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. 2021 Dec 8;9:e12608. doi: 10.7717/peerj.12608

Table 3. Summary for the Linear Mixed Effects (LME) models used to identify the influence of prey type on the pursuit time, handling time, gross energy intake, total energy expenditure and prey profitability for female Australian fur seals instrumented with video data loggers during the austral winter (May–August) between 2008–2017.

The reference prey group is ‘Benthic – Cephalopods’.

Model Covariates Est. SE t value Pr (>∣t∣)
log(Pursuit time) ∼ Prey type (Intercept) 3.73 0.19 20.15 <0.001
Benthic - Elasmobranchs 0.77 0.32 2.40 0.017
Benthic - Solitary fish −1.82 0.18 −9.95 <0.001
Benthic - Unknown −2.11 0.18 −11.46 <0.001
Demersal - Baitfish −1.85 0.34 −5.38 <0.001
Pelagic - Baitfish −2.84 0.27 −10.51 <0.001
Pelagic - Solitary fish −1.94 0.24 −7.90 <0.001
log(Handling time) ∼ Prey type (Intercept) 0.48 0.21 2.26 0.024
Benthic - Elasmobranchs 0.43 0.32 1.37 0.172
Benthic - Solitary fish 1.04 0.20 5.33 <0.001
Benthic - Unknown 0.68 0.20 3.47 0.001
Demersal - Baitfish 0.69 0.25 2.80 0.005
Pelagic - Baitfish 1.92 0.23 8.50 <0.001
Pelagic - Solitary fish 0.63 0.25 2.58 0.010
log(Energy gain) ∼  Prey type (Intercept) 7.31 0.26 28.53 <0.001
Benthic - Elasmobranchs −2.05 0.37 −5.59 <0.001
Benthic - Solitary fish −1.29 0.27 −4.81 <0.001
Demersal - Baitfish −0.54 0.33 −1.66 0.099
Pelagic - Baitfish −0.74 0.27 −2.69 0.009
Pelagic –Solitary fish −1.43 0.32 −4.53 <0.001
log(Energy expended) ∼  Prey type (Intercept) 3.17 0.29 10.98 <0.001
Benthic - Elasmobranchs −0.15 0.41 −0.37 0.712
Benthic - Solitary fish −0.94 0.31 −3.11 0.003
Demersal - Baitfish −0.14 0.37 −0.38 0.702
Pelagic - Baitfish 0.46 0.31 1.48 0.142
Pelagic –Solitary fish −1.83 0.36 −5.13 <0.001
log(Profitability) ∼  Prey type (Intercept) 2.98 0.30 9.88 <0.001
Benthic - Elasmobranchs −1.85 0.42 −4.39 <0.001
Benthic - Solitary fish −0.18 0.31 −0.59 0.555
Demersal - Baitfish 0.14 0.37 0.37 0.711
Pelagic - Baitfish 0.20 0.31 0.63 0.533
Pelagic –Solitary fish 0.72 0.36 1.98 0.051