Dorothy English Mgmt Model pdf

meet Dorothy

meet Dorothy

(me)

I live in

Bergen

but come from

Indiana

I like to

&

I support

and I have a blog…

So friends & family can stay updated

www.dorothydankel.blogspot.com

and where interestedpeople cancomment on topics

www.dorothydankel.blogspot.com

I am a biologist…

and a PhDstudent in fisheriesmanagement

I am very interested in the social and economic sides of fisheries

Dorothy wants to make her science

relavant to those it affects…

we know there are conflicts of interest in marine resource management

I want to explore ways conflicts of objectives in fisheries can be resolved

Utility functions can serve as common language between stakeholders

uti

lity

my fish

uti

lity

my fish

but, stakeholders have differentideas about how fish can be useful!

vs.

therefore, natural conflicts of objectives between stakeholders arise

uti

lity

healthy fishstock

uti

lity

catch

Then Ray Hilborn wrote a paperabout fisheries conflicts…

Fishing Effort

Benefits(utility)

0 population crash

Hilborn (2007) ”Defining success in fisheries and conflicts in objectives”

Marine Policy

Fishing Effort

Benefits(utility)

yield

0 population crash


Marine Policy

here is a typical yield curve with maximum sustainable yield (MSY) at the top

Fishing Effort

Benefits(utility)

yieldprofit

0 population crash


Marine Policy

the profit curve has a maximum point to the left of MSY due to increasing costs of fishing effort

Fishing Effort

Benefits(utility)

employmentyieldprofit

0 population crash


Marine Policy

here Hilborn describes employment as linearly increasing with increasing fishing effort

Fishing Effort

Benefits(utility)


ecosystem preservation

0 population crash


Marine Policy

but ecosystem protection linearly decreases with increasing fishing effort

Fishing Effort

Benefits(utility)



zone of traditionalfisheries

management

0 population crash


Marine Policy

Fishing Effort

Benefits(utility)



zone of newconsensus


management

0 population crash


Marine Policy

Fishing Effort

Benefits(utility)





management

0 population crash


Marine Policy


management

Fishing Effort

Benefits(utility)


0 population crash

Dorothy asked herself:


management

Fishing Effort

Benefits(utility)

employmentyield


0 population crash

Can I model this? Does the zone of consensus really exist?

I thought this would make a great summer project…

and Ulf and Mikko thought so, too!

and Ulf and Mikko thought so, too!

Let’s bring Dorothy down to IIASA this summer.

Mmmm…Ok.

So Dorothy stayed 90 days and 90 nights at the Schloss in Austria…

(not exactly this one, but similar…)

and came up with an idea that she wants to share with stakeholders

+ =Management

model

A model that quantitively describesRay Hilborn’s discussion on conflictsof interests in fisheries

In order to answer this question:

Can stakeholder conflicts of objectives be reconciled in

marine fisheries management?

Can stakeholder conflicts of objectives be reconciled in

marine fisheries management?

Dorothy J. Dankel1,2

, Ulf Dieckmann1

& Mikko Heino1,2,3

1Evolution & Ecology Program, International Institute of Applied Systems Analysis (IIASA) Laxenburg, Austria

2Pelagic Research Group, Institute of Marine Research (IMR) Bergen, Norway

3Evolutionary Fisheries Ecology Program, University of Bergen, Norway

Utility modelPopulation model

+ =

Management modelSimplified modelling situation: don’t take terminology too seriously

The four utility components:PROFIT

EMPLOYMENTON LAND

EMPLOYMENTAT SEA

YIELD

ECOSYSTEM PRESERVATION(translated to stock level in the model)I show here a ray to illustrate that rays and skates are often caught as bycatch which is detrimental to the ecosystem

The four utility components:PROFIT

EMPLOYMENT

YIELD

STOCK LEVEL

The size of these pictures show how much weight each stakeholder places on the different utility components

What they care about:Modelled stakeholders:

Fishermen ”industrial””artisanal”

Society ”employment-oriented””profit-oriented”

Conservationists

What they care about:Modelled stakeholders:

Let’s go through each of the 5 stakeholders to get to know them and their differences

Remember! The size of the utility component pictures show how much preference each stakeholder places on each utility component

Two types of fishermen: industrial (large fishing vessels) & artisanal (small fishing boats)

What they care about:Stakeholders:

Fishermen

Two types of society: employment-orientedprofit-oriented

Society


These two types of society may be thought of in a Norwegianperspective as the last two fisheryministers Norway has had: Helga Pedersen (current minister) & Svein Ludvigsen (past minister)

Society


And finally, conservationists(commonly called eNGOs [environmental non-governmental organizations])

Conservationists


Each modelled stakeholder has a preference for each of the 4 utilitycomponents

based on stakeholder consultation

Stakeholder preferences

assumptions: stakeholder group consensus

YIELD (tons)

EMPLOYMENT(days-year)

PROFIT (€)

STOCK LEVEL(spawning stock biomass, tons)

FISHERMEN”industrial”

0.2 0 0.8 0

”artisanal” 0.4 0 0.4 0.2

SOCIETY”employment-

oriented”0.3 0.3 0.1 0.3

”profit-oriented” 0.2 0.1 0.7 0

CONSERVATIONISTS 0.1 0.1 0 0.8

uti

lity

component

YIELD (tons)

EMPLOYMENT(days-year)

PROFIT (€)

STOCK LEVEL(spawning stock biomass, tons)

FISHERMEN”industrial”

0.2 0 0.8 0

”artisanal” 0.4 0 0.4 0.2

SOCIETY”employment-

oriented”0.3 0.3 0.1 0.3

”profit-oriented” 0.2 0.1 0.7 0

CONSERVATIONISTS 0.1 0.1 0 0.8

uti

lity

component

Stakeholder preferences

assumptions: stakeholder group consensus

Total weight of all components for each stakeholder = 1.0

Caveat: stated stakeholder preferences do not always

equal revealed stakeholder preferences…

So, back to Dorothy’s research question:

So, back to Dorothy’s research question:

is there a basis for reconciling conflicting objectives?

let’s look at some results

Utility components & their tradeoffswith higher fishing levels

0.0

0.5

1.0

0.0 0.5 1.0Proportion harvested


0.0

0.5

1.0


profit


0.0

0.5

1.0


yield

profit


0.0

0.5

1.0


yield

profit

employment based on effort


0.0

0.5

1.0


yield


profit

employment based on catch


0.0

0.5

1.0


yield


profit

stock level

employment based on catch

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity

Proportion harvested

Stakeholder utilities

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"industrialfishery"

"artisanal fishery"

Fishermen


-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


“employment-oriented"

“profit-

oriented”


Society

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"


-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"

"industrialfishery"

"artisanal fishery"



“profit-

oriented”

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"

"industrialfishery"

"artisanal fishery"



“profit-

oriented”

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"

"industrialfishery"

"artisanal fishery"



“profit-

oriented”

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"

"industrialfishery"

"artisanal fishery"



“profit-

oriented”

-1.5

-1.0

-0.5

0.0

0.5

1.0

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90

Uti

lity


"conservationists"

"industrialfishery"

"artisanal fishery"


even with weight on employment , the”zone of new consensus” is clear


“profit-

oriented”

to conclude…

The ”zone of new consensus” is illustrated in Dorothy’s simplified model even when employment is considered

So, what’s next?

What if I tried to model a real stock?

This is how stakeholder contact can help

Could this model work in the real world? application to North Sea herring or Western horse mackerel?

Feedback from stakeholders

could stakeholder groups provide mewith realistic stakeholder preferencesand costs of effort and employment?

Feedback from stakeholders

I look forward to hearing your feedback

Thanks for getting to know Dorothy and her project!

Acknowledgements

3 month stay at the Institute of Applied Systems Analysis (IIASA) during the

Young Scientists Summer Program (YSSP) www.iiasa.ac.at

financed by the Norwegian Research Council

Thank you to the Evolution & Ecology Program & fellow YSSPers for insightful discussions

For more information, please contact Dorothy Dankel [email protected]

Economy & Finance

Dorothy English Mgmt Model pdf