8190

• UCREFRP Catalog Number: 8190
• Author: Papoulias, D. and W. L. Minckley
• Title: Effects of Food Availability on Survival and Growth of Larval Razorback Suckers in Ponds
• USFW Year: 1992
• USFW - Doc Type: Transactions of the American Fisheries Society
• Copyright Material: YES

FEEDING BY LARVAL RAZORBACK SUCKERS 343
TABLE 1.-Means ± SEs for chlorophyll index, invertebrate biovolume, and number of invertebrates in ponds
fertilized at low, medium and high levels (N = 3 per treatment). When analysis of variance yielded a significant
F-value (ANOVA; P < 0.05*), treatment means were subjected to Tukey's HSD procedure; in these cases, means
without a letter in common are significantly different (P < 0.05).
Week and Chlorophyll index Invertebrate biovolume Invertebrate number (n)
treatment mm3/m3 ANOVA Mg/M3 ANOVA n/L ANOVA
0 F= 0.73,
P = 0.36
Lowa
Medium 1.3 ± LO
High 2.1 ± 3.6
1 F = 8.5 1, F = 0.87,
P = 0.01• P = 0.46
Low 1.0±0.9z 15±12 5±3
Medium 5.6±4.6y 5±3 t+0
High 31.8±19.5x 3±I 1±0.1
2b F = 0.84, F = 2.70,
P = 0.46 P = 0.11
Low 9.2±7.5 164±75 14±8z
Medium 24.0 ± 21.1 20 ± 12 11 ± 5 z
High 27.9 ± 30.3 84 ± 67 45 ± 32y
3b F= 0.85,
P = 0.46
Low 6A±4.5 35±14 7±2z
Medium 14.5 ± 14.7 54 ± 39 8 ± 4 z
High 8.8 ± 7.4 1,430 ± 248 59 ± 6 y
4 F=0.43, F=2.31,
P=0.66 P=0.18
Low 2.9±1.1 168±66 22±6z
Medium 3.6 ± 1.8 504 ± 164 56 ± 8 y
High 4.3 ± 3.1 1,624 ± 555 68 ± 15 y
5 F= 0.90, F= 3.53,
P=0.45 P=0.10
Low 1.3±0.4 410±285 16±5
Medium 2.1 ± 0.3 535 ± 89 50 ± 27
High 1.4 ± 0.9 3,936 ± 1,970 49 ± 9
6 F= 3.72, F= 2.74,
P=0.06 P=0.14
Low 0.1±0.1 196-110 12±4
Medium 0.1 ± 0.1 1,012 ± 976 31 ± 21
High 0.3 ± 0.2 9,659 ± 5,404 73 ± 38
7 F= 0.0 1, F= 1.49,
P=0.99 P=0.25
Low 0.3 ± 0.3 1,059 ± 808 13 ± 6
Medium 0.3 ± 0.3 350 ± 97 11 ± 6
High 0.2 ± 0.4 439 ± 189 8 ± 1
8` F = 0.66,
P = 0.43
Low 0.8 ± 0.1
Medium 0.8 ± 0.6
High 0.6 ± 0.4
I Low treatment was not sampled.
b Invertebrate data for weeks 2 and 3 were analyzed together, N = 5; joint ANOVA results are given with week 2
® Biovolume and numbers of invertebrates were not sampled.
F= 1.09,
P = 0.38
F = 5.00,
P = 0.03*
F = 4.95,
P = 0.05*
F= 1.41,
P = 0.31
F= 1.57,
P = 0.28
F= 0.55,
P = 0.59
val lengths and weights began diverging among were significantly larger (except at week 7), but
treatments at week 3 (Table 2; Figure 3). Larvae not heavier, than those in low-fertilization ponds
were then consistently larger (except in week 7) from week 3 through week 8. Larvae did not differ
and heavier in high- than in low-fertilization statistically in size between high- and medium-
ponds. Larvae in medium-fertilization treatments fertilization treatments.