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given the preservation of favourable temperature conditions. In other words, trav-
eling of migrating species takes place at velocities characteristic for them in the
direction of the maximum gradient of effective food, given the adherence to tem-
perature restrictions.
The PCEM makes it possible to carry out computer experiments for an esti-
mation of the PCE response to anthropogenic impacts on the exterior conditions or
to climate change. The initial data and model coef
cients are given in Table 4.4 . For
the young and commercial anchovy the temperatures
˃ ≤
289 K and for predatory
fish migration was
determined by the value of 0.03 m/s, and for birds 0.14 m/s. The thermocline
position was described by the binary function ( 4.49 )with
shes
˃ ≥
288 K were deemed to be acceptable. The rate of
ʴ
=
ʴ s in spring, summer
Table 4.4 The PCEM coefficients used for simulation experiments
Coef cient
Value
Coef cient
Value
Coef cient
Value
k 1,10
0.3
ˉ
0.7
ʽ
2
0.1
8
k 1,13
0.3
ˉ 9
0.9
ʻ 95
0.02
10 2
k 1,14
5.0
k 5,6
0.5
×
ʻ
0.02
56
k 2,12
100.0
k 5,7
0
ʻ
0.02
69
0.5 × 10 2
k 2,14
5.0
k 5,9
ʽ 10
50.0
10 2
k 3,1
0.2
k 5,10
0.5
×
ˁ
3.0
10 4
k 3,2
0.05
k 5,14
5.0
ˁ
1
ʴ 12
k 3,10
0.005
k 6,1
0.05
0.012
10 3
k 3,13
0.5
×
k 6,2
0.3
k 13,0
0.9
k 3,14
5.0
k 6,3
0.1
ʴ
0.01
14
k 4,1
0.1
k 6,4
0.1
W 14
0.03
k 4,2
0.05
k 6,6
0.05
k 9,2
0.1
10 3
k 4,3
0.3
k 6,10
0.5
×
k 9,3
0.1
k 4,4
0.05
k 6,14
5.0
k 9,4
0.1
0.5 × 10 2
k 4,6
0.04
k 7,2
k 9,5
0.01
10 3
k 4,10
0.5
×
k 7,3
0.05
k 9,10
0.001
10 3
k 4,13
0.5
×
k 7,4
0.1
k 9,14
5.0
k 4,14
5.0
k 7,5
0.3
k 9,9
0.1
k 5,2
0.2
k 7,6
0.1
ʳ′
0.1
8
k 5,3
0.1
k 7,7
0.1
ʱ
0.013
k 5,4
0.05
k 7,9
0.2
t 1
0.2
0.5 × 10 2
k 5,5
k 7,10
0.1
t 1 ′′
0.2
h 3
0.265
k 7,14
5.0
ˉ
2
1.0
h 4
0.2293
k 8,5
0.1
ˉ
3
1.0
h 5
0.14
k 8,6
0.1
ˉ 4
1.0
h 6
0.15
k 8,7
0.1
ˉ
5
0.9
h 7
0.13
k 8,9
0.1
ˉ
6
0.9
ˉ 7
h 8
0.1
k 8,10
0.01
0.9
h 9
0.14
ˉ
1.0
-
-
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