north east region...north east region river south esk sac: grade 2 summarytable percentage chance...
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North East Region
River South Esk SAC: Grade 2
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
2.84 2,027,900 5,757,312 80.6 86.08 77.58 66.52 66.07 75.37 2a Figures presented are median values
1
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
50
100
150
200
0
50
100
150
200
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
−1.0
−0.5
0.0
0.5
−1.0
−0.5
0.0
0.5
Month
Adj
uste
d F
low
2
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
500
1,000
1,500
0
500
1,000
1,500
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
2,000
4,000
6,000
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
4
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
500
1,000
0
500
1,000
0
500
1,000
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
5
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
2,000,000
4,000,000
0
2,000,000
4,000,000
0
2,000,000
4,000,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
5,000,000
10,000,000
15,000,000
20,000,000
25,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
6
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 2,281,060 square meters of known salmon habitat in the River South EskSAC and a further 23,422 square meters where salmon may be present.
Egg requirement
0
10,000,000
20,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 80.602016 86.082017 77.582018 66.522019 66.07
7
0
10,000,000
20,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
8
River North Esk: Grade 1
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
8.27 2,310,600 19,104,783 99.48 98.97 96.91 43.9 84.21 84.69 1a Figures presented are median values
9
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
100
200
300
400
0
100
200
300
400
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
−0.5
0.0
0.5
−0.5
0.0
0.5
Month
Adj
uste
d F
low
10
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
0
1,000
2,000
3,000
0
1,000
2,000
3,000
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
3,000
6,000
9,000
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
11
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
12
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0500
1,0001,5002,000
0500
1,0001,5002,000
0500
1,0001,5002,000
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
13
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
2,000,000
4,000,000
6,000,000
0
2,000,000
4,000,000
6,000,000
0
2,000,000
4,000,000
6,000,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
10,000,000
20,000,000
30,000,000
40,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
14
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 2,589,901 square meters of known salmon habitat in the River North Esk anda further 35,777 square meters where salmon may be present.
Egg requirement
0
10,000,000
20,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 99.482016 98.972017 96.912018 43.902019 84.21
15
0
10,000,000
20,000,000
30,000,000
40,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
16
Bervie Water: Grade 3
Detailed information on catches is not publicly available for this assessment area
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
1.14 226,900 259,409 6.16 8.93 36.76 3.94 42.46 19.65 3a Figures presented are median values
17
1. Converting Reported Catches to Numbers of Returning Salmon
Annual estimated stock
0
25
50
75
100
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
18
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
Total annual egg numbers
0
100,000
200,000
300,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
19
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 247,541 square meters of known salmon habitat in the Bervie Water and afurther 10,307 square meters where salmon may be present.
Egg requirement
0
1,000,000
2,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 6.162016 8.932017 36.762018 3.942019 42.46
20
0
1,000,000
2,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
21
Carron Water: Grade 3
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
2.68 57,300 153,358 0 0 0 0 0 0 3a Figures presented are median values
22
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov−0.050
−0.025
0.000
0.025
0.050
Month
Rep
orte
d ca
tch
Monthly flow data
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
−0.5
0.0
0.5
Month
Adj
uste
d F
low
23
Monthly stock estimates (out of season in black)
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov−0.050
−0.025
0.000
0.025
0.050
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
−0.050
−0.025
0.000
0.025
0.050
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
24
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
25
Monthly number of spawning females
2015 2016 2017
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
−0.050
−0.025
0.000
0.025
0.050
−0.050
−0.025
0.000
0.025
0.050
−0.050
−0.025
0.000
0.025
0.050
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
26
Monthly number of eggs
2015 2016 2017
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
−0.050
−0.025
0.000
0.025
0.050
−0.050
−0.025
0.000
0.025
0.050
−0.050
−0.025
0.000
0.025
0.050
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
−0.050
−0.025
0.000
0.025
0.050
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
27
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 48,140 square meters of known salmon habitat in the Carron Water and afurther 16,935 square meters where salmon may be present.
Egg requirement
0
200,000
400,000
600,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 -2016 -2017 -2018 -2019 -
28
0
200,000
400,000
600,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
29
Cowie Water: Grade 3
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
3.07 127,300 391,018 16.8 0.81 33.05 6.18 1.61 11.69 3a Figures presented are median values
30
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.0
5.0
10.0
0.0
5.0
10.0
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
−1.0
−0.5
0.0
0.5
−1.0
−0.5
0.0
0.5
Month
Adj
uste
d F
low
31
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
20
40
60
0
20
40
60
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
25
50
75
100
125
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
32
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
33
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
010203040
010203040
010203040
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
34
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
50,000
100,000
150,000
0
50,000
100,000
150,000
0
50,000
100,000
150,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
100,000
200,000
300,000
400,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
35
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 141,768 square meters of known salmon habitat in the Cowie Water and afurther 2,859 square meters where salmon may be present.
Egg requirement
0
500,000
1,000,000
1,500,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 16.802016 0.812017 33.052018 6.182019 1.61
36
0
500,000
1,000,000
1,500,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
37
River Dee SAC: Grade 1
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
3.05 9,261,200 28,215,587 82.07 91.29 93.76 89.65 83.21 88 1a Figures presented are median values
38
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
500
1,000
0
500
1,000
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
−1.0
−0.5
0.0
0.5
−1.0
−0.5
0.0
0.5
Month
Adj
uste
d F
low
39
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
5,000
10,000
15,000
0
5,000
10,000
15,000
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
20,000
40,000
60,000
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
40
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
41
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
5,000
10,000
0
5,000
10,000
0
5,000
10,000
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
42
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
20,000,000
40,000,000
60,000,000
0
20,000,000
40,000,000
60,000,000
0
20,000,000
40,000,000
60,000,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
50,000,000
100,000,000
150,000,000
200,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
43
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 10,214,141 square meters of known salmon habitat in the River Dee SAC anda further 309,956 square meters where salmon may be present.
Egg requirement
0
50,000,000
100,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 82.072016 91.292017 93.762018 89.652019 83.21
44
0
50,000,000
100,000,000
150,000,000
200,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
45
River Don: Grade 3
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
2.32 4,112,800 9,560,190 53.68 51.6 42.95 45.65 70.03 52.78 3a Figures presented are median values
46
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
100
200
0
100
200
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov
−1.0
−0.5
0.0
0.5
−1.0
−0.5
0.0
0.5
Month
Adj
uste
d F
low
47
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
500
1,000
1,500
0
500
1,000
1,500
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
2,000
4,000
6,000
8,000
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
48
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
49
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
500
1,000
1,500
0
500
1,000
1,500
0
500
1,000
1,500
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
50
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
2,000,000
4,000,000
6,000,000
0
2,000,000
4,000,000
6,000,000
0
2,000,000
4,000,000
6,000,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
5,000,000
10,000,000
15,000,000
20,000,000
25,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
51
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 4,373,313 square meters of known salmon habitat in the River Don and afurther 300,299 square meters where salmon may be present.
Egg requirement
0
10,000,000
20,000,000
30,000,000
40,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 53.682016 51.602017 42.952018 45.652019 70.03
52
0
10,000,000
20,000,000
30,000,000
40,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
53
River Ythan: Grade 3
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
2.45 585,100 1,430,731 50.81 32.17 47.58 40.24 21.62 38.48 3a Figures presented are median values
54
1. Converting Reported Catches to Numbers of Returning Salmon
Reported Catches (black = retained, blue = released)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
20
40
60
80
0
20
40
60
80
Month
Rep
orte
d ca
tch
Monthly flow data
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov−1.5
−1.0
−0.5
0.0
0.5
1.0
−1.5
−1.0
−0.5
0.0
0.5
1.0
Month
Adj
uste
d F
low
55
Monthly stock estimates (out of season in black)
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0
100
200
300
0
100
200
300
Month
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Annual estimated stock
0
200
400
600
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
56
Annual catch as a proportion of stock
0.00
0.25
0.50
0.75
1.00
2015 2016 2017 2018 2019Year
Rep
orte
d ca
tch
/ Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
57
Monthly number of spawning females
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
050
100150200
050
100150200
050
100150200
Month
Est
imat
ed A
bund
ance
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
58
Monthly number of eggs
2015 2016 2017 2018 2019
1SW
2SW
3SW
Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct Jan Apr Jul Oct
0
200,000
400,000
600,000
0
200,000
400,000
600,000
0
200,000
400,000
600,000
Month
Est
imat
ed N
umbe
r of
Egg
s
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
Total annual egg numbers
0
500,000
1,000,000
1,500,000
2,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
59
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 613,162 square meters of known salmon habitat in the River Ythan and afurther 51,709 square meters where salmon may be present.
Egg requirement
0
2,000,000
4,000,000
6,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 50.812016 32.172017 47.582018 40.242019 21.62
60
0
2,000,000
4,000,000
6,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
61
River Ugie: Grade 3
Detailed information on catches is not publicly available for this assessment area
Summary Table
Percentage chance meeting requirement
Eggs required(m2)a
Area(m2)a
Total eggrequirementa 2015 2016 2017 2018 2019 Overall Grade
2.02 541,200 1,091,448 57.94 69.97 37.51 38.61 28.92 46.59 3a Figures presented are median values
62
1. Converting Reported Catches to Numbers of Returning Salmon
Annual estimated stock
0
250
500
750
2015 2016 2017 2018 2019Year
Est
imat
ed s
tock
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
2. Converting Numbers of Returning Salmon to Numbers of Spawning Females
Ages of fish
2018 2019
2015 2016 2017
Jan Mar May Jul Sep Nov Jan Mar May Jul Sep Nov
Jan Mar May Jul Sep Nov0.00
0.25
0.50
0.75
1.00
0.00
0.25
0.50
0.75
1.00
Month
Pro
port
ion
of s
alm
on
1sw
2sw
3sw
63
3. Converting Number of Spawners to Number of Eggs
Egg contents of females
2018 2019
2015 2016 2017
Jan MarMay Jul Sep Nov Jan MarMay Jul Sep Nov
Jan MarMay Jul Sep Nov0
5000
10000
15000
0
5000
10000
15000
Month
Num
ber
of e
ggs
age
1sw
2sw
3sw
Total annual egg numbers
0
1,000,000
2,000,000
3,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars).
64
4. Egg requirement
Areas of salmon habitat in square meters
There is an estimated 468,597 square meters of known salmon habitat in the River Ugie and afurther 146,438 square meters where salmon may be present.
Egg requirement
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
Est
imat
ed e
gg r
equi
rem
ent
Plot shows 50, 70 and 90% of theestimates (wide to narrow bars).
5. Percentage chance that the egg requirement has been reached
Year Percentage above
2015 57.942016 69.972017 37.512018 38.612019 28.92
65
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
2015 2016 2017 2018 2019Year
Est
imat
ed e
gg n
umbe
rs
Plot shows 50, 70 and 90% of the estimates (wide to narrow bars). Shaded areasrepresent 50, 70 and 90% of the estimated egg requirements (dark to light areas)
66