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Assessment of BIOMass EXport from marine
protected areas and its impacts on fisheries
in the western Mediterranean Sea
http://www.univ-perp.fr/ephe/biomex/
Origins of BIOMEX
ECOLOGICAL EFFECTS OF PROTECTION IN
MEDITERRANEAN MARINE RESERVES
MAS3-CT97-0155
The overall aim of ECOMARE is to unite and coordinate the efforts of a broad group of research teams
involved in assessing the effects of protection in Mediterranean littoral ecosystems. Within EU waters,
Mediterranean reserves are singled out for this study, not only because of their geographical proximity,
but also because they share important oceanographic and ecological features.
The specific objectives proposed in this action are:
1. To establish the state of knowledge of the responses of marine communities to
protective measures in Mediterranean littoral ecosystems.
2. To identify the main research needs and steps forward to progress from the
assessment of effects on exploited species to the assessment of the reserve effect at the
ecosystem level.
3. To standardize the working methodologies and data analysis and management
procedures for research in the areas identified in 2 so that in the future, investigations can
be carried out in a coordinated and
comparable manner.
Assessment of BIOMass EXport from marine
protected areas and its impacts on fisheries
in the western Mediterranean Sea
This proposal will investigate the efficiency of
Marine Protected Areas as sources of biomass. The main
objective is to assess the export of fisheries-related
biomass from MPAs to surrounding areas. Measures of
efficiency of MPAs for biomass export will be based on a
multidisciplinary approach that will include biological and
fisheries aspects. In this project, we consider MPAs as a
management tool for sustainable fisheries in areas open
to fishing.
1) To estimate the export of adult fishes from MPAs.
Evidence of biomass export will be obtained by assessing
the existence of a gradient of abundance and mean
size of target species across boundaries of the reserve.
2) To estimate pelagic export resulting from the
dispersal of eggs and larvae. We will determine the
distribution and size/age of planktonic larvae within
and surrounding the marine reserve, looking for a
gradient of larval abundance in relation to the age of
larvae. This survey will be linked to a survey of the
hydrography of the area that will describe the dispersal
potential of passive eggs and larvae from the MPAs.
3) To estimate the contribution of adult fish export to
fisheries. To quantify the impact of MPAs on fisheries
we will carry out experimental fishing surveys at
increasing distances from the MPA boundaries to assess
gradients of catch per unit effort. In addition, we will
sample on board commercial fishing vessels operating
in adjacent fishing grounds.
4) Finally, we intend to translate our findings from the
first three project components into management
actions and recommendations for MPA policies in
order to ensure the valorisation of these scientific results
into actual achievements for a better management of
marine coastal areas.
Main commitments
• A common objective over approaches
• A multidisciplinary approach
• A common sampling plan
• 6 Marine protected Areas
A common objective
Fish biomass
=> defining a gradient of biomass
MPA
center
MPA
bound
ary
Increasing distance from
the MPA
Visual
census
Video
survey
A multidisciplinary
approach
Plankton
and
oceanograp
hic survey
CPUE
survey
Fishing
survey
(WP2) Measurement of gradient of biomass
across MPA boundaries using underwater
visual census techniques.
(WP3) Video survey of fish target species
within and around MPAs
(WP4) Measuring the gradient of abundance
of eggs and larvae across MPA boundaries
and modelling the surrounding oceanography
to estimate the export of potential recruits
and their area of influence
(WP5) Use of experimental fishing to quantify
MPA adult export
(WP6) Survey of distribution of catches and
effort around MPAs
WP1: Coordination
Network
Steering
Editing
Training
Resp.: 1
Part.: all
Estimating biomass export
Measuring export of
adult populations
WP2:
Visual
census
Resp.: 2
Part.: 3, 4, 7, 8
?
B
distance
Measuring
export of eggs
& larvae
Video
survey
Plankton
survey
Resp.: 5
Part.: 1, 2, 6, 9
Resp.: 7
Part.: 1, 3
WP5:
Fishing
survey
Resp.: 4 / Part.: 3
WP4:
WP3:
Fisheries value of
biomass export
WP6:
CPUE
around
MPAs
Resp.: 3
Part.: 1, 2, 4, 5, 7
A common sampling protocol
6 Marine Protected Areas
that have been established for at least the last 10 years;
for which there is already a large background of data
showing higher biomass inside;
easily accessible and where managers are known to be
approachable and willing to develop collaborative research
projects.
3 coastal MPAs
(Banyuls, Carry, and Cabo de Palos);
3 island MPAs that are close to the coastline
(Tabarca, Cabrera, Medes)
Partnership
Coordinator :
Contributors :
GIS Posidonie - Université de Luminy - Marseille
Institut Espanol de Oceanografia
- Centro de Baleares
Institut de ciencies del Mar - Barcelona
Universitat de Alicante
Universitat de Murcia
AZTI
University College - Dublin
World Wildlife Fundation - France