ECOLOGY AND ECONOMICS OF
NATURAL RESOURCES
international fisheries management
modelling ecological interactions
risk analysis
intraspecific interactions
migratory fish stock
Norwegian spring-spawning herring
stunted growth – common phenomenon among freshwater fish
9
yield
spawning stock biomass
profit
2
50
45
40
1.5
Length of fish (cm )
cooperative games
spawning stock/10 (kg), yield (kg) and profit (NOK)
2.5
x 10
1
0.5
causes
resource limitation
changes in survival probabilities
35
30
25
20
15
10
5
0
0
1
United Nations convention
on straddling and highly migratory fish stocks 1995
how to achieve sustainable cooperation in high seas fisheries
-0.5
0
0.1
0.2
0.3
0.4
0.5
0.6
fishing mortality
0.7
0.8
0.9
1
3
5
7
9
11
13
15
17
perca fluviatilis
19
Age
host-parasitoid interactions
clupea harengus
complex dynamics
intermittency, supertransient, non-unique dynamics,...
transboundary fish stocks
EEZ 1
C1
SH
C2
EEZ 2
dynamic games and incentives
cooperative equilibria
incentives to maintain efficient contracts

max J ( x 0 , Ei ) 


px ( t )  c i
 Ei ( t )
0
st dx / dt  rx ( 1  x / K )   Ei ( t ) x ( t )
Systems
Analysis Laboratory
Updated 24.2.2000
in collaboration with:

aTPt 
N t 1  N t exp r(1  N t ) 

1

aT
N
h t 


  aTPt
Pt 1  N t 1  exp
 1  aTh N t




SH = shared fish stocks
STR = straddling (and highly migratory) fish stocks
EEZ = exclusive economic zone
E2
selected publications
country 2
country 1
e  rt
STR
dt
maintaining production shares
keeps in joint optimum
E1
T. Bjørndal, V. Kaitala, M. Lindroos and G. Munro: Management of high seas fisheries, Annals of OR, 2000.
S. Touzeau, M. Lindroos, V. Kaitala and J. Ylikarjula: Economic and biological risk analysis of the Norwegian spring-spawning herring fishery, Annals of OR, 2000.
V. Kaitala and M. Lindroos: Sharing the benefits of cooperation in high seas fisheries: a characteristic function game approach, Natural Resource Modeling, 1998.
R. P. Hämäläinen, A. Haurie and V. Kaitala: Equilibria and threats in a fishery management game, Optimal Control Applications and Methods, 1985.
R.P. Hämäläinen, J. Ruusunen and V. Kaitala: Cartels and dynamic contracts in sharefishing, Journal of Environmental Economics and Management, 1990.
H. Ehtamo and R.P. Hämäläinen: A cooperative incentive equilibrium for a resource management problem, Journal of Economic Dynamics and Control, 1993.
R.P. Hämäläinen (ed.): Special issue on dynamic game modeling in bargaining and environmental negotiations, Group Decision and Negotiation, 1995.
J. Ylikarjula, M. Heino and U. Dieckmann: Ecology and adaptation of stunted growth in fish, Evolutionary Ecology, 2000.
V. Kaitala, J. Ylikarjula and M. Heino: Dynamic complexities in host-parasitoid interaction, Journal of Theoretical Biology, 1999.