Tuesday 10 February 2004 Tea at 7pm, talk starts 7.30pm
York St John College, Lord Mayors Walk, York *** NB new venue, new time
How many krill are in the sea? How to count krill in the Antarctic
Ocean if you're not a penguin, seal or whale
Alistair Murray
Central Science Laboratory (ex-British Antarctic Survey)
Room is in Skell Building,
map at www.yorksj.ac.uk/Default.asp?Page_ID=119&Parent_ID=168#maps
Meetings are open to visitors as well as RSS members.
ALL WELCOME
Synopsis
Antarctic krill (small swimming shrimps) are the keystone of the Southern
Ocean food web. Krill feed on microscopic plants (phytoplankton), and are
themselves captured by fish, penguins, seabirds, seals, whales and
fishermen. The krill fishery is regulated by an international treaty that
aims to balance the competing demands of man and wildlife, so maintaining
the integrity of the whole ecosystem. Rational resource management
requires good stock estimates on which to base decisions. The talk will
present aspects of design and analysis of krill surveys which provide
these estimates. Design-based and Model-based approaches will be compared
and some of the difficulties of the latter for highly aggregated organisms
like krill discussed.
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