The questions

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Transcript The questions

Towards a new sustainable fishing adventure?
– the snow crab in the Barents Sea
Carsten Hvingel,
Institute of Marine Research Norway
Credit to: Jan Sundet, Ann Merete Hjelset, Cecilie Hansen and Trude Thangstad
New species in the Barents Sea
Ecosystem
The Snow crab
The questions:
-Resource?
-Pest?
-Management?
Resource?
Stock is increasing
300
16
14
Stock size (index)
12
200
10
150
8
6
100
4
50
2
0
1998
2000
2002
2004
2006
2008
2010
2012
Year
Fishery starts
2014
0
2016
Landings (thousand tonnes)
250
…and continues to spread
Resource?
2021?
First recording
in 1996
Resource?
The prognosis:
Catch/yr
4.7
Billion NOK/yr
Catch potential fully developed fishery (1000t)
2.5
1.9 1.9
1.2 1.3
0.01 0.1 0.13 0.14 0.14 0.19 0.35 0.56 0.58
Pest?
Unknown ecosystem impact
• Creation of ecosystem «imbalance»
– New parasites, deceases
– Displacement of other species
– Trophic interactions
What will happen to
the existing fisheries?
Pest?
Modelled effects
+
Plankton:
Bunndyr: 7-27%
Torsk, hyse, lodde:
10-30%
÷
Adequate?
Resource management
Catch potential (1000 tons)
120
100
Assumptions:
Optimally managed exploitation
…and no «surprises»
Predicted
80
60
40
20
0
2015
2020
2025
Year
2030
2035
Adequate?
Resource management
Catch potential (1000 tons)
120
100
Predicted
80
Gold rush trap
60
40
20
Actual
0
2015
2020
2025
Year
2030
2035
Status: The short version…
• Known:
– Large economic potential
• Risk:
– Ecosystem response on
• Other species
• The snow crab himself
– The gold rush trap
• Action
– Exploitation control (management plan)
– Research related to resource dynamics
Thanks for your
attention!
The distribution of the fishery
Bonus
material