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catch of the sixteen tuna and tuna-like species covered
by the IOTC Agreement have repeatedly exceeded 1 million
tonnes since 1993. Tunas represent 85% of this total.
These figures only partially cover the catches of the
fleets under flags of convenience which usually do not
report their catches. The Indian Ocean catch has increased
from 18 % of the world-wide total ten years ago to
24 % at present. In the ten last years for which
statistics are available (1987-1996) Indian Ocean catch
has passed from 20 % to 75 % more than that
of the Atlantic.
The producer value is estimated, very roughly, at between
2 and 3 billion dollars annually. This does not take
account of value-added from support industries and processing
or social benefits such as employment and nutrition
which are particularly important in artisanal fishery
situations.
The Indian Ocean differs from the other oceans in that
artisanal fisheries take as much as industrial fisheries.
In coastal country catches (except for Maldives, Sri
Lanka and Indonesia), neritic species predominate, while
the distant water fishing nations (DWFNs) target tropical
and temperate oceanic tunas and, to a lesser extent,
swordfish.
Artisanal fisheries use gill nets, troll lines and
pole-and-line gears to target tuna and tuna-like species.
Their importance has increased significantly in recent
years and artisanal craft are ranging over progressively
larger areas.
Longlining started in 1952 in the western Indian Ocean
and, by the mid 1970s, had spread over most of the ocean.
This fishery now produces nearly 250,000 tonnes
annually. Of the industrialised fishing methods, this
gear produces the highest value as large fish are caught,
much of which goes to the high priced sashimi market.
Purse seining started in the early 1980s and now produces
nearly 360,000 tonnes. Most of the catch is destined
to the canned fish market at relatively low prices.
Canning, however, is an important activity in a number
of Indian Ocean countries including Thailand, Seychelles,
Mauritius and Madagascar.
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