469 
was of little importance by comparison with the very high weed-fauna 
figures from these lakes, the combined bottom and weed fauna averages 
(if Crane Lake be excepted) apparently including a supply sufficient for 
not less than 25 to 30 months. (See table, p. 470.) 
BoTttoM AND SHORE FAUNA AS Foop ror FISHERY 
1. Intinors River, Juty—Ocrorer, 1915 
Italic figures=months’ supply, at 83 lbs. per month, for 9 months’ growing 
season for fish-weight-increment of 150 lbs. per acre, feeding ratio 5:1. 
. | Months’ supply 
Bottom fauna remaining on 
Miles all-zone av. date of col- 
lbs. per acre lection* 
Chillicothe—Copperas Cr. dam 43.7 264 3.1 
Copperas Cr. dam—Lagrange 59.3 | 705 8.5 
Copperas Cr. dam—Havana 16.8 2,693 | 32.4 
Havana—Lagrange 42.5 83 | 1.0 
Lagrange-—Grafton (7.5 10.4 0.1 
Chillicothe—Grafton 180.5 261 3.1 
HypoTHETICAL FISH-YIELDS FOR THE RIVER AND LAKE ACREAGE BE- 
TWEEN CopPERAS CREEK DAM AND LAGRANGE, ON Basis oF BoTtoM- 
AND SHORE-FAUNA StTocKs oF JuLY—OcrTopeEr, 1914—1915 
In the table on page 471 are shown figures representing the po- 
tential value in fish, at the Walter ratio (5:1), of the bottom- and 
shore-fauna stocks remaining unconsumed in the central rich district 
between Copperas Creek dam and Lagrange July—October, 1914—1915, 
after 5 to 8 months of feeding. The total hypothetical yield of the un- 
consumed stocks of food thus figured (16,103,580 Ibs. of fish, from 
80,517,900 lbs. bottom and shore animals), is greater by about 50% than 
the actual fish catch of 1908 (a,banner year) in the same district. Of 
this total, 831,900 lIbs., or 141 Ibs. per acre, accrues from about 6,000 
acres of river, bearing over 4,000,000 Ibs. of small bottom animals; and 
15,271,680 lbs., or 289 Ibs. per acre, from about 52,000 acres of lakes and 
other backwaters, bearing not less than 76,000,000 Ibs. of small bottom- 
and shore-animals, of which over 60,000,000 Ibs. comes from the upper 
levels in the shallower, more densely weeded acreage. 
* Dates of collection, July—October (after 5 to 8 months’ feeding). 
