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Table 3 General additive mixed models (GAMMs) fitted to explain the diel and environmental drivers of Overall Dynamic Body Acceleration (ODBA) of California horn sharks (Heterodontus francisci)

From: Active acoustic telemetry tracking and tri-axial accelerometers reveal fine-scale movement strategies of a non-obligate ram ventilator

Model

Family

Sampling Window (min)

Resample Function

Correlation at lag 1

Degrees of freedom

F-statistic

p value of smoother

ODBA ~ s(Time of Day)

Gaussian

5

Mean

0.736

4.137

2.182

0.0006

ODBA ~ s(Temperature)

Gaussian

5

Mean

0.954

3.243

3.396

0.0108

ODBA ~ s(Depth)

Gaussian

5

Mean

0.731

6.217

6.895

< 0.0001

  1. All GAMMs were performed on nighttime hours only (local sunset to sunrise) and included individual as a random factor. Significant fits are shown in bold; note that p-values of smoothers in GAM models fitted with mgcv are considered significant when p < 0.01 (Wood 2006). The correlation at lag 1 was determined by an autocorrelation function (ACF) and was included in the model to specify the autocorrelation term. Degrees of freedom are estimated by the mgcv package in R
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Movement Ecology

ISSN: 2051-3933