Danilowicz, B. (Bret)

Goñi, R. (Raquel)

Harmelin-Vivien, M. (Mirelle)

Le-Diréach, L. (Laurence)

Mader, J. (Julien)

Ody, D. (Denis)

Planes, S. (Serge)

Pérez-Ruzafa, A. (Ángel)

Sabatés, A. (Ana)

Sánchez-Lizaso, J.L. (José Luis)

English

Repositorio Institucional Digital del IEO

European  Symposium  on  MPAs  as  a  Tool  for  Fisheries  Management  &  Ecosystem  Conservation. Murcia (Spain), 25-28 September, 2007   275Assessment of biomass export from marine protected areas and its impacts on fisheries in the western Mediterranean Sea  Serge Planes1, Laurence Le Diréach2, Mireille Harmelin-Vivien3, Ángel Pérez-Ruzafa4, Ana Sabatés5, José Luis Sánchez-Lizaso6 & Raquel Goñi7, Bret Danilowicz8, Denis Ody9 & Julien Mader10  1 - UMR 5244 CNRS-EPHE-UPVD, Université de Perpignan, 66860 Perpignan cedex, France 2 - GIS Posidonie, Parc scientifique & technologique de Luminy - Case 901, 13288 Marseille Cedex 09 - France 3 - Centre d’Océanologie de Marseille, UMR CNRS 6540 DIMAR, Station Marine d’Endoume, 13007 Marseille - France 4 - Depto. Ecologìa e Hidrologìa, Universidad de Murcia, Facultad de Biologìa, Campus de Espinardo, 30100 Murcia -Spain 5 - Depto. Recursos Marinos Renovables, Institut de Ciències del Mar, CSIC, Passeig Joan de Borbó s/n, 08039 Barcelona - Spain 6 - Depto. Ciencias Ambientales y Recursos Naturales, Unidad de Biologìa Marina, Universidad de Alicante, Ap. Correos 99, 03080 Alicante - Spain 7 - Instituto Español de Oceanografìa - IEO, Centro Oceanogràfico de Baleares, Muelle de Poniente s/n, Aptdo. 291, 07015 Palma de Mallorca - Spain 8 - Zoology Department, University College of Dublin, Science Building, Belfield, Dublin 4 -Ireland (present address: College of Science and Technology, Georgia Southern University, P.O. Box 8044, Statesboro, GA 30460 - USA) 9 - WWF  - France, 188 Rue de la Roquette, 75011 Paris - France 10 - Depto. Oceanografìa y Medio Ambiente, AZTI, Herrera Kaia - Portu aldea z//g, 20110 Pasaia (Gipuzkoa) -Spain  Corresponding author: planes@univ-perp.fr  Keywords: Biomass Export, MPA, Fisheries, Gradient, Larvae   The export role of MPAs has been emphasised as one of their major prospective benefits but evidence are rare and it is difficult to raise any conclusion. However, such export is a main economic and output of MPAs as it represents a production that can be used without damaging the MPA itself.    The  present  work  reports  on  a  large project  targeting  3  main  goals:  1/ to estimate potential biomass export of adult fishes from MPAs. Evidence of biomass export was obtained by assessing the existence of a gradient of abundance and mean size of target species across boundaries of the reserve,  2/ to estimate potential pelagic export resulting from the dispersal of eggs and larvae, and  3/ to estimate the potential contribution of adult fish export to fisheries.   These three approaches were conducted in 6 MPAs in the north-western Mediterranean following a common sampling protocol in order to obtain comparable data sets for a better comparison of MPAs and in order to determine if there are common trends.  Overall, the evidence of gradients in fish biomass and mean fish size supports the existence of fish exportation outside MPA, following our initial hypothesis. However, this exportation would benefit local fisheries only at a small spatial scale, from tens to hundreds of meters, even if fishes were able to migrate longer distances. The small scale (100 to 1000 m) on which fish biomass gradients from the MPAs studied were revealed was probably related to the high fishing pressure existing in the Western European  Symposium  on  MPAs  as  a  Tool  for  Fisheries  Management  &  Ecosystem  Conservation. Murcia (Spain), 25-28 September, 2007   276 Mediterranean outside MPA and, in some case, to habitat discontinuities.   We can conclude that results of such project have brought evidence of fish biomass export from MPA to fished areas in the NW Mediterranean, for adults as well as for eggs and larvae of some species or groups of species depending on the MPA.   Even if fish biomass export from MPA varies greatly in space and intensity according to fish species, and is restricted to a small distance from MPA border, it is likely to have positive effects on adjacent fisheries.   

Assessment of biomass export from marine protected areas and its impacts on fisheries in the Western Mediterranean Sea

http://www.repositorio.ieo.es/e-ieo/bitstream/10508/5672/1/Planes_etal_2007.pdf

Assessment of biomass export from marine protected areas and its impacts on fisheries in the Western Mediterranean Sea

Abstract

Similar works

Full text

Available Versions

Repositorio Institucional Digital del IEO