212 ^ PACIFIC SCIENCE, Vol. VIII, April, 1954 
TABLE 1 (Continued) TABLE 1 (Continued) 
SPECIES 
CC. OF 02 PER 
LITER 
PERCENTAGE 
OF OXYGEN 
CONSUMED 
SPECIES 
CC. OF O 2 PER 
LITER 
PERCENTAGE 
OF OXYGEN 
CONSUMED 
Inflow 
Outflow 
Inflow 
Outflow 
1.98 
1.71 
13.9 
1.85 
1.41 
23.8 
1.59 
1.36 
14.5 
1.85 
1.41 
23.8 
1.45 
1.27 
12.4 
1.61 
1.22 
24.2 
1.31 
1.15 
12.2 
1.61 
1.22 
24.2 
1.28 
1.00 
21.9 
Phymodius ungulatus 
4.53 
3.75 
17.2 
1.28 
1.00 
21.9 
Weight 
4.53 
3.89 
14.1 
12.5 grams 
3.46 
3.12 
9.8 
Podophthalmus vigil 
4.02 
3.68 
8.5 
Temperature 
3.12 
2.90 
7.1 
Weight 
3.93 
3.59 
8.7 
26.8°C. 
2.98 
2.86 
4.0 
10.0 grams 
3.16 
2.73 
13.6 
2.93 
2.59 
11.6 
Temperature 
3.02 
2.59 
14.1 
2.93 
2.55 
13.0 
26.5-26.8°C. 
2.95 
2.56 
13.2 
2.66 
2.33 
12.4 
2.63 
2.29 
12.9 
2.46 
2.03 
17.5 
2.48 
2.16 
12.9 
2.35 
1.78 
24.3 
2.33 
1.96 
15.5 
1.78 
1.28 
28.1 
2.13 
1.87 
12.2 
1.50 
1.30 
13.3 
1.99 
1.67 
16.1 
1.34 
1.16 
13.4 
1.79 
1.53 
14.5 
1.60 
1.36 
15.0 
Weight 
4.56 
3.92 
14.0 
1.41 
1.19 
15.6 
11.9 grams 
4.41 
3.77 
14.5 
1.38 
1.10 
20.3 
Temperature 
3.59 
3.23 
10.0 
1.34 
0.98 
26.9 
26.5-26.8°C 
3.59 
3.26 
9.2 
2.92 
2.51 
14.0 
Weight 
4.53 
4.19 
7.5 
2.71 
2.35 
13.3 
11.1 grams 
4.11 
3.76 
8.5 
2.60 
2.26 
13.0 
Temperature 
3.78 
3.41 
9.8 
2.38 
1.92 
19.3 
26.3-26.6°C. 
3.09 
2.68 
13.3 
2.33 
1.85 
20.6 
3.00 
2.64 
12.0 
1.85 
1.52 
17.8 
2.73 
2.36 
13.6 
1.61 
1.38 
14.3 
2.38 
2.08 
12.6 
1.61 
1.39 
13.7 
2.25 
1.97 
12.0 
1.28 
1.11 
13.3 
2.01 
1.74 
13.4 
1.85 
1.57 
15.0 
Platypodia granulosa 
4.53 
3.57 
21.2 
1.75 
1.50 
14.3 
Weight 
4.53 
3.42 
24.5 
1.54 
1.31 
14.9 
6.0 grams 
3.46 
2.88 
16.8 
1.43 
1.40 
16.1 
Temperature 
3.12 
2.58 
17.3 
1.32 
0.99 
25.0 
26.8°C 
2.98 
2.57 
13.8 
1.20 
0.97 
19.1 
2.93 
2.40 
18.1 
1.17 
0.98 
16.2 
2.93 
2.53 
13.7 
2.66 
2.14 
19.5 
2.53 
2.18 
13.8 
DISCUSSION AND CONCLUSIONS 
2.46 
2.05 
16.7 
2.35 
1.72 
26.8 
With respect to adaptation in the consump- 
1.78 
1.50 
1.35 
1.14 
24.2 
24.0 
tion of oxygen, two main groups of animals 
1.34 
0.98 
26.9 
can be distinguished: (1) those animals which 
show a regulation and (2) those showing an 
Weight 
6.3 grams 
4.56 
4.41 
3.48 
3.49 
23.7 
20.9 
adjustment. The first group possesses mechan- 
Temperature 
3.59 
2.97 
17.3 
isms which permit the consumption of con- 
26.5-26.8°C. 
2.92 
O ”71 
2.41 
17.5 
^’7 f\ 
stant quantities of oxygen per unit of time, 
Z. /i 
2.60 
Z.Zj 
2.18 
i /,U 
16.2 
even when the oxygen tension varies mark- 
2.33 
1.70 
27.0 
edly. They therefore actively regulate their 
2.33 
1.71 
26.6 
respiration. The second 
group is ' unable to 
