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F MSY is good. 0.9 F MSY is better. 0.9 MSY is best. Towards Healthy Fish Stocks and Profitable Fisheries in Europe. Rainer Froese IFM-GEOMAR, Kiel, Germany [email protected] EC, 22 June 2010, Brussels. What is a Stock?. A stock is the exploited part of a population of fishes

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slide1

FMSY is good

0.9 FMSY is better

0.9 MSY is best

towards healthy fish stocks and profitable fisheries in europe

Towards Healthy Fish Stocksand Profitable Fisheriesin Europe

Rainer Froese

IFM-GEOMAR, Kiel, Germany

[email protected]

EC, 22 June 2010, Brussels

what is a stock
What is a Stock?
  • A stock is the exploited part of a population of fishes
  • The total weight of the stock is called biomass (B)
  • SSB is the Spawning Stock Biomass, i.e., the total weight of the adults
what is msy
What is MSY?
  • MSY is the Maximum Sustainable Yield
  • MSY is the maximum catch that the stock can deliver on a regular basis
  • Catches above MSY shrink the stock
slide6

Cod, Eastern Baltic

MSY

Froese & Proelß Fish & Fisheries 2010

what is b msy
What is BMSY?
  • BMSY is the stock size that can produce the maximum sustainable yield
  • BMSY is the central reference point of the Law of the Sea and UNFSA (1995) with regard to fisheries

Can produce MSY

Can not produce MSY

BMSY

Depleted

Stock biomass B

Unfished

slide8

Cod, Eastern Baltic

BMSY

MSY

Froese & Proelß Fish & Fisheries 2010

what the hell is f
What the hell is F?
  • F is the rate by which fish are removed from the stock by fishing (fishing mortality)
  • F can be translated into the percentage of the stock that is taken by the fishery
what is f msy
What is FMSY?
  • FMSY is the fishing mortality that will lead to BMSY
  • F < FMSYleads to stock sizes above BMSY
  • F > FMSYshrinks the stock below BMSY

Greenland

halibut

Cod, herring

Sandeel

Froese & Proelß Fish & Fisheries 2010

slide11

Cod, Eastern Baltic

BMSY

FMSY

Froese & Proelß Fish & Fisheries 2010

slide13

Biomass of European Stocks

Froese & Proelß Fish & Fisheries 2010

fishing pressure on european stocks
Fishing Pressure on European Stocks

Froese & Proelß Fish & Fisheries 2010

rebuilding european fish stocks
Rebuilding European Fish Stocks

Average size of 54 European fish stocks (bold blue line). The upper arrow indicates the path, if 75% of the

stocks were to reach the internationally agreed target in 2015. The lower arrow shows the current trend.

Froese & Proelß Fish & Fisheries 2010

fishing pressure on european fish stocks
Fishing Pressure on European Fish Stocks

Damanaki

proposal

Average fishing pressure on 54 European fish stocks. The lower arrow indicates the path if 75% of the stocks

were to be fished at the maximum sustainable rate in 2015. However, with the current trend that target will be

missed by more than 30 years.

Froese & Proelß Fish & Fisheries 2010

slide23
Will Europe be able to at least reduce fishing mortality to FMSY by 2015?YESIf the Damanaki proposal succeeds
slide24

FMSY is good

because it leads to the biomass that can

produce the maximum sustainable yield

(Damanaki proposal)

0.9 FMSY is better

0.9 MSY is best

why is 0 9 f msy better than f msy
Why is 0.9 FMSY better than FMSY?
  • Because it increases stock size to 30% above BMSY
  • Because larger stock size means lower cost of fishing -> Maximum Economic Yield
  • Because international agreements (UNFSA 1995) asks for Ftarget < FMSY
  • Because the precautionary principle demands a safety distance to FMSY and BMSY
slide26

FMSY is good

because it leads to the biomass that can

produce the maximum sustainable yield

(Damanaki proposal)

0.9 FMSY is better

because it leads to larger

stocks, larger profits, more

safety, and compliance with

international agreements

0.9 MSY is best

why is 0 9 msy better than 0 9 f msy
Why is 0.9 MSY better than 0.9 FMSY?
  • Because 0.9 MSY has all the advantages of 0.9 FMSY

In addition

  • 0.9 MSY avoids exceeding MSY(FMSY will do that, thereby creating an incentive for overcapacity)
  • 0.9 MSY provides stability for the industry (same landings as long as B > BMSY)
  • 0.9 MSY is a simple, transparent rule that is easily communicated to stakeholders
0 9 msy harvest control rule
0.9 MSY Harvest Control Rule

Move stocks here.

Landings may then

be 60% higher

Froese et al., submitted

slide29

FMSY is good

because it leads to the biomass that can

produce the maximum sustainable yield

(Damanaki proposal)

0.9 FMSY is better

because it leads to larger

stocks, larger profits, more

safety, and compliance with

international agreements

0.9 MSY is best

Because, in addition to the previous,

it avoids overcapacity, provides

stability for the industry, and is

easy to understand

Thank You

Rainer Froese, IFM-GEOMAR

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