feeding the world on fish professor callum roberts …2010/03/16 · feeding the world on fish...
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Feeding the world on fish
Professor Callum Roberts University of York
1954
2003
2009
Landings of bottom fish into England and Wales
Year1880 1900 1920 1940 1960 1980 2000 2020
Land
ings
of d
emer
sal f
ish
(tonn
es)
0
200000
400000
600000
800000WWI WWII
Thurstan, Brockington and Roberts, Submitted
Year1880 1900 1920 1940 1960 1980 2000 2020
Land
ings
per
uni
t of f
ishi
ng p
ower
0
10
20
30
40
50
60
Landings by bottom trawlers (tonnes) into England and Wales per unit of fishing power
Thurstan, Brockingtonand Roberts, submitted
Common Fisheries Policy
The UK Food Standards Agency advises adults to eat 280g of fish per week
Total fish and shellfish landed into the UK (tonnes)
Total UK fish availability
Food Standards Agency recommendation
(UK landings + imports)- exports
UK landings
Total UK fish availability
Food Standards Agency recommendation
(UK landings + imports)- exports
UK landings
(UK landings + imports + aquaculture) - exports
Year
The recent landings gap has been filled by outsourcing overfishingto other countries
Number of bilateral fisheries access agreements between the EU and
other countries since 1983N
umbe
r of a
gree
men
ts in
ope
ratio
n
What is the global picture?
Year1950 1960 1970 1980 1990 2000 2010G
loba
l fis
h av
aila
bilit
y (g
ram
s/ca
pita
/wee
k)
0
100
150
200
250
Wild fish
Wild fish + aquaculture
The world picture
Global fish availability
2005 FAO Figures Million metric tonnes
Source of fishTotal Available for human
consumptionAvailable after processing
Wild catch 91 55.4 23.8Illegal/unreported catch* 18.5 18.5 8.3Artisanal catch* 20 19 8.2Aquaculture 51.7 51.7 22.2Total 181.2 144.6 62.5
*Estimated figures
Global fish needsAverage recommended adult weekly fish intake for nine nations = 366g
(UK, USA, Australia, New Zealand, Denmark, Iceland, Greece, Germany, Austria)
Million metric tonnes
World population 2005Extra fish needed over 2005
Multiple of today's aquaculture
Additional wild catch needed to sustain this much aquaculture**
6.477 billion 99.9 2.9 39.2World population 20509.1 billion 217 5.2 85.2With discards fully used* and no illegal fishing9.1 billion 208.5 5 81.9
* 27 million tonnes**Assumes the same proportion of fishmeal is used for aquaculture as today
Catch more by fishing less
Rate of growth in marine and freshwater aquaculture:Since 1970 = 6.9% per year (suspiciously high)Required to 2050 = 3.5% per year
How can we grow aquaculture production without increasing pressure on wild fish stocks and while minimising other environmental impacts?
What are the alternatives?
Your fish madam -made from the finest
pressed plankton.