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 |