institute of coastal research self management of vendace fishery, bothnian bay teija aho, swedish...
TRANSCRIPT
Institute of Coastal Research
Self management of vendace fishery, Bothnian Bay
Teija Aho,
Swedish Board of Fisheries
Institute of Coastal Research,
Öregrund, Sweden
Right-based management in Sweden
Institute of Coastal Research
Self management of vendace fishery, Bothnian Bay
Trawl fishery for vendanceCoregonus albula
Fishery started in 1960s
Small-scale coastal fishery
Pair-trawling max 40 vessels
Spawning aggregations (roe for consumption)
Institute of Coastal Research
0
500
1000
1500
2000
2500
3000
3500
1990 1992 1994 1996 1998 2000 2002 2004
År
total biomassa
total lekbiomassa
landad mängd
Total biomass
SSB
Landings
Self management - vendace trawl fishery
SBF about to close the fishery!
Institute of Coastal Research
Goal: to create a sustainable fishery for vendace
– Project started autumn 2000, fishers initiative– All 40 (37 in 2007) vessels with fishing licenses included – Fishers steering group: six fishers – Coordination and decisions of management actions during fishing
Self management of vendace trawl fishery
Institute of Coastal Research
Swedish Board of Fisheries, local dept,-fishers independent sampling
Fishers steering group- management decisions- cooperation with Inst. Coastal Res.
Fishers management - structure
Swedish Board of Fisheries, Inst. of Coastal Research- management advice- age and population analyses
Trawl fishers- deliver log-books and sampling data
Swedish Board of Fisheries, Control and Resource depts.-log books-fishing licenses
Institute of Coastal Research
Fishers samplingOne sample per haul
• One basket unsorted fish, randomly • Each sample sorted and weighted
– adult vendace >12,5 cm– juvenile vendace– whitefish– herring– other species
Institute of Coastal Research
Fishers sampling - protocol
Institute of Coastal Research
Provides :- total catch- catch composition- effort
=> basis for stock assessment (VPA)
Fishers sampling
Institute of Coastal Research
Swedish Board of Fisheries, local dept,-fishers independent sampling
Fishers steering group- management decisions- cooperation with Inst. Coastal Res.
Fishers management
Swedish Board of Fisheries, Inst. of Coastal Research- management advice- age and population analyses
Swedish Board of Fisheries, Control and Resource depts.-log books-fishing licenses
Trawl fishers- deliver log-books and sampling data
Fishers management - structure
Institute of Coastal Research
Fishers independent sampling
Swedish Board of Fisheries sampling:• random sampling of individuals, ~ 10 kg• length, weight, sex, maturation status, gonad
weight, otoliths (age)• age determination
Provides age distribution and population characteristics (basis for assessment)
Institute of Coastal Research
Swedish Board of Fisheries, local dept,-fishers independent sampling
Fishers steering group- management decisions- cooperation with Inst. Coastal Res.
Fishers management - structure
Swedish Board of Fisheries, Inst. of Coastal Research- management advice- age and population analyses
Swedish Board of Fisheries, Control and Resource depts.-log books-fishing licenses
Trawl fishers- deliver log-books and sampling data
Institute of Coastal Research
Inst Coastal Res.
Supports steering group:• Stock assessment• Research activities, gear development• Management advice • Project administration
Institute of Coastal Research
Swedish Board of Fisheries, local dept,-fishers independent sampling
Fishers steering group- management decisions- cooperation with Inst. Coastal Res.
Fishers management
Swedish Board of Fisheries, Inst. of Coastal Research- management advice- age and population analyses
Swedish Board of Fisheries, Control and Resource depts.-log books-fishing licenses
Trawl fishers- deliver log-books and sampling data
Fishers management - structure
Institute of Coastal Research
Fishers steering groupManagement actions:
• Co-operation and communication among fishers
• Co-operation with ICR for e.g. sampling, gear development
• Reduction of fishing time
0
100
200
300
400
500
600
700
800
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
kg/timme
0
500
1000
1500
2000
2500
3000
3500
4000
Fångst per ansträngning
Tråtid timmar
CPUETrawling hours
Institute of Coastal Research
Legal reservesFishers reservesTrawl border
Management actions: Voluntary no-take areas
Institute of Coastal Research
Management actions: Gear development
Goal - to reduce proportion of juvenile vendace in catches by
- co-operation between fishers, researchers and managers- selective panels, fixed grids, and behaviour studies
retained
released
Institute of Coastal Research
Success story?
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
ton
0
50
100
150
200
250
300miljonerBeståndsbiomassa Antal rekryter
Project start
Stock biomass RecruitsTons Millions
Institute of Coastal Research
Trawl haul 2002Trawl haul 1998
0
0,5
1
1,5
2
2,5
3
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
ton
0
200
400
600
800
1000
1200
1400
1600
F (2-4åringar)Fiskeridödlighet Fångst
Landings, tons
Institute of Coastal Research
• Spawning biomass has increased (mainly due to good recruitment)
• Landings have increased• Improved gear selectivity• Good communication
between fishers, scientists and managers
• Self-management is possible!• Self-management is now the
standard for the vendace fishery
• Allow time to develop confidence and trust among involved partners
Success story? YES!