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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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