skeena salmon benchmarks and status
DESCRIPTION
Skeena Salmon Benchmarks and Status. Josh Korman (Ecometric/UBC) Steve Cox-Rogers (DFO)- Sockeye Data and estimates of carrying capacity Karl English (LGL) – Escapement and Exploitation Data Development and Synthesis Mike Hawkshaw (UBC) – State Space Modelling - PowerPoint PPT PresentationTRANSCRIPT
Skeena Salmon Benchmarks and Status
Josh Korman (Ecometric/UBC)
Steve Cox-Rogers (DFO)- Sockeye Data and estimates of carrying capacity
Karl English (LGL) – Escapement and Exploitation Data Development and Synthesis
Mike Hawkshaw (UBC) – State Space Modelling
Carl Walters (UBC) – State Space Modelling
Sockeye Data
# of Age PR-based SmaxCU Name 1980-2008 1960-2008 Samples Estimate
Alastair 19 39 151 (2) 23,437Aldrich 422Asitika 0 1AtnaAzuklotz 13 15 5,933Babine_Enhanced 26 36 17,489 (32) 1,700,000Babine_Early 26 36 46362
Babine_Mid 26 36 46362
Babine_Late 26 36 46362
Bear 5 10 46 (1) 40,532BulkleyDamshilgwit 2 2 67 (1) 2,000DennisEcstall/LowerFootsoreJohansonJohnston 3 10 4,125Kitsumkalum 20 40 20,531Kitwancool 4 4 299 (4) 36,984KluatantanKluayazLakelse 13 33 194 (1) 35,916MaxanMcdonell 6 22 4,072Morice 13 33 98 (1) 191,362Motase 9 9 1,764NilkitkwaSicintineSlamgeeshSpawningStephens 12 29 7,069SustutSwan 11 21 100 (1) 21,432Tahlo/Morrison 15 31 44,587
# of Stock-Recruit Points
0 10 25
0
10
20
30
40
50
60Alastair
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 2 4 6 8
0
5
10
15Azuklotz
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 400
0
1000
2000
3000
4000
5000
6000Babine_Enhanced
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 100 250
0100
200
300400
500
600
Babine_Early
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 40 80
0
50
100
150 Babine_Mid
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 300 600
0
500
1000
1500
Babine_Late
Spaw ners ('000s)
Rec
ruits
('0
00s)
0.0 0.3 0.6
0
1
2
3
4
5Bear
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8 12
0
2
4
6
8
Johnston
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 20 40
0
10
20
30
40
50Kitsumkalum
Spaw ners ('000s)
Rec
ruits
('0
00s)
0.0 1.5 3.0
0
2
4
6
8
Kitwancool
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 20
0
10
20
30
40Lakelse
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8
0
5
10
15
20
Mcdonell
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 40 80
0
50
100
150
200Morice
Spaw ners ('000s)
Rec
ruits
('0
00s)
0.0 0.2 0.4
0.0
0.5
1.0
1.5
Motase
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 5 15
0
5
10
15
20
Stephens
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8 12
0
10
20
30
40
Swan
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 10 20
010203040506070
Tahlo/Morrison
Spaw ners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s) Sockeye
0 1 2 3 4 5
0.0
0.2
0.4
0.6
0.8
Pro
ba
bili
ty
Alastair
Azuklotz
Babine_Enhanced
Babine_Early
Babine_Mid
Babine_Late
Bear
Johnston
Kitsumkalum
Kitwancool
Lakelse
Mcdonell
Morice
Motase
Stephens
Swan
Tahlo/Morrison
Sockeye
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0
Alastair
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0
1.5Azuklotz
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-3
-2
-1
0
1
Babine_Enhanced
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1
0
1
2 Babine_Early
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5Babine_Mid
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-2
-1
0
1
Babine_Late
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-2
-1
0
1
2Bear
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-0.8
-0.6-0.4-0.20.00.20.4
0.6Johnston
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-0.6-0.4
-0.20.00.2
0.40.6
Kitsumkalum
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0
Kitwancool
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0
1.5
Lakelse
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0
1.5 Mcdonell
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.5-1.0-0.50.00.51.01.5
Morice
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.0
-0.5
0.0
0.5
1.0Motase
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-0.4
-0.2
0.0
0.2
0.4
0.6Stephens
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.5
-1.0
-0.5
0.0
0.5
Swan
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1995 2010
-1.5-1.0-0.50.0
0.51.01.5
Tahlo/Morrison
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
Sockeye
1980 1995 2010
05
101520
2530
35 Alastair
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
2
4
6
8Azuklotz
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
200
400
600
800
Babine_Enhanced
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
50
100
150
200
Babine_Early
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
20
40
60
80Babine_Mid
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
100
200
300
400
500
600Babine_Late
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15
20
Bear
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15
Johnston
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
10
20
30
40
Kitsumkalum
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15
20
25 Kitwancool
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
20
40
60
80
Lakelse
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15Mcdonell
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
20
40
60
80
100Morice
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
1
2
3
4
5
6Motase
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15
20Stephens
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
0
5
10
15
20
25
Swan
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1995 2010
01020
304050
6070Tahlo/Morrison
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
Brood Year
Es
ca
pe
me
nt
('0
00
s)
Sockeye
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
AvgEsc/So
Avg
ER
/Uo
pt
AlastairAzuklotz
Babine_Enhanced
Babine_Early
Babine_Mid
Babine_Late
Bear
Kitsumkalum
Kitwancool
Lakelse
Mcdonell
Morice
Motase
Stephens
Swan
Tahlo/Morrison
Sockeye
Limited Effect of TimePeriod on Benchmarksand Status
0 10 25
0
10
20
30
40
50
60Alastair
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 2 4 6 8
0
5
10
15Azuklotz
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 400
0
1000
2000
3000
4000
5000
6000Babine_Enhanced
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 100 250
0100
200
300400
500
600
Babine_Early
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 40 80
0
50
100
150 Babine_Mid
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 300 600
0
500
1000
1500
Babine_Late
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 5 10
0
5
10
15Bear
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8 12
0
5
10
15
Johnston
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 20 40
0
10
20
30
40
50Kitsumkalum
Spaw ners ('000s)
Rec
ruits
('0
00s)
0.0 1.5 3.0
0
2
4
6
8
Kitwancool
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 40 80
0
20
40
60
80Lakelse
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8
0
5
10
15
20
Mcdonell
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 40 80
0
50
100
150
200Morice
Spaw ners ('000s)
Rec
ruits
('0
00s)
0.0 0.2 0.4
0.0
0.5
1.0
1.5
Motase
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 5 15
0
5
10
15
20
Stephens
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 4 8 12
0
10
20
30
40
Swan
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 20 40
0
20
40
60
80
Tahlo/Morrison
Spaw ners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
1.0 1.5 2.0 2.5
1.0
1.5
2.0
2.5
HBM alpha
Sta
te S
pa
ce a
lph
a
Alastair
Azuklotz
Babine_Enhanced
Babine_Early
Babine_Mid
Babine_Late
BearJohnston
Kitsumkalum
Kitwancool
Lakelse
Mcdonell
Morice
Motase
Stephens
Swan
Tahlo/Morrison
Chinook
0 1 2 3 4 5 6
0
5
10
15
Ecstall
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 1 2 3 4 5 6
0
1
2
3
4
5
6Lower_Skeena
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 1 2 3 4
0
1
2
3
Kalum_Early
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 10 20 30 40
0
20
40
60
80Kalum_Late
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 20 40 60 80
0
20
40
60
80
100
120Mid_Skeena_Large_Lakes
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 5 10 15 20 25 30 35
0
10
20
30
40
Mid_Skeena_Main_Tribs
Spaw ners ('000s)R
ecru
its (
'000
s)
0.0 0.5 1.0 1.5 2.0 2.5
0
2
4
6
8
Upper_Bulkley
Spaw ners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
1980 1985 1990 1995 2000 2005 2010
-0.2
0.0
0.2
0.4
Ecstall
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.4
-0.2
0.0
0.2
0.4
0.6Lower_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.5
0.0
0.5Kalum_Early
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.5
0.0
0.5
Kalum_Late
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.5
0.0
0.5
Mid_Skeena_Large_Lakes
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.4-0.20.00.20.40.60.8
Mid_Skeena_Main_Tribs
SR_BY[1:Nyrs[i], i]re
s[1:
Nyr
s[i],
i]
1980 1985 1990 1995 2000 2005 2010
-1.0
-0.5
0.0
0.5
1.0
Upper_Bulkley
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
1980 1985 1990 1995 2000 2005 2010
0
2
4
6
8Ecstall
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
1
2
3
4
5
6Lower_Skeena
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
1
2
3
Kalum_Early
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
10
20
30
40Kalum_Late
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
20
40
60
80Mid_Skeena_Large_Lakes
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
510
15
20
2530
Mid_Skeena_Main_Tribs
Spaw ners ('000s)R
ecry
uts
('000
s)
1980 1985 1990 1995 2000 2005 2010
0
2
4
6
8
Upper_Bulkley
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
Brood Year
Es
ca
pe
me
nt
('0
00
s)
1980 1985 1990 1995 2000 2005 2010
0.4
0.5
0.6
0.7
0.8
0.9 Ecstall
1980 1985 1990 1995 2000 2005 2010
0.3
0.4
0.5
0.6
0.7Lower_Skeena
1980 1985 1990 1995 2000 2005 2010
0.1
0.2
0.3
0.4
0.5
0.6
Kalum_Early
1980 1985 1990 1995 2000 2005 2010
0.3
0.4
0.5
0.6
0.7
0.8Kalum_Late
1980 1985 1990 1995 2000 2005 2010
0.3
0.4
0.5
0.6
0.7
Mid_Skeena_Large_Lakes
1980 1985 1990 1995 2000 2005 2010
0.3
0.4
0.5
0.6
0.7
0.8Mid_Skeena_Main_Tribs
1980 1985 1990 1995 2000 2005 2010
0.1
0.2
0.3
0.4
0.5
0.6
Upper_Bulkley
Year
Ex
plo
ita
tio
n R
ate
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
AvgEsc/So
Avg
ER
/Uo
pt
Lower_Skeena
Kalum_Early
Kalum_LateMid_Skeena_Large_Lakes
Mid_Skeena_Main_Tribs
Upper_Bulkley
0 10 20 30 40 50 60
0
20
40
60
80
Skeena_Estuary
Spawners ('000s)
Rec
ruits
('0
00s)
0 50 100 150 200
0
100
200
300
400
500
Lower_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
0 100 200 300 400 500 600
0
200
400
600
800
Middle_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
0 5 10 15
0
5
10
15
20
Upper_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
Coho
1980 1985 1990 1995 2000 2005 2010
-2
-1
0
1
2
Skeena_Estuary
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-1.0
-0.5
0.0
0.5
1.0
1.5
Lower_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-2
-1
0
1
2Middle_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-0.2
-0.1
0.0
0.1
0.2Upper_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
1980 1985 1990 1995 2000 2005 2010
0
10
20
30
40
50
60
Skeena_Estuary
Spawners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
50
100
150
200
Lower_Skeena
Spawners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
100
200
300
400
500
600Middle_Skeena
Spawners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
5
10
15
20
Upper_Skeena
Spawners ('000s)
Rec
ryut
s ('0
00s)
Brood Year
Es
ca
pe
me
nt
('0
00
s)
1980 1985 1990 1995 2000 2005 2010
0.3
0.4
0.5
0.6
Skeena_Estuary
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7
0.8Lower_Skeena
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7
Middle_Skeena
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7Upper_Skeena
Year
Ex
plo
ita
tio
n R
ate
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
AvgEsc/So
Avg
ER
/Uo
pt
Skeena_Estuary
Lower_Skeena
Middle_Skeena
Upper_Skeena
0 1000 2000 3000 4000
0
2000
4000
6000
8000Nass_Skeena_Estuary
Spawners ('000s)
Rec
ruits
('0
00s)
0 500 1000 1500 2000
0
1000
2000
3000
4000
5000
Middle_Upper_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
0 200 400 600 800
0
200
400
600
800
1000
1200
Nass_Skeena_Estuary
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 1000 2000 3000 4000
0
5000
10000
15000
Lower_Skeena
Spaw ners ('000s)
Rec
ruits
('0
00s)
0 500 1000 1500 2000 2500 3000 3500
0
2000
4000
6000
8000
10000
12000
14000 Middle_Upper_Skeena
Spaw ners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
Pink – Even Yrs Pink – Odd Yrs
Pink – Even Yrs Pink – Odd Yrs
1980 1985 1990 1995 2000 2005 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
Nass_Skeena_Estuary
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5Lower_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
Middle_Upper_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
1980 1985 1990 1995 2000 2005 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Nass_Skeena_Estuary
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-1.0
-0.5
0.0
0.5
1.0
1.5
Middle_Upper_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
Pink – Even Yrs Pink – Odd Yrs
1980 1985 1990 1995 2000 2005 2010
0
200
400
600
800Nass_Skeena_Estuary
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
1000
2000
3000
4000
Lower_Skeena
Spaw ners ('000s)R
ecry
uts
('000
s)
1980 1985 1990 1995 2000 2005 2010
0
500
1000
1500
2000
2500
3000
3500Middle_Upper_Skeena
Spaw ners ('000s)
Rec
ryut
s ('0
00s)
Brood Year
Es
ca
pe
me
nt
('0
00
s)
Pink – Even Yrs Pink – Odd Yrs
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7
0.8Nass_Skeena_Estuary
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7
Lower_Skeena
1980 1985 1990 1995 2000 2005 2010
0.2
0.3
0.4
0.5
0.6
0.7
Middle_Upper_Skeena
Year
Ex
plo
ita
tio
n R
ate
1980 1985 1990 1995 2000 2005 2010
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Nass_Skeena_Estuary
1980 1985 1990 1995 2000 2005 2010
0.1
0.2
0.3
0.4
0.5
0.6
0.7Middle_Upper_Skeena
Year
Ex
plo
ita
tio
n R
ate
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
AvgEsc/So
Avg
ER
/Uo
pt
Nass_Skeena_Estuary
Middle_Upper_Skeena
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.0
AvgEsc/So
Avg
ER
/Uo
pt
Nass_Skeena_Estuary
Lower_SkeenaMiddle_Upper_Skeena
0 50 100 150
0
50
100
150
200
250
300
Lower_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
0 2 4 6 8 10 12 14
0
5
10
15
20
25
Middle_Skeena
Spawners ('000s)
Rec
ruits
('0
00s)
Spawners ('000s)
Re
cru
its
('0
00
s)
1980 1985 1990 1995 2000 2005 2010
-2
-1
0
1
2
Lower_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
1980 1985 1990 1995 2000 2005 2010
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Middle_Skeena
SR_BY[1:Nyrs[i], i]
res[
1:N
yrs[
i], i]
Brood Year
Lo
g R
es
idu
als
(o
bs
-pre
d)
Chum
1980 1985 1990 1995 2000 2005 2010
0
50
100
150
Lower_Skeena
Spawners ('000s)
Rec
ryut
s ('0
00s)
1980 1985 1990 1995 2000 2005 2010
0
2
4
6
8
10
12
14 Middle_Skeena
Spawners ('000s)
Rec
ryut
s ('0
00s)
Brood Year
Es
ca
pe
me
nt
('0
00
s)
1980 1985 1990 1995 2000 2005 2010
0.1
0.2
0.3
0.4
0.5
Lower_Skeena
1980 1985 1990 1995 2000 2005 2010
0.0
0.1
0.2
0.3
0.4
0.5
Middle_Skeena
Year
Ex
plo
ita
tio
n R
ate
Chum
0.0 0.5 1.0 1.5 2.0
0.0
0.5
1.0
1.5
2.0
AvgEsc/So
Avg
ER
/Uo
pt
Lower_Skeena
Middle_Skeena
Summary
Species # CUs # CUs < Sgen1 # CUs Overharvested
Sockeye 17 5 0
Chinook 7 0 0
Coho 4 <=1 1
Pink 5 1 0
Chum 2 0 (uncertain!) 1