FINGER LAKES OF NEW YORK 



251 



The largest amount was obtained at 32 m. in Seneca Lake, where it reached 1,693 kg. 

 of dry material per square kilometer, or a little more 'than 15 pounds per acre. 



The deepest haul in Cayuga Lake yielded a larger amount of organic matter than 

 the deepest haul in any of the other lakes, while the one at 34 m. was the poorest of all, 

 due most probably to the fact that it was made on a very steep slope. Green Lake 

 showed the second largest amount of material in its deepest water and Canandaigua 

 Lake was third. In Seneca Lake the amount at 1 10 m. was only about three-quarters 

 as great as at 172 m. In general, it appears that the bottom fauna in the deeper water 

 of Green Lake yields a larger amount of dry organic matter per unit area than these 

 three Finger Lakes. 



Tabie 23. — Number op Individuals and Weight op Bottom Fauna Obtained at Dlpperent 

 Depths in Three Finger Lakes, N. Y., and in Green Lake, Wis., in 1918. 



canandaigua lake, JULY 28, 1918. 



Depth in 

 meters 



Organism. 



Chiron omiis . 

 Pontoporeia, 

 pligochaeta. 

 Chironomus. 

 Pontoporeia 

 .Oligochaeta. 



Number 



per 



square 



meter of 



bottom . 



800 



977 

 ,430 

 45 

 844 

 890 



Dry weight. 



Kilograms 

 per square 

 kilometer. 



319. 3 



469.0 



S33.9 



13. O 



405.1 



336.8 



Pounds 

 per 



1.95 

 4.17 

 4-65 

 . II 

 3.60 

 a. 91 



Organic matter. 



Kilograms 

 per square 

 Icilometer. 



I5S-0 

 353- o 

 459- I 

 8.5 

 303- 8 

 386.9 



Pounds 

 per 

 acre. 



1.38 

 3-13 

 4.08 

 .07 

 3.70 

 «.5S 



CAYUGA LAKE. JULY 30. 1918. 



34-- 

 113- 



/Chironomtis. . , 

 \Pontoporeiia. 

 Chironomus. . , 

 Pontoporeia . . 

 Oligochaeta. . 



133 

 178 



3,863 

 710 



1,388 



as- 7 

 64.0 

 784.4 

 355.6 

 416. 3 



•23 



•57 

 6.66 



2.2f 



3-70 



SENECA LAKE. AUG. i. 1918. 



33- 



47- 

 zio 

 173 



/Protenthes. . . 



\ Pontoporeia.. 

 Oligochaeta. . 

 Chironomus. . 

 Pontoporeia . 

 OUgochaeta. . 

 Chironomus.. 

 Pontoporeia., 

 Oligochaeta. , 

 Chironomus., 

 Pontoporeia., 

 OUgochaeta. . 



38.8 



399-6 



:, 692.8 



III. 7 



303.8 



439.7 



8s- 3 



137-8 



139. 3 



8-5 



47.8 



415.5 



.36 

 3.SS 

 15-07 



-99 

 3.70 

 3-8. 



.76 

 1. 14 



LIS 

 .07 



•43 



3.70 



GREEN LAKE. AUG. 30, 1918. 



45- 

 66. 



{Chironomus. 

 Protenthes. . 

 Pontoporeia 

 Oligochaeta. 

 {Chironomus . 

 Pontoporeia, 

 Oligochaeta. 



59 



IS 



6,883 



1,480 



407 



459 

 1.643 



27-7 



10.5 



9, 910. o 



488.4 

 181.3 

 661.0 

 542.3 



•25 



.09 



88.36 



4- 35 

 1.61 

 5-90 

 4-83 



36.6 

 9-7 



8,313.6 

 464. o 

 174.0 

 561. 3 

 515.1 



-34 



-08 

 74-93 

 4-13 

 I- 55 

 S-oo 

 4-S9 



