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Auteur DRUON, J.-N.; FROMENTIN, J.-M.; AULANIER, F.; HEIKKONEN, J.
Titre Potential feeding and spawning habitats of Atlantic bluefin tuna in the Mediterranean Sea Type Article scientifique
Année 2011 Publication Marine Ecology-progress Series Revue Abrégée
Volume (down) 439 Numéro Pages 223-240
Mots-Clés Habitat mapping; Bluefin tuna; Thunnus thynnus; Feeding; Spawning; Mediterranean Sea; Remote sensing; Satellite data
Résumé Atlantic bluefin tuna Thunnus thynnus (ABFT) is a fish of high market value which has recently become strongly overexploited, notably in the Mediterranean Sea. This area is an essential habitat for ABFT reproduction and growth. We present here an approach for deriving the daily mapping of potential ABFT feeding and spawning habitats based on satellite-derived sea surface temperature (SST) and chl a concentration. The feeding habitat was mainly derived from the simultaneous occurrence of oceanic fronts of temperature and chl a content while the spawning habitat was mostly inferred from the heating of surface waters. Generally, higher chl a contents were found to be preferred for the feeding habitat and a minimum SST value was found for the spawning habitat. Both habitats were defined by the presence of relevant oceanographic features and are therefore potential and functionally-linked habitats. This approach provides, for the first time, a synoptic view of the potential ABFT habitats in the Mediterranean Sea. The model performs well in areas where both satellite data and ABFT observations are available, as 80% of presence data are in the vicinity of potential habitats. The computed monthly, seasonal and annual maps of potential feeding and spawning habitat of ABFT from 2003 to 2009 are in good agreement with current knowledge on ABFT. Overall, the habitat size of ABFT is about 6% of the Mediterranean Sea surface. The results displayed a strong seasonality in habitat size and locations as well as high year-to-year variations (30 to 60%), particularly for the potential spawning habitat, which is key information for evaluating the utility of ABFT Marine Protected Areas in the Mediterranean Sea.
Adresse IFREMER, Ctr Rech Halieut Mediterraneen & Trop, F-34203 Sete, France.
Auteur institutionnel Thèse
Editeur Inter-research Lieu de Publication Éditeur
Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0171-8630 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ 16053 collection 1003
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Auteur Albouy, C.; Mouillot, D.; Rocklin, D.; Culioli, J.M.; Loc'h, F.L.
Titre Simulation of the combined effects of artisanal and recreational fisheries on a Mediterranean MPA ecosystem using a trophic model Type Article scientifique
Année 2010 Publication Revue Abrégée Marine Ecology – Progress Series
Volume (down) 412 Numéro Pages 207-221
Mots-Clés activities; Artisanal; cascades; Ecopath; Ecosim; Epinephelus; fisheries; marginatus; Mediterranean; Mpa; Recreational; Sea; Trophic; with
Résumé Marine protected areas (MPAs) have the potential to enhance the long-term sustainability of coastal resources, and the artisanal fisheries which depend on them. However, recreational fisheries, which are increasing their impacts on coastal resources worldwide, may reduce the benefits that MPAs provide to declining artisanal fisheries. Here we used the Bonifacio Straits Natural Reserve (BSNR) Corsica as a study case to simulate the combined effects on coastal resources of artisanal and recreational fishing efforts. The BSNR ecosystem was modelled using mass-balance modelling of trophic interactions. This model was compared to another built on a non-protected area from the same region. We aggregated fishing fleets into artisanal and recreational categories, and we simulated various combinations of fishing effort over a 20 yr dynamic simulation using Ecosim. We showed that fishing activities have an additional top-down effect on the food web and that they decrease the targeted group's biomass, such as piscivorous species. We found, for some trophic groups, non-trivial patterns of biomass variation through trophic cascades. Our trophic approach revealed that some groups may suffer a biomass decrease when MPAs are set or enforced, due to the combined effect of artisanal and recreational fisheries. Overall, our results illustrate the value of modelling to manage MPAs, as a complementary tool to surveys. Models provide the opportunity to anticipate the potential consequences, at the ecosystem level, of socio-political decisions that aim to sustain coastal resources while managing artisanal and recreational fisheries.
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Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
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ISSN 0171-8630 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 55
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Auteur van der Geest, M.; van Gils, J.A.; van der Meer, J.; Olff, H.; Piersma, T.
Titre Suitability of calcein as an in situ growth marker in burrowing bivalves Type Article scientifique
Année 2011 Publication Revue Abrégée Journal of Experimental Marine Biology and Ecology
Volume (down) 399 Numéro Pages 1-7
Mots-Clés Daily growth rate in situ fluorescent marking Intertidal mudflat Lucinidae Mark-and-recapture Seagrass banc-darguin marking mauritania scallop oxytetracycline abundance shells rates fish age
Résumé The fluorochrome calcein has been used in numerous growth studies of molluscs to internally mark calcified structures. Because of interspecific variations in marking success and possible effects on growth performance, methodological assessments of the suitability of calcein as a growth marker, especially in field contexts, remain necessary. Here we report on the effects of different calcein concentrations (100, 200, 400 and 800 mg l(-1) on fluorescent mark deposition, growth rate, density, body condition and size-frequency distribution of an intertidal infaunal bivalve species, Loripes lacteus (Linnaeus, 1758), using an outdoor immersion technique. To avoid stress caused by handling and transportation, in situ enclosures were placed at seagrass-covered patches during low tide, to which calcein solutions were added. After a 1.3- to 2.6-h period of exposure to calcein, the enclosures were removed. Sites were sampled three months later. All calcein concentrations produced live L. lacteus with a clear fluorescent shell mark, but the percentage successfully marked tended to increase with higher calcein concentrations. Furthermore, marking success and growth rate decreased significantly with shell size (i.e., age). Calcein concentration did not measurably affect shell growth rate, body condition and size-frequency distribution, but the numerical densities were lower for sites treated with calcein concentrations >= 400 mg l(-1). Our results suggest that in situ calcein-marking of burrowing lucinid bivalves with low concentrations (100-200 mg l(-1)) is a non-invasive and rapid method to determine growth rate, provided that the lucinids are not too old. (c) 2011 Elsevier B.V. All rights reserved.
Adresse [van der Geest, Matthijs; van Gils, Jan A.; van der Meer, Jaap; Piersma, Theunis] NIOZ Royal Netherlands Inst Sea Res, Dept Marine Ecol, NL-1790 AB Den Burg, Texel, Netherlands. [van der Meer, Jaap] Free Univ Amsterdam, Dept Theoret Biol, NL-1081 HV Amsterdam, Netherlands. [Olff, Han] Univ Groningen, Ctr Ecol & Evolutionary Sci CEES, Community & Conservat Ecol Grp, NL-9700 CC Groningen, Netherlands. [Piersma, Theunis] Univ Groningen, Ctr Ecol & Evolutionary Sci CEES, Anim Ecol Grp, NL-9700 CC Groningen, Netherlands. van der Geest, M (reprint author), NIOZ Royal Netherlands Inst Sea Res, Dept Marine Ecol, POB 59, NL-1790 AB Den Burg, Texel, Netherlands Matthijs.van.der.Geest@nioz.nl
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Editeur Lieu de Publication Éditeur
Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0022-0981 ISBN Médium
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Notes ISI Document Delivery No.: 745QC Times Cited: 0 Cited Reference Count: 33 van der Geest, Matthijs van Gils, Jan A. van der Meer, Jaap Olff, Han Piersma, Theunis Nwo-wotro[w.01.65.221.00] We thank the authorities of the Parc National du Banc d'Arguin (PNBA) for the opportunity to carry out this research on the intertidal flats of PNBA and for the use of facilities at the Iwik field station. Logistical help from Lemhaba Ould Yarba in Nouakchott is much appreciated. We also thank the inhabitants of the Biological Station in Iwik, especially Sidi Ely, Sall Mamdou Alassane and Ahmedou Ould Lameime for their cheerful contribution and co-operation. We are grateful to Tamar Lok and two anonymous referees for constructive comments. We thank Henrike Andresen for help with the development of the calcein-marking method and Amrit Cado van der Lelij who made a large contribution to the work in the laboratory. Joana Cardoso helped with shell preparation. We are grateful to the staff of Laboratoire de Sclerochronologie des Animaux Aquatiques (LASAA) for their assistance with making Fig. 1B and C. Allert Bijleveld, Geert Aarts and all participants of the NIOZ April 2010 Mixed-Effect modeling course of Alain Zuur and Elena N. Ieno are thanked for their constructive comments on statistics. Dick Visser produced the final figures. This study was financed by NWO-WOTRO Integrated Programme grant W.01.65.221.00 to TP. [ST] Elsevier science bv Amsterdam Approuvé pas de
Numéro d'Appel MARBEC @ alain.herve @ 712 collection 1380
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Auteur Grüss, A.; Palomares, M.L.D.; Poelen, J.H.; Barile, J.R.; Aldemita, C.D.; Ortiz, S.R.; Barrier, N.; Shin, Y.-J.; Simons, J.; Pauly, D.
Titre Building bridges between global information systems on marine organisms and ecosystem models Type Article scientifique
Année 2019 Publication Revue Abrégée Ecological Modelling
Volume (down) 398 Numéro Pages 1-19
Mots-Clés Ecosystem model; FishBase; Osmose; SeaLifeBase; Web application; Web application programming interface
Résumé To facilitate the wider implementation of ecosystem modeling platforms and, thereby, to help advance ecosystem-based fisheries management (EBFM) worldwide, tools delivering a large quantity of inputs to ecosystem models are needed. We developed a web application providing OSMOSE ecosystem models with values for trophic, growth and reproduction parameters derived from data from two global information systems (FishBase and SeaLifeBase). Our web application guides the user through simple queries to extract information from FishBase and SeaLifeBase data archives, and it delivers all the configuration files necessary for running an OSMOSE model. Here, we present our web application and demonstrate it for the West Florida Shelf ecosystem. Our software architecture can serve as a basis for designing other advanced web applications using FishBase and SeaLifeBase data in support of EBFM.
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Editeur Lieu de Publication Éditeur
Langue Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0304-3800 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2520
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Auteur Chassot, E.; Duplisea, D.; Hammill, M.; Caskenette, A.; Bousquet, N.; Lambert, Y.; Stenson, G.
Titre Role of predation by harp seals Pagophilus groenlandicus in the collapse and non-recovery of northern Gulf of St. Lawrence cod Gadus morhua Type Article scientifique
Année 2009 Publication Revue Abrégée Mar. Ecol.-Prog. Ser.
Volume (down) 379 Numéro Pages 279-297
Mots-Clés cod; functional response; harp seal; model; predation; recovery
Résumé A statistical catch-at-age model was developed to assess the effects of predation by the northwest Atlantic harp seal population on northern Gulf of St. Lawrence cod by estimating the relative importance of different sources of mortality that affected the stock during a period of collapse and non-recovery. Cod recruitment at age 1 is modeled via a non-linear stock-recruitment relationship based on total egg production and accounts for changes in female length-at-maturity and cod condition. Natural mortality other than seal predation also depends on cod condition used as an integrative index of changes in environmental conditions. The linkage between seals and cod is modeled through a multi-age functional response that was derived from the reconstruction of the seal diet using morphometric relationships and stomach contents of more than 200 seals collected between 1998 and 2001. The model was fitted following a maximum likelihood estimation approach to a scientific survey abundance index (1984 to 2006). Model results show that the collapse of the northern Gulf of St. Lawrence cod stock was mainly due to the combination of high fishing mortality rates and poor environmental conditions in the early to mid-1990s contributing to the current state of recruitment overfishing. The increase in harp seal abundance during 1984 to 2006 was reflected by an increase in predation mortality for the young cod age-groups targeted by seals. Although current levels of predation mortality affect cod spawning biomass, the lack of recovery of the NGSL cod stock seems mainly due to the very poor recruitment.
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Editeur Lieu de Publication Éditeur
Langue Eng Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0171-8630 ISBN Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel LL @ pixluser @ collection 15
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