Assessment of BIOMass EXport from marineprotected areas and its impacts on fisheries

in the western Mediterranean Sea

http://www.univ-perp.fr/ephe/biomex/

MAS3-CT97-0155

ECOLOGICAL EFFECTS OF PROTECTION INMEDITERRANEAN MARINE RESERVES

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 andcomparable manner.

Origins of BIOMEX

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.

Assessment of BIOMass EXport from marineprotected areas and its impacts on fisheries

in the western Mediterranean Sea

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

MPAcenter MPA

boundary

Increasing distance from the MPA

Fis

h b

iom

ass

A common objective

=> defining a gradient of

biomass

A multidisciplinaryapproach

Visual census

Plankton and

oceanographic

survey CPUE survey

Fishing survey

Video 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

Network

Steering

TrainingEditing

WP1: CoordinationResp.: 1

Part.: all

Measuring export of adult populations

WP2: Visual census

Resp.: 2Part.: 3, 4, 7, 8

WP4: Plankton survey

Resp.: 5Part.: 1, 2, 6, 9

Measuring export of eggs

& larvae

WP6: CPUE around MPAs

Resp.: 3Part.: 1, 2, 4, 5, 7

WP5: Fishing survey

Resp.: 4 / Part.: 3

Fisheries value of biomass export

Estimating biomass export

WP3: Video survey

Resp.: 7Part.: 1, 3

?

distance

B

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)

Coordinator : Coordinator :

Partnership

Contributors :Contributors :

GIS Posidonie - Université de Luminy - Marseille

Institut Espanol de Oceanografia- Centro de Baleares

AZTI

Universitat de Alicante

Universitat de Murcia

University College - Dublin

World Wildlife Fundation - France

Institut de ciencies del Mar - Barcelona