Albatrosses are large seabirds that range widely in the Southern Ocean and North Pacific. They are absent from the North Atlantic and are among the largest of flying birds. Of the 21 species of albatrosses, 19 are threatened.
A new global estimate of the impact of longline fisheries on seabirds
reveals that, despite efforts to reduce seabird deaths, upwards of
300,000 birds are still being killed every year.
The study by scientists from BirdLife International and the RSPB is
published in the journal Endangered Species Research. It is a powerful
reminder of how far we still need to go to ensure ecologically
responsible fishing.
Since the 1980s, scientists have linked global declines of
albatrosses and other seabirds with ‘incidental catch’ in longline
fisheries. Adult and juvenile birds become snared on hooks attached to
the lines, which can be over a hundred kilometres long, and are dragged
underwater to a premature death.
Dr Orea Anderson, policy officer for the Global Seabird Programme and
lead author of this study said, “It is little wonder that so many of
the affected seabird species are threatened with extinction – their slow
rate of reproduction is simply incapable of compensating for losses on
the scale this study has demonstrated.”
A major factor determining this huge estimate is the emergence of
fleets, with previously unaccounted for bycatch problems, adding to the
global tally. While some fisheries have reduced their impacts on
seabirds, we are only just becoming aware of problems in others –
hampered by a lack of data.
The Spanish longline fleet on the Gran Sol grounds off SW Ireland is
one such fleet, with preliminary data suggesting it may be responsible
for killing large numbers of seabirds, potentially upwards of 50,000
annually, mostly shearwaters and fulmars. The Japanese tuna fleet came
second in scale – over 20,000 killed each year, but with the largest
impact on albatrosses.
Despite an exhaustive review, substantial data gaps remain (e.g.
Nordic, Asian distant water, and Mediterranean fleets) and until these
are filled it is impossible to gauge the true impact of global longline
activities on seabirds. However, the continued declining trends in many
seabirds remain a cause for grave concern. Seventeen out of 22 albatross
species are threatened with extinction with the main threat coming from
mortality in fisheries.
Some fisheries have enforced strict regulations, resulting in
substantial bycatch reductions in recent years. Seabird deaths around
South Georgia in the CCAMLR[3] zone of the Southern Ocean have declined
by 99% since regulations were enforced. South Africa achieved a drop of
85% bycatch in its foreign-licensed fleet in 2008, when a cap was placed
on the number of seabird deaths permitted. More recently, in April
2011, Brazil passed a law requiring the use of stringent seabird bycatch
measures in their domestic tuna longline fleets.
But the problem is so global in scale that every fishing nation has a
role to play in alleviating this needless waste of marine life.
BirdLife International and RSPB’s Global Seabird Programme call on
regional fisheries management organisations and industry to protect
seabirds through the use of simple, cost-effective mitigation measures
that have been proven to reduce the threat of bycatch. They are also
working to be part of the solution: the Albatross Task Force, founded by
the RSPB and BirdLife International, works directly with fishermen and
fishery managers in seven countries (bycatch hotspots) worldwide to
reduce the number of seabirds being killed.
Dr. Cleo Small, senior policy officer for the Global Seabird
Programme and co-author of the review, commented: “Using simple
bird-scaring lines and weighting of hooks as they enter the water could
dramatically reduce the number of seabirds being killed.
“With the UK’s Overseas Territories in the South Atlantic holding a
third of the world’s breeding albatrosses, the UK has a major
responsibility to ensure seabird-friendly fisheries. As for the EU, the
findings of this review place a heavy onus on the forthcoming EU Plan of
Action for Seabirds to deliver a robust set of remedial measures
capable of reducing the impact of longline and other fisheries on
seabird populations in EU waters and beyond.”