Geoscience Reference
In-Depth Information
Control
Entire space
Inner region
Outer region
Radial spectra
Prey seeking
Entire space
Inner region
Outer region
Radial spectra
10
10
0
0
−
10
−
10
−
20
−
20
−
8
−
6
−
4
−
2 02
log
10
mass (kg)
−
8
−
6
−
4
−
2
02
log
10
mass (kg)
Both behaviours
Entire space
Inner region
Outer region
Radial spectra
Predator avoiding
Entire space
Inner region
Outer region
Radial spectra
10
10
0
0
−
10
−
10
−
20
−
20
−
8
−
6
−
4
−
2
02
−
8
−
6
−
4
−
2
02
log
10
mass (kg)
log
10
mass (kg)
Figure 2
Size spectra for different behaviours showing aggregated size spectra for
the entire space, the inner region and outer region and the size spectra at a transect of
spatial points.
significantly more slowly, with individuals 70 and 140 m away taking ap-
proximately 1.5 and 3 times longer, respectively, to grow to 1 kg than those at
the peak (
Table 2
). The different movement behaviours also influenced the
growth of individuals, but to a much lesser extent than the spatial origin of
the individual. Differences in the time taken to reach 1 kg varied by less than
5% over all movement behaviours (
Table 2
).
C. Parameter Sensitivities
The slope and intercept of the spatially aggregated size spectra were robust to
changes in the behavioural movement parameters (
Table 2
; slope
¼
1.04
2%, intercept
¼
7.22
0.5%) and movement behaviour (
Table 2
;
