The EU purse seine fleet in the Indian Ocean:
Legalising the misreporting of catches must not be the solution
to a technical problem
Background
Tropical tuna species such as yellowfin and skipjack play a critical role for the food security and
development opportunities of coastal States in the Indian Ocean. Purse seine vessels are the
dominant gear type and the majority of purse seine vessels in the Indian Ocean are flagged to
Spain and France, which have been operating in the region since the 1980s.
These fish stocks are being managed by the Indian Ocean Tuna Commission (IOTC). Yellowfin is
currently the most contentious item on the IOTC agenda. Its stock is in an alarming state and
was included on
the IUCN Red List of E da gered Spe ies as ear
threatened
i
9. Si e
then, the situation has only deteriorated. According to the scientific committee of the IOTC,
the stock is currently overfished, and yet, overall catch levels have not declined, with
overfishing still occurring. The Spanish and French fleet are responsible for the majority of the
industrial catches of yellowfin tuna (21% and 15% respectively). Both countries have overshot
their quotas in 2017 and 2018.
With the adoption and reduction of catch limits for yellowfin tuna in 2017, the commercial
strategies of the fishing companies have changed: vessels have redirected their efforts from
generally single species free-swimming schools (comprising older fish) to more mixed species
schools (comprising a higher number of juveniles) targeted via Fish Aggregating Devices
(FADs). This resulted in an increased number of juvenile catches of yellowfin and bigeye tunas,
which can negatively affect the status of the stocks. It also makes it more difficult for fishers to
identify the type of tuna fished given the similarity of yellowfin and bigeye species when they
are small.
The technical problem
All EU purse seine vessels are required to submit an electronic logbook to fishing authorities in
which masters of the vessels report in near real time all data regarding their fishing activities
and estimated catches. According to the current EU fisheries Control Regulation, the difference
between the catch estimated by the masters in their fishing logbook and the actual catches
reported in the landing declaration cannot exceed 10% per species. A failure to respect this
10% is an infringement and can be subject to fines. The accumulation of 18 penalty points for
the misreporting of catches can lead to the temporary suspension of a vessel
s
activity. Three
points are allocated to a serious infringement for misreporting of catch, so before such a
suspension would be triggered at least six serious infringements could be incurred ahead of
the first suspension.
Some EU scientists have commented that most tuna species captured by the purse seine fleet
are easily distinguishable, since they have characteristic physical features. The skipjack is easy
to distinguish by the horizontal stripes that run down its body. Large adult bigeye and yellowfin
are characterised by dissimilar body and fin shapes. However, distinguishing between juvenile
yellowfin and bigeye can be challenging, as these differences are less noticeable when the fish
are young.
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Co
e ts o the assess e t of at h y spe ies i the tropi al purse sei e fishery
.
Document prepared by Jon
Ruiz,
et al
to discuss the feasibility of onboard sampling to improve catch composition estimates.
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