

 spite of the fact that many dead fish are eaten by water birds before 

 reaching shore and that the fish successfully caught and eaten by other 

 species can not be estimated, the data in Table 9 indicate a critical size 

 in the life of several species of fishes. Those fishes about two-thirds 

 grown (see table for length of majority of individuals) were most often, 

 beached. Again, as might be expected, the species most abundant in 

 the lake proper were represented on the beach by the largest number of 

 individuals. On the other hand those species found in the more re- 

 stricted habitats were represented by fewer individuals, and those con- 

 fined to streams by none. 



In order that these data might be verified a trip was made covering 

 the entire shore line of the lake of 15 miles in a single day. On this trip 

 all beached fishes were measured, examined and identified. The data 

 collected are given in Table 10. 



TABLE NO. 10. 

 Including a study of the shores about the whole lake (Aug. 3, 1913). 



Species. 



Average size 



Number. 



1. 

 2. 

 3. 

 4. 

 5. 

 6. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 



Smail-mouthed black bass, M. dolomieu 



Large-mouthed black bass, M. salmoides 



Yellow perch, Perca flavescens 



Pumpkin seed, Eupomotis gibbosus 



Notropus cayuga ' 



Hudson River shiner, Notropus hudsonius 



Common shiner, Notropus cornutus 



Cat fish, Arnieurtis melas 



Common yellow sucker, Catostomus commersonii. 



Rock bass, Ambloplites rupestris 



Log perch, Percopsus guttatus 



Pike-pickerel, Esox luchis 



Blue gill, Lepomis pallidus 



Lake whitefish, .4. a. cisco 



240 

 3.50 

 103 

 103 

 110 



78 

 107 

 204 

 290 

 132 



97 

 537 



98 

 140 



m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 

 m.m. 



1 



1 

 551 



1 



2 

 10 



7 



11 



177 



31 



72 



5 

 IQ 



2 



Total . 



881 



Note: — Several dead specimens of "Johnny darter" (Boleosoma nigrum) were observed 

 lying among the pebbles in the shallows about Grape-vine Point and Fairy Island. Because 

 of their lack of an air-bladder they are not thrown upon the beach as are the other species of 

 dead fish but they remain i i their habitat and are for the most part eaten by the crayfish. 



The figures in Table 10 show the same relations of species as those 

 in Table 9, the true lake forms being the ones most often beached. 



In conclusion it may be said that Perca flavescens, Percopsis guttatus, 

 Catostomus commersonii and Notropis cayuga were the forms most often 

 beached. 



The writer wishes to thank Dr. Max M. Ellis for suggestions and 

 help in this work. 



