608 
Fishery Bulletin 96(3), 1998 
Table 3 
Growth rates (mean ± standard error) of Atlantic sturgeon during the laboratory experiment. Growth rates in weight and length 
are instantaneous rates. Absolute growth rates in weight is presented under the heading mg/d. Experiments are labeled accord- 
ing to the temperature level and whether tanks were sealed or unsealed (unsealed tanks permitted access by sturgeon to surface 
water). Dissolved oxygen (DO) levels, low and high, refer to prescribed levels of 3 mg/L and 7 mg/L, respectively, n = number of 
individuals in each tank. Rep. = replicate(s). 
Experiment 
DO 
level 
Rep. 
Growth rate in 
weight (per day) 
mg/d 
Growth rate in 
length (per day) 
n 
26°C unsealed 
Low 
1 
0.023 ± .006 
0.345 ± 0.094 
~0 
2 
2 
0.013 ± 0.003 
0.202 + 0.056 
~0 
6 
3 
0.006 ± 0.005 
0.093 ± 0.062 
0.003 ± 0.001 
4 
4 
0.029 ± 0.019 
0.324 ± 0.192 
0.003 ± 0.001 
8 
High 
1 
0.037 ± 0.004 
0.524 ±0.076 
0.010 ± 0.001 
8 
2 
0.037 ± 0.006 
0.643 + 0.116 
0.012 + 0.002 
8 
3 
0.036 ± 0.007 
0.587 + 0.112 
0.012 ± 0.002 
8 
4 
0.036 ± 0.004 
0.789 ± 0.117 
0.015 ± 0.001 
8 
26°C sealed 
Low 
1 
Lethal 
0 
2 
Lethal 
0 
High 
1 
0.029 ± 0.001 
2.220 ± 0.059 
0.006+ 0.001 
6 
2 
0.025 ± 0.001 
2.015 ± 0.178 
0.007 ± 0.001 
6 
19°C unsealed 
Low 
1 
0.013 ± 0.002 
0.185 ± 0.029 
0.005 ± 0.001 
7 
2 
0.011 ± 0.003 
0.129+ 0.037 
0.005+ 0.001 
7 
High 
1 
0.050 ± 0.005 
0.721 ± 0.057 
0.014+0.001 
8 
2 
0.045 ± 0.002 
0.719+0.044 
0.015+0.001 
8 
19°C sealed 
Low 
1 
0.003 ± 0.001 
0.072+ 0.030 
0.004 ± 0.001 
8 
2 
0.003 ± 0.001 
0.071 ± 0.031 
0.004+ 0.001 
8 
High 
1 
0.028 ± 0.003 
1.887 ± 0.253 
0.009 + 0.001 
6 
2 
0.031 ± 0.002 
2.270 + 0.197 
0.008 ± 0.001 
6 
Table 4 
Nested analysis of variance of surface access, temperature, oxygen level, replicate and individual effects on growth rate. Initial 
weight was used as a covariate in the analyses. Sealed refers to whether tanks were sealed or unsealed (unsealed tanks permitted 
access by sturgeon to surface water). Designated temperature and oxygen levels were 19°C and 26°C, and 3 mg/L and 7 mg/L, 
respectively. Factors in parentheses indicate the nesting procedure. For example “Oxygen (Sealed-Temperature)” refers to vari- 
ance explained by oxygen level nested within combinations of surface access and temperature. 
Type of 
Sum of 
Significance 
variable Variable 
df 
squares 
level ( P ) 
Instantaneous growth rate in weight 
Covariate Initial weight 
1 
0.3892 
0.0001 
Class variables Sealed 
1 
0.0392 
0.019 
Temperature (sealed) 
2 
0.0086 
0.54 
Oxygen (sealed-temperature) 
3 
0.0981 
0.0039 
Tank (sealed-temperature-oxygen) 
7 
0.0097 
0.99 
Individual (sealed-temperature-oxygen-tank) 
14 
0.0077 
0.99 
Absolute growth rate in weight 
Covariate Initial weight 
1 
0.0839 
0.0001 
Class variables Sealed 
1 
0.0445 
0.0001 
Temperature (sealed) 
2 
0.0523 
0.0002 
Oxygen (sealed-temperature) 
3 
0.7734 
0.0001 
Tank (sealed-temperature-oxygen) 
7 
0.0293 
0.17 
Individual (sealed-temperature-oxygen-tank) 
14 
0.0194 
0.92 
