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.

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Albeke SE; Nibbelink NP; Ben-David M
PLoS ONE, 2015

10.1371/journal.pone.0126208.t002

Table 2 Parameters, associated values and statistical distributions (for random value selection) used for simulation initialization and model run-time for all scenarios, unless altered for the sensitivity analysis (<xref ref-type="table" rid="pone.0126208.t001">Table 1</xref>).

Parameter	Value	Distribution	Description
Model Initialization
Otter Density	55-78	Uniform	Minimum-Maximum 95% CI from density estimates [76]
Fish Schools	40-98	Uniform	Minimum-Maximum number of fish schools [37]
Gender Ratio	0.69	-	Percent of males in the population [76,77,78]
Female 50% Core Home Range	4 (2)	Normal	Mean (SD), in km, of female 50% Core Home Range [71]
Habitat Quality Threshold	0.464	-	Threshold probability value predicting otter latrine site [61]
Activity Threshold	0.122	Bernoulli	Probability of otter being in active-state (ratio of mean Active:Inactive hours; S1 Text, S1 Dataset)
Active Upper CI	1.88	Uniform	Upper 95% CI value of mean active-state hours (S1 Text, S1 Dataset)
Inactive Upper CI	15.32	Uniform	Upper 95% CI value of mean inactive-state hours (S1 Text, S1 Dataset)
Model Run-time
Movement Distance	941 (1731)	Normal	Mean (SD), in meters, of 8 telemetered otters (S1 Text, S2 Dataset)
Hours Between Defecating	4.865 (1.825)	Normal	Mean (SD) hours between defecation events for captive otters in a 24hr period [79]
Hours in Active-state	1.433 (1.393)	Normal	Mean (SD) hours of continuous activity of 8 telemetered otters (S1 Text, S1 Dataset)
Hours in Inactive-state	11.692 (8.286)	Normal	Mean (SD) hours of continuous inactivity of 8 telemetered otters (S1 Text, S1 Dataset)
Scent Distance Decay Rate	-0.003	Bernoulli	Parameter estimate in negative exponential equation (S1 Text eq. 5) calculating probability of detecting scent-mark given a distance
Feces Desiccation Rate	0.1	Bernoulli	Parameter estimate in exponential equation (S1 Text eq. 5) calculating expected amount of desiccation (unitless value) given the age, in hours, of the fecal deposit
Visual Perception Distance	50	-	Assumed visual distance, in meters, at which the otter is acutely aware of the biotic and abiotic conditions of its surroundings
Memory Perception Distance	1000	-	Assumed memory distance, in meters, at which the otter can perfectly recall the best (MEP) available habitat
Active/Inactive-Satiation Scaler	2	Bernoulli	A scaling factor that increases (if Active) or decreases (if Inactive) the probability that an otter will switch activity-states if it has foraged on a school of fish (S1 Text eqs. 3 and 4)
Defecation-Satiation Scaler	2	Bernoulli	A scaling factor to increase the probability of a defecation event if the otter has foraged on a school of fish (S1 Text eq. 1).
Number of Fish Schools/day	-	-	Number of fish schools interpreted from Brown et al. [44] and Blundell et al. [35] (S1 Text eq. 7)

Specific descriptions and model processes can be found in S1 Text.

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Neuron Type	Neuron Description	Ephys Prop	Extracted Value	Standardized Value	Content Source