'Shark and ray populations have declined by around 70 per cent since the
1970s, according to research published today in Nature.
A team of researchers from countries including the UK, Canada, and
Australia looked at data from 18 shark and ray species, measuring their
abundance as well as where they sat on the list of threatened species.
One of the study's authors, Cassandra Rigby from James Cook University,
said the research, supported by the Shark Conservation Fund, showed an
"alarming" decline over the past 50 years.
"They have a key role in the marine ecosystems, and if you remove them,
their ecosystem starts to shift, and it can have really negative
consequences for all fishes in the ocean."'
*** Xanni ***
Chief Scientist, Xanadu
Partner, Glass Wings
Manager, Serious Cybernetics