Growth Rate Potential of Juvenile Sockeye Salmon in Warmer and Cooler Years on the Eastern Bering Sea Shelf
Table 1
Equations and parameter description of the sockeye salmon bioenergetics model. Note that subscripts i and s represent year (i = 2000 to 2006) and station, and overbars denote mean quantities within the definitions of i.
Symbol
Equation and parameter description
Value
Source
Growth:
G
Growth rates (cal/s)
Proportion of food that can be metabolized (dimensionless)
0.7
1
I
Feeding rates (cal/s)
SMR
Standard metabolic rates (cal/s)
ACT
Activity costs (cal/s)
Consumption:
ED
Prey energy density (cal/)
Prey density (g/cm3)
Cross-sectional area of the reactive field (cm2)
U
Swimming speed (cm/s)
h
Handling time (s/g)
Cross-sectional area of the reactive field:
Intercept (cm2)
1
1
Coefficient, versus W
0.69
1
W
Sockeye salmon weight (g)
Handling time:
CA
Intercept for maximum feeding rates (g/s)
3
CB
Allometric exponent of maximum feeding rate
0.275
3
Temperature adjustment for maximum food consumption rates
T
Sea surface temperature (; 5 m below surface)
Temperature adjustment function:
3
3
3
3
3
3
Standard metabolic :
Intercept (cal/s)
4
Coefficient, SMR versus W
0.87
4
Coefficient, SMR versus
0.064
4
Swimming :
Intercept (cal · s-1)
4
Coefficient, ACT versus W
0.72
4
Coefficient, ACT versus U
1.6
4
Swimming speed:
Intercept (cm/s)
11.1
4
Coefficient, U versus W
0.097
4
Coefficient, U versus
0.040
4
(1) Reference [22]; (2) this study; (3) reference [27]; (4) reference [23]. The oxygen consumption rates were converted from mg O2/h to cal/s using an oxycalorific equivalent to 3.24 mg O2/cal [30].