Article: Modeling Behavior by Coastal River Otter (Lontra Canadensis) in Response to Prey Availability in Prince William Sound, Alaska: A Spatially-Explicit Individual-Based Approach.
Model simulation of fish school scenarios (top) and sensitivity analysis (bottom) parameter values (mean [μ], variance [σ], and degree of adjustment in parentheses).
Fish School Scenarios
Scenario
Model Adjustment
School_100%
Baseline (from data collected in 1996-1999) and spawning habitat
School_Random
Random placement with baseline availability
School_75%
-25% school availability and spawning habitat
School_50%
-50% school availability and spawning habitat
School_25%
-75% school availability and spawning habitat
School_None
No school availability and spawning habitat
Sensitivity Analysis
Adjusted Parameter
Parameter Adjustment
Lower
Upper
Movement Distance
μ = 847; σ = 1,558 (-10%)
μ = 1,035; σ = 1,904 (+10%)
Hrs Defecation
μ = 4.379; σ = 1.643 (-10%)
μ = 5.352; σ = 2.008 (+10%)
Hrs Active
μ = 1.418; σ = 1.379 (-10%)
μ = 1.734; σ = 1.685 (+10%)
Hrs Inactive
μ = 10.523; σ = 7.457 (-10%)
μ = 12.861; σ = 9.115 (+10%)
Scent Distance
-0.002 (-0.001)
-0.004 (+0.001)
Scent Decay Rate
0.001 (-0.099)
0.2 (+0.1)
Visual (m)
25 (-25m)
75 (+25m)
Memory (m)
500 (-500m)
1,500 (+500m)
Activity State (fish)
1.5 (-0.5)
2.5 (+0.5)
Defecation (fish)
1.5 (-0.5)
2.5 (+0.5)
Each simulation scenario was replicated 100 times.
