TABLE 4.—Numbers, ages, and total weights in kilograms of bluegills restocked followin 
ub yal 
bers, ages, and weights recovered in the fall census of 
g the 1970 fall census, with num- 
Recovered in October, 1971 
Stocked in October, 1970 ea 
See SAL Ment we Ay 
Age 0 Older 
Pond Total 
Number Number Weight Number Weight Weight 
1 13,456 2.39 324 34.61 37.00 
2 Baloo 1.97 256 22.69 24.66 
3 14,631 PR 264 26.33 33.56 
4 6,151 2.01 264 27.76 29.77 
6 6,560 0.88 338 25.36 26.24 
14 6,827 2.87 293 31.46 34.33 
Age 0 Older 
Total 
Number Weight Number Weight Weight 
13,343 85.05 308 54.64 139.69 
15,471 74.00 252 38.01 112.01 
41,768 42.86 251 43.26 86.12 
14,937 87.30 244 41.97 (OPH 
56,538 31.32 804 44.87 76.19 
19,199 59.25 266 45.42 104.67 
TABLE 5.—Numbers, ages, and total weights in kilograms of largemouth bass restocked following the 1970 fall census, 
with numbers, ages, and weights recovered in the fall 
census of 1971. 
= SSS ais lr stile 
Stocked in October, 1970 
Recovered in October, 1971 
Age 0 Older Age 0 Older 
Pond Total Total 
Number Number Weight Number Weight Weight Number Weight Number Weight Weight 
il 5 0.32 34 13°74 14.06 644 6.48 39 19.39 25.87 
2 3 0.09 50 15.47 15.56 2,519 9.87 61 23.46 Beisase) 
3 20 0.68 56 18.54 19.22 263 14.85 55 27.87 42.72 
4 0 59 12.47 12.47 ie ys 4.82 59 17.76 22.58 
6 0 53 11.85 11.85 129 2.12 49 23.00 2512 
if 0 19 15.39 15.39 
2,564 10.32 68 28.67 38.99 
elieve that the standing crops listed in 1971 are 
eliable and complete for all species. 
With few exceptions, operating procedures in 1971 
vere much the same as in the previous year. The 
aged channel catfish populations were sampled only 
very 30 days in order to minimize loss of fish through 
landling in hot weather, and because it was not 
ssential to our primary interest to achieve the most 
ficient feeding regime. Rations were increased on 
he basis of anticipated rates of conversion. An addi- 
ional change in 1971 was that all cages were relined 
vith nylon netting to prevent loss of fish through de- 
rioration of the original wire netting. 
lesults 
Standing crops of all three species were much 
ger in this second year (Tables 1 and 2), clearly 
stablishing the hypothesis that carrying capacities 
ad not been achieved in the first growing season. 
For bluegills, substantial increases occurred in the 
‘eights of both Age 0 and older fish. Largest weights 
both groups of bluegills occurred in the weedless 
ond where they were associated with caged and 
neaged channel catfish. Table 6 shows that standing 
‘ops of bluegills in 1971 averaged highest in those 
onds containing both caged and uncaged catfish, 
ere intermediate when with bass only, and lowest 
hen with bass and caged catfish; however, the dif- 
ferences were not significant at the .05 level. The only 
observable interaction between bluegills and catfish 
involved uncaged catfish and Age 0 bluegills. Table 
6 shows that the lowest average number but the high- 
est average weight of Age 0 bluegills occurred in 
those ponds where they were intermixed with uncaged 
catfish, suggesting that substantial numbers of young 
bluegills were eaten by the catfish. Table 6 also 
shows that only very minor differences occurred in 
either number or weights of older bluegills in the 
three types of populations. It appears evident that 
the association with catfish placed no serious limita- 
tions upon bluegill production, and that poundages 
may actually have been increased either through (1) 
thinning of the young, (2) utilization by the sur- 
vivors of food intended for the catfish, or (3) enrich- 
ment of the environment through the addition of the 
catfish food. 
Total weights of bass showed an average increase 
of more than 100 percent in 1971 over 1970, again 
emphasizing that carrying capacities had not been 
achieved in the previous growing season. Age 0 bass 
were present in all populations, and increases occurred 
in weights and numbers of both Age 0 and older fish. 
In 1971 the average difference in standing crops of 
bass sharing ponds with bluegills only, and of bass 
in ponds with bluegills and both caged and uncaged 
catfish was 7.06 pounds (3.20 kilograms), and in all 
5 
