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Rouyer T, Bonhommeau S, Bernard S, Kerzerho V, Derridj O, Bjarnason Á, Allal H, Steffensen JF, Deguara S, Wendling B, Bal G, Thambithurai D, Mckenzie DJ. A NOVEL PROTOCOL FOR RAPID DEPLOYMENT OF HEART RATE DATA STORAGE TAGS IN ATLANTIC BLUEFIN TUNA THUNNUS THYNNUS REVEALS CARDIAC RESPONSES TO TEMPERATURE AND FEEDING. J Fish Biol 2023. [PMID: 37483116 DOI: 10.1111/jfb.15507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 07/25/2023]
Abstract
The Atlantic bluefin tuna (ABFT) is a highly prized species of large pelagic fish. Studies of their environmental physiology may improve understanding and management of their populations, but this is difficult for mature adults because of their large size. Biologging of heart rate holds promise in investigating physiological responses to environmental conditions in free-swimming fishes but it is very challenging to anaesthetise large ABFT for invasive surgery to place a tag in the body cavity near to the heart. We describe a novel method for rapid deployment of a commercially available heart rate tag (HR-tag) on ABFT, using an atraumatic trocar to implant it in the musculature associated with the cleithrum. We performed three sequential experiments to show that the tagging method 1) is consistently repeatable and reliable; 2) can be used successfully on commercial fishing boats and does not seem to affect fish survival, and 3) is effective for long-term deployments. In experiment 3, a tag logged heart rate over 80 days on a 60-kg ABFT held in a farm cage. The logged data showed that heart rate was sensitive to prevailing seasonal temperature and feeding events. At low temperatures, there were clear responses to feeding but these all disappeared above a threshold temperature of 25.5 °C. Overall, the results show that our method is simple, rapid and repeatable, and can be used for long term experiments to investigate physiological responses by large ABFT to environmental conditions. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- T Rouyer
- MARBEC, Univ Montpellier, CNRS, IFREMER, IRD, Sète, France
| | - S Bonhommeau
- IFREMER DOI, rue Jean Bertho, 97822 Le Port, La, Réunion
| | - S Bernard
- LIRMM, Univ. Montpellier, CNRS, Montpellier, France
| | - V Kerzerho
- LIRMM, Univ. Montpellier, CNRS, Montpellier, France
| | - O Derridj
- MARBEC, Univ Montpellier, CNRS, IFREMER, IRD, Sète, France
| | | | - H Allal
- University Hospital of Montpellier, Montpellier, France
| | - J F Steffensen
- Marine Biological Section, University of Copenhagen, Strandpromenaden 5, 3000 Elsinore, Denmark
| | - S Deguara
- AquaBioTech Group, 'Central Complex', Naggar Street, Targa Gap, Mosta MST 1761, MALTA, G.C
| | - B Wendling
- SATHOAN, 29, promenade J.B. Marty, 34200, Sète, France
| | - G Bal
- UMS PatriNat (OFB-CNRS-MNHN), 4 rue du Petit Château, 91800, Brunoy, France
| | - D Thambithurai
- MARBEC, Univ Montpellier, CNRS, IFREMER, IRD, Sète, France
| | - D J Mckenzie
- MARBEC, Univ Montpellier, CNRS, IFREMER, IRD, Sète, France
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Sardenne F, Bodin N, Metral L, Crottier A, Le Grand F, Bideau A, Brisset B, Bourjea J, Saraux C, Bonhommeau S, Kerzérho V, Bernard S, Rouyer T. Effects of extraction method and storage of dry tissue on marine lipids and fatty acids. Anal Chim Acta 2019; 1051:82-93. [DOI: 10.1016/j.aca.2018.11.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/29/2018] [Accepted: 11/05/2018] [Indexed: 11/30/2022]
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Durif CM, Bonhommeau S, Briand C, Browman HI, Castonguay M, Daverat F, Dekker W, Diaz E, Hanel R, Miller MJ, Moore A, Paris CB, Skiftesvik AB, Westerberg H, Wickström H. Whether European eel leptocephali use the Earth’s magnetic field to guide their migration remains an open question. Curr Biol 2017; 27:R998-R1000. [DOI: 10.1016/j.cub.2017.08.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bauer RK, Fromentin JM, Demarcq H, Brisset B, Bonhommeau S. Co-Occurrence and Habitat Use of Fin Whales, Striped Dolphins and Atlantic Bluefin Tuna in the Northwestern Mediterranean Sea. PLoS One 2015; 10:e0139218. [PMID: 26458254 PMCID: PMC4601798 DOI: 10.1371/journal.pone.0139218] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/10/2015] [Indexed: 11/28/2022] Open
Abstract
Different dolphin and tuna species have frequently been reported to aggregate in areas of high frontal activity, sometimes developing close multi-species associations to increase feeding success. Aerial surveys are a common tool to monitor the density and abundance of marine mammals, and have recently become a focus in the search for methods to provide fisheries-independent abundance indicators for tuna stock assessment. In this study, we present first density estimates corrected for availability bias of fin whales (Balaenoptera physalus) and striped dolphins (Stenella coeruleoalba) from the Golf of Lions (GoL), compared with uncorrected estimates of Atlantic bluefin tuna (ABFT; Thunnus thynnus) densities from 8 years of line transect aerial surveys. The raw sighting data were further used to analyze patterns of spatial co-occurrence and density of these three top marine predators in this important feeding ground in the Northwestern Mediterranean Sea. These patterns were investigated regarding known species-specific feeding preferences and environmental characteristics (i. e. mesoscale activity) of the survey zone. ABFT was by far the most abundant species during the surveys in terms of schools and individuals, followed by striped dolphins and fin whales. However, when accounted for availability bias, schools of dolphins and fin whales were of equal density. Direct interactions of the species appeared to be the exception, but results indicate that densities, presence and core sighting locations of striped dolphins and ABFT were correlated. Core sighting areas of these species were located close to an area of high mesoscale activity (oceanic fronts and eddies). Fin whales did not show such a correlation. The results further highlight the feasibility to coordinate research efforts to explore the behaviour and abundance of the investigated species, as demanded by the Marine Strategy Framework Directive (MSFD).
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Affiliation(s)
- Robert Klaus Bauer
- IFREMER (Institut Français de Recherche pour l’Exploitation de la MER), Resarch Unit Marbec (Marine Biodiversity, Exploitation and Conservation), Sète, France
| | - Jean-Marc Fromentin
- IFREMER (Institut Français de Recherche pour l’Exploitation de la MER), Resarch Unit Marbec (Marine Biodiversity, Exploitation and Conservation), Sète, France
- * E-mail:
| | - Hervé Demarcq
- IRD (Institut de Recherche pour le Développement), Resarch Unit Marbec (Marine Biodiversity, Exploitation and Conservation), Sète, France
| | - Blandine Brisset
- IFREMER (Institut Français de Recherche pour l’Exploitation de la MER), Resarch Unit Marbec (Marine Biodiversity, Exploitation and Conservation), Sète, France
| | - Sylvain Bonhommeau
- IFREMER (Institut Français de Recherche pour l’Exploitation de la MER), Resarch Unit Marbec (Marine Biodiversity, Exploitation and Conservation), Sète, France
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Nieblas AE, Drushka K, Reygondeau G, Rossi V, Demarcq H, Dubroca L, Bonhommeau S. Defining Mediterranean and Black Sea biogeochemical subprovinces and synthetic ocean indicators using mesoscale oceanographic features. PLoS One 2014; 9:e111251. [PMID: 25360783 PMCID: PMC4216069 DOI: 10.1371/journal.pone.0111251] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 09/26/2014] [Indexed: 11/24/2022] Open
Abstract
The Mediterranean and Black Seas are semi-enclosed basins characterized by high environmental variability and growing anthropogenic pressure. This has led to an increasing need for a bioregionalization of the oceanic environment at local and regional scales that can be used for managerial applications as a geographical reference. We aim to identify biogeochemical subprovinces within this domain, and develop synthetic indices of the key oceanographic dynamics of each subprovince to quantify baselines from which to assess variability and change. To do this, we compile a data set of 101 months (2002–2010) of a variety of both “classical” (i.e., sea surface temperature, surface chlorophyll-a, and bathymetry) and “mesoscale” (i.e., eddy kinetic energy, finite-size Lyapunov exponents, and surface frontal gradients) ocean features that we use to characterize the surface ocean variability. We employ a k-means clustering algorithm to objectively define biogeochemical subprovinces based on classical features, and, for the first time, on mesoscale features, and on a combination of both classical and mesoscale features. Principal components analysis is then performed on the oceanographic variables to define integrative indices to monitor the environmental changes within each resultant subprovince at monthly resolutions. Using both the classical and mesoscale features, we find five biogeochemical subprovinces for the Mediterranean and Black Seas. Interestingly, the use of mesoscale variables contributes highly in the delineation of the open ocean. The first axis of the principal component analysis is explained primarily by classical ocean features and the second axis is explained by mesoscale features. Biogeochemical subprovinces identified by the present study can be useful within the European management framework as an objective geographical framework of the Mediterranean and Black Seas, and the synthetic ocean indicators developed here can be used to monitor variability and long-term change.
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Affiliation(s)
- Anne-Elise Nieblas
- Unité Mixte Recherche Ecosystèmes Marins Exploités 212, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Sète, France
- * E-mail:
| | - Kyla Drushka
- Applied Physics Laboratory, University of Washington, Seattle, Washington, United States of America
| | - Gabriel Reygondeau
- Center for Macroecology, Evolution and Climate, National Institute for Aquatic Resources, Technical University of Denmark (DTU Aqua), Charlottenlund, Copenhagen, Denmark
| | - Vincent Rossi
- Instituto de FÍsica Interdisciplinary Sistemas Complejos, Institute for Cross-Disciplinary Physics and Complex Systems, (CSIC-UIB), Campus Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - Hervé Demarcq
- Unité Mixte de Recherche Ecosystèmes Marins Exploités 212, Institut de Recherche pour le Développement (IRD), Sète, France
| | - Laurent Dubroca
- European Commission, Joint Research Center, Institute for Environment & Sustainability, Water Resources, Ispra, Italy
| | - Sylvain Bonhommeau
- Unité Mixte Recherche Ecosystèmes Marins Exploités 212, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Sète, France
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Hanel R, Stepputtis D, Bonhommeau S, Castonguay M, Schaber M, Wysujack K, Vobach M, Miller MJ. Low larval abundance in the Sargasso Sea: new evidence about reduced recruitment of the Atlantic eels. Naturwissenschaften 2014; 101:1041-54. [PMID: 25307845 DOI: 10.1007/s00114-014-1243-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 09/16/2014] [Accepted: 09/17/2014] [Indexed: 10/24/2022]
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Miller MJ, Bonhommeau S, Munk P, Castonguay M, Hanel R, McCleave JD. A century of research on the larval distributions of the Atlantic eels: a re-examination of the data. Biol Rev Camb Philos Soc 2014; 90:1035-64. [PMID: 25291986 DOI: 10.1111/brv.12144] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 07/25/2014] [Accepted: 08/15/2014] [Indexed: 11/28/2022]
Abstract
The spawning areas of the Atlantic freshwater eels were discovered about a century ago by the Danish scientist Johannes Schmidt who after years of searching found newly hatched larvae of the European eel, Anguilla anguilla, and the American eel, Anguilla rostrata, in the southern Sargasso Sea. The discovery showed that anguillid eels migrate thousands of kilometers to offshore spawning areas for reproduction, and that their larvae, called leptocephali, are transported equally long distances by ocean currents to their continental recruitment areas. The spawning sites were found to be related to oceanographic conditions several decades later by German and American surveys from 1979 to 1989 and by a Danish survey in 2007 and a German survey in 2011. All these later surveys showed that spawning occurred within a restricted latitudinal range, between temperature fronts within the Subtropical Convergence Zone of the Sargasso Sea. New data and re-examinations of Schmidt's data confirmed his original conclusions about the two species having some overlap in spawning areas. Although there have been additional collections of leptocephali in various parts of the North Atlantic, and both otolith research and transport modelling studies have subsequently been carried out, there is still a range of unresolved questions about the routes of larval transport and durations of migration. This paper reviews the history and basic findings of surveys for anguillid leptocephali in the North Atlantic and analyses a new comprehensive database that includes 22612 A. anguilla and 9634 A. rostrata leptocephali, which provides a detailed view of the spatial and temporal distributions and size of the larvae across the Atlantic basin and in the Mediterranean Sea. The differences in distributions, maximum sizes, and growth rates of the two species of larvae are likely linked to the contrasting migration distances to their recruitment areas on each side of the basin. Anguilla rostrata leptocephali originate from a more western spawning area, grow faster, and metamorphose at smaller sizes of <70 mm than the larvae of A. anguilla, which mostly are spawned further east and can reach sizes of almost 90 mm. The larvae of A. rostrata spread west and northwest from the spawning area as they grow larger, with some being present in the western Caribbean and eastern Gulf of Mexico. Larvae of A. anguilla appear to be able to reach Europe by entering the Gulf Stream system or by being entrained into frontal countercurrents that transport them directly northeastward. The larval duration of A. anguilla is suggested to be quite variable, but gaps in sampling effort prevent firm conclusions. Although knowledge about larval behaviour is lacking, some influences of directional swimming are implicated by the temporal distributions of the largest larvae. Ocean-atmosphere changes have been hypothesized to affect the survival of the larvae and cause reduced recruitment, so even after about a century following the discovery of their spawning areas, mysteries still remain about the marine life histories of the Atlantic eels.
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Affiliation(s)
- Michael J Miller
- Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan
| | | | - Peter Munk
- National Institute of Aquatic Resources, Technical University of Denmark, Charlottenlund, Denmark
| | - Martin Castonguay
- Maurice-Lamontagne Institute, Fisheries and Oceans Canada, Mont-Joli, Québec G5H 3Z4, Canada
| | | | - James D McCleave
- School of Marine Sciences, University of Maine, Orono, ME, U.S.A
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Kaplan DM, Bach P, Bonhommeau S, Chassot E, Chavance P, Dagorn L, Davies T, Dueri S, Fletcher R, Fonteneau A, Fromentin JM, Gaertner D, Hampton J, Hilborn R, Hobday A, Kearney R, Kleiber P, Lehodey P, Marsac F, Maury O, Mees C, Ménard F, Pearce J, Sibert J. The True Challenge of Giant Marine Reserves. Science 2013; 340:810-1. [DOI: 10.1126/science.340.6134.810-b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- David M. Kaplan
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - Pascal Bach
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | | | - Emmanuel Chassot
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - Pierre Chavance
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - Laurent Dagorn
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - Tim Davies
- Imperial College London, Silwood Park Campus, Ascot SL5 7PY, UK
| | - Sibylle Dueri
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - Rick Fletcher
- Department of Fisheries Research, North Beach, WA 6020, Australia
| | - Alain Fonteneau
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | | | - Daniel Gaertner
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | - John Hampton
- Oceanic Fisheries Programme, Secretariat of the Pacific Community, 98848 Noumea Cedex, New Caledonia
| | - Ray Hilborn
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA
| | - Alistair Hobday
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Marine and Atmospheric Research, Hobart, Tasmania, 7000, Australia
| | - Robert Kearney
- Institute for Applied Ecology, University of Canberra, ACT 2601, Australia
| | - Pierre Kleiber
- U.S. National Marine Fisheries Service (retired), Honolulu, HI 96814, USA
| | - Patrick Lehodey
- Marine Ecosystems Department, Space Oceanography Division, Collecte Localisation Satellites, 31520 Ramonville Saint-Agne, France
| | - Francis Marsac
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
- International Centre for Education, Marine and Atmospheric Sciences over Africa, Department of Oceanography, University of Cape Town, Rondebosch 7701, South Africa
| | - Olivier Maury
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
- International Centre for Education, Marine and Atmospheric Sciences over Africa, Department of Oceanography, University of Cape Town, Rondebosch 7701, South Africa
| | | | - Frédéric Ménard
- In stitut de Recherche pour le Développement (IRD), Unité Mixte de Recherche (UMR) 212 Exploited Marine Ecosystems (EME), 34203 Sète cedex, France
| | | | - John Sibert
- Joint Institute for Marine and At mospheric Research, University of Hawaii, Honolulu, HI 96822, USA
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Simon M, Fromentin JM, Bonhommeau S, Gaertner D, Brodziak J, Etienne MP. Effects of stochasticity in early life history on steepness and population growth rate estimates: an illustration on Atlantic bluefin tuna. PLoS One 2012; 7:e48583. [PMID: 23119063 PMCID: PMC3485314 DOI: 10.1371/journal.pone.0048583] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 10/03/2012] [Indexed: 11/19/2022] Open
Abstract
The intrinsic population growth rate (r) of the surplus production function used in the biomass dynamic model and the steepness (h) of the stock-recruitment relationship used in age-structured population dynamics models are two key parameters in fish stock assessment. There is generally insufficient information in the data to estimate these parameters that thus have to be constrained. We developed methods to directly estimate the probability distributions of r and h for the Atlantic bluefin tuna (Thunnus thynnus, Scombridae), using all available biological and ecological information. We examined the existing literature to define appropriate probability distributions of key life history parameters associated with intrinsic growth rate and steepness, paying particular attention to the natural mortality for early life history stages. The estimated probability distribution of the population intrinsic growth rate was weakly informative, with an estimated mean r = 0.77 (±0.53) and an interquartile range of (0.34, 1.12). The estimated distribution of h was more informative, but also strongly asymmetric with an estimated mean h = 0.89 (±0.20) and a median of 0.99. We note that these two key demographic parameters strongly depend on the distribution of early life history mortality rate (M(0)), which is known to exhibit high year-to-year variations. This variability results in a widely spread distribution of M(0) that affects the distribution of the intrinsic population growth rate and further makes the spawning stock biomass an inadequate proxy to predict recruitment levels.
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Affiliation(s)
- Maximilien Simon
- AgroParistech-ENGREF (École Nationale du Génie Rural des Eaux et des Forêts), Paris, France.
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Cury PM, Boyd IL, Bonhommeau S, Anker-Nilssen T, Crawford RJM, Furness RW, Mills JA, Murphy EJ, Österblom H, Paleczny M, Piatt JF, Roux JP, Shannon L, Sydeman WJ. Global Seabird Response to Forage Fish Depletion—One-Third for the Birds. Science 2011; 334:1703-6. [DOI: 10.1126/science.1212928] [Citation(s) in RCA: 472] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Philippe M. Cury
- Institut de Recherche pour le Développement, UMR EME-212, Centre de Recherche Halieutique Méditerranéenne et Tropicale, Avenue Jean Monnet, BP 171, 34203 Sète Cedex, France
| | - Ian L. Boyd
- Scottish Oceans Institute, University of St Andrews, St Andrews KY16 8LB, UK
| | - Sylvain Bonhommeau
- Ifremer, UMR EME 212, Centre de Recherche Halieutique Méditerranéenne et Tropicale, Avenue Jean Monnet, BP 171, 34203 Sète Cedex, France
| | - Tycho Anker-Nilssen
- Norwegian Institute for Nature Research, Post Office Box 5685 Sluppen, NO-7485 Trondheim, Norway
| | - Robert J. M. Crawford
- Branch Oceans and Coasts, Department of Environmental Affairs, Private Bag X2, Rogge Bay 8012, South Africa
| | - Robert W. Furness
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK
| | | | - Eugene J. Murphy
- British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
| | - Henrik Österblom
- Baltic Nest Institute, Stockholm Resilience Centre, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Michelle Paleczny
- Fisheries Centre, Aquatic Ecosystems Research Laboratory (AERL), 2202 Main Mall, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
| | - John F. Piatt
- U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK 99508, USA
| | - Jean-Paul Roux
- Ecosystem Analysis Section, Ministry of Fisheries and Marine Resources, Lüderitz Marine Research, Post Office Box 394, Lüderitz, Namibia
- Animal Demography Unit, Zoology Department, University of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa
| | - Lynne Shannon
- Marine Research Institute and Zoology Department, University of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa
| | - William J. Sydeman
- Farallon Institute for Advanced Ecosystem Research, Post Office Box 750756 Petaluma, CA 94952, USA
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Chassot E, Bonhommeau S, Dulvy NK, Mélin F, Watson R, Gascuel D, Le Pape O. Global marine primary production constrains fisheries catches. Ecol Lett 2010; 13:495-505. [DOI: 10.1111/j.1461-0248.2010.01443.x] [Citation(s) in RCA: 281] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bonhommeau S, Le Pape O, Gascuel D, Blanke B, Tréguier AM, Grima N, Vermard Y, Castonguay M, Rivot E. Estimates of the mortality and the duration of the trans-Atlantic migration of European eel Anguilla anguilla leptocephali using a particle tracking model. J Fish Biol 2009; 74:1891-1914. [PMID: 20735679 DOI: 10.1111/j.1095-8649.2009.02298.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Using Lagrangian simulations, based on circulation models over three different hydroclimatic periods in the last 45 years in the North Atlantic Ocean, the trans-Atlantic migration of the European eel Anguilla anguilla leptocephali was simulated via the passive drift of particles released in the spawning area. Three different behaviours were modelled: drifting at fixed depth, undergoing a vertical migration or choosing the fastest currents. Simulations included mortality hypotheses to estimate a realistic mean migration duration and relative survival of A. anguilla larvae. The mean migration duration was estimated as 21 months and the mortality rate as 3.8 per year, i.e. < 0.2% of A. anguilla larvae may typically survive the trans-Atlantic migration.
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Affiliation(s)
- S Bonhommeau
- Agrocampus Ouest, UMR 985 INRA-Agrocampus Ouest Ecologie et Santé des Ecosystèmes, Laboratoire d'Ecologie Halieutique, Rennes Cedex, France.
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Moussa NO, Molnár G, Bonhommeau S, Zwick A, Mouri S, Tanaka K, Real JA, Bousseksou A. Selective photoswitching of the binuclear spin crossover compound {[Fe(bt)(NCS)2]2(bpm)} into two distinct macroscopic phases. Phys Rev Lett 2005; 94:107205. [PMID: 15783518 DOI: 10.1103/physrevlett.94.107205] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Indexed: 05/24/2023]
Abstract
The low-spin (LS-LS, S = 0) diamagnetic form of the binuclear spin crossover complex {[Fe(bt)(NCS)(2)](2)(bpm)} was selectively photoconverted into two distinct macroscopic phases at different excitation wavelengths (1342 or 647.1 nm). These long-lived metastable phases have been identified, respectively, as the symmetry-broken paramagnetic form (HS-LS, S = 2) and the antiferromagnetically coupled (HS-HS, S = 0) high-spin form of the compound. The selectivity may be explained by the strong coupling of the primary excited states to the paramagnetic state.
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Affiliation(s)
- N Ould Moussa
- Laboratoire de Chimie de Coordination, CNRS UPR-8241, 205 route de Narbonne, F-31077 Toulouse, France
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Jacquey M, Bonhommeau S, Bouchene MA. Experimental demonstration of phase control of dispersion effects for an ultrashort pulse train propagating in a resonant medium. Opt Lett 2003; 28:1272-1274. [PMID: 12885044 DOI: 10.1364/ol.28.001272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present an experiment in which an ultrashort pulse train propagates resonantly through anoptically dense vapor of atomic rubidium. The sequence obtained from a Fabry-Perot interferometer comprises nearly 10 regularly time-delayed and mode-locked pulses. We show that a sequence with phase shift phi = 0[2pi] between two successive pulses propagates with important temporal distortion, whereas a sequence with phi = pi[2pi] experiences few propagation effects, thus leading for the first time to our knowledge to the possibility of phase control of dispersion effects for an ultrashort pulse train.
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Affiliation(s)
- M Jacquey
- Laboratoire de Collisions Agrégats Réactivité, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5589, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France
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