Transcript Document

WP2 and WP7 cooperation
Henn Ojaveer
Estonian Marine Institute, Estonia
WP7 w-p, Lima, 4-7. Dec. 2006
Contents
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What WP2 members are doing
WP2 database plans
Initially agreed indicators by WP7
Ways towards solutions: cooperation between
WP7 and WP2
• Documents:
– The WP2 Database and its usefulness to WP7
– WP2 ws1 report
Activities of WP2 members
• IMAPRE: Humboldt Current. The species
under study are hake, Peruvian seabass,
Peruvian croaker and searobin, over a time
span of 1971-2005. Catch statistics and
biomass estimates by VPA are being used,
and CPUE and length-frequency data are
currently being collected. IMARPE intend
to look at the biological parameters of the
species and the historical by-catch.
Activities of WP2 members
• CDF: Galapagos Marine Reserve. Period 19602006. The main species of research are spiny
lobster and sea cucumber. Catch, effort and
biological data have been collected and is being
systemized. Future work on collating the
traditional ecological knowledge of the resource
will begin in March. Other planned research is to
interview local fishers to obtain past catch and
effort rates, continue the collection of data from
various official sources and finally to compare
spatial- temporal shifts in the catch composition.
Activities of WP2 members
• MEI: Baltic Sea LME. Time period
beginning in the late 18th century. They are
looking at herring, cod, eel and flounder,
among others. Looking at customs books,
magistrates, reports, and communications
for further information of imports and
exports of marine resources.
Activities of WP2 members
• UNIABDN North Sea LME and the CelticBiscay Shelf LME. Data from 1965
onwards. Landings of several species, most
notably herring and haddock. They have
data from many sources; these data cover
biological, fishing, environmental and
legislative information as well as
management regimes
Activities of WP2 members
• Roskilde University Limfjord fisheries, which
touches both the North Sea and the Baltic Sea
LMEs. Data are available from 1600 to present.
Species researched are mussel, oyster, eel, plaice,
whitefish and herring, among others. These have
been studied in terms of regime shifts, fishing
mortality, climate change, hydrographic change,
episodic events and societal changes.
Activities of WP2 members
• CEFAS North Sea LME. Research on
herring landings from 1800 to 1980. For this
they are looking at fishing vessels, length,
weight and biomass of fish, fleets, CPUE
and fishing activity.
Activities of WP2 members
• UHULL Benguela Current and the Southeast
Australian Shelf. In the Benguela Current, the
main species studied are snoek, hake, mackerel
and seals, with a data range between 1815 and
2001. The Southeast Australian Shelf has available
data from 1918 – 1957, and concentrates on tiger
flathead and John Dory. These data are beginning
to be put in context in terms of what was
happening to influence the fisheries at the time.
European northern seas (Baltic,
North, White and Barents seas I)
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Bager, M. and Karnøe Søndergaard, M. The Danish Baltic Sea fisheries c.
1875-1911
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Eero, M. and MacKenzie, B. R. Analysis of the accuracy of catch statistics for
reflecting relative fluctuations in the eastern Baltic cod stock in the first half of
the 20th century
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Enghoff, I. B. and MacKenzie, B. R. Archaeological evidence of the effects of
warm temperatures on the fish fauna in the North Sea-Baltic Sea region
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Gaumiga, R., Karlsons, G., Uzars, D. and Ojaveer, H. Fisheries of the Gulf of
Riga (Baltic Sea) in the late 17th century
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Lotze, H. Rise and fall of fishing and marine resource use in the Wadden Sea,
southern North Sea
European northern seas (Baltic,
North, White and Barents seas II)
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Lajus, D., Alekseeva, Y. and Lajus. J. Herring fisheries in the White and
Barents Sea in the 18th - beginning of the 20th cc: factors effecting the catch
fluctuations
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Lajus, D., Dmitrieva, Z., Kraikovski, A., Lajus, J., Yurchenko, A. and
Alexandrov, D. Historical records of the 17 – 18th century fisheries for Atlantic
salmon in northern Russia: methodology and case studies of population
dynamics
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Lajus, J., Ojaveer, H., Tammiksaar, E. Fisheries on the north-eastern coast of
the Baltic Sea in the first half of the 19th century: what can we learn from the
archives of Karl Ernst von Baer
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MacKenzie, B. R., and Myers, R. A. The development of the northern
European fishery for bluefin tuna Thunnus thynnus during 1900-1950.
European northern seas (Baltic,
North, White and Barents seas III)
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Poulsen, R. T., Cooper, A. B. and Holm, P. The importance of historical
baselines to fisheries management - An abundance estimate of ling (Molva
molva) in the northeastern North Sea, 1872
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Poulsen, B. and Holm, P. A fishery of historical magnitude. Reconstructing
the 17th-19th centuries catches of herring, eel, whitefish and plaice in
Limfjorden, Denmark.
•
Barnard, M. Shared. Spaces, complex interactions: the impact of extractive
activity on fish populations in the Noth Sea UKCS since 1945
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MacKenzie, B. R., Bager, M., Ojaveer, H., et al. Multi-decadal scale
variability in the eastern Baltic cod fishery 1550-1850 – evidence and causes
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Ojaveer, H., Awebro, K., Karlsdottir, H., MacKenzie, B. R. Swedish Baltic Sea
fisheries during c. 1870-1913: spatio-temporal dynamics of catch and fishing
effort
WP 2 database plans
LME
Main Resource
Period
Celtic-Biscay Shelf*
Herring, Haddock
1960-2006
North Sea*
All species
1880-2000
Herring
1752-1980
Herring, Haddock
1960-2006
All species
1800-2000
Herring
1752-1980
Benguela Current*
Snoek
1815-2001
Southeast Australian Shelf*
Tiger Flathead
1918-1957
Pacific Central-American
Coastal*
Sea Cucumber, Lobster
1960-2006
Humboldt Current*
Hake
1971-2005
Caribbean Sea*
Snappers, Sharks, Rays
1970-2006
Baltic Sea*
Gulf of Thailand*
Black Sea*
Newfoundland-Labrador Shelf
South China Sea
Selected Indicators WP7 ws1
Indicator
% of mature fish in catch
1
Mean length in pop. or
mixed fishery
2
Lm (also eventually length
where 90-100% are
mature)
length frequency of catch
Length-frequencies from catch
or surveys
% of ‘optimum’ size in catch
Length-weight relationship for
species
% “mega spawners” in
catch(goal 0%)
3
Mean max. length in pop or
mixed fishery
4
Required Data
% Bycatch in total catch
Possible responses
Promote capture of
mature fish through
Fish ruler and info
sheet for fish traders
Same as above
MPAs
Campaign “Let
Length-frequencies from catch
Megaspawners live”
and surveys
Only catch cohorts after
1st and before 2nd
spawning
Bycatch biomass by fishery
Awareness/
“propaganda” campaign
Cooperation
• Basis: overlap of interests of WP7 and WP2
members
• Selected LMEs
• Time-window: max. last 50 years
• Selected species
• Potential candidates:
Humbolt current (IMAPRE)
North Sea (CEFAS & UNIABDN)
Others?