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4 results on '"Hubert-Jean Ceccaldi"'

1. Analysis of initial fouling process in coastal environment: effects of settlement, attachment, and metamorphosis promoters

Author

Eric Delort, Hubert Jean Ceccaldi, Hideo Etoh, Naoharu Watanabe, and Kanzo Sakata

Subjects
Larva, animal structures, Fouling, biology, Ecology, media_common.quotation_subject, fungi, biology.organism_classification, Applied Microbiology and Biotechnology, Mytilus, Balanus, Biofouling, Environmental chemistry, parasitic diseases, Metamorphosis, Halocynthia, Blue mussel, media_common
Abstract

Effects of lumichrome, L-tryptophan, and curcumin on fouling organisms were examined on panels immersed in a near-shore aquatic environment. These products showed effective action in aquariums in preliminary screening tests for promoting different steps of fouling. Lumichrome showed metamorphosis-inducing activity for ascidian larvae (Halocynthia), L-tryptophan was a settlement-inducer for larvae of barnacles (Balanus), and curcumin showed attachment-promoting activity on the blue mussel (Mytilus). In order to establish that these tests are helpful in screening actual fouling or antifouling compounds, we examined the action of these three compounds in a coastal environment by following the first steps of biofouling, that is, by studying the quantity of chlorophyll, the number of bacterial cells, and the larvae settled. These experiments on the seashore indicated that these compounds did not act as promoters for the target organisms; however, they did show promoting effects on some nontarget organisms.

Published
2000

2. The Influence of water salinity on the free amino acid concentration in muscle and hepatopancreas of adult shrimps, Penaeus japonicus

Author

Carl-Henrik Brogren, Christakis Marangos, Elisabeth Alliot, and Hubert-Jean Ceccaldi

Subjects
chemistry.chemical_classification, biology, Ecology, Decapoda, biology.organism_classification, Biochemistry, Crustacean, Amino acid, Salinity, chemistry, Animal ecology, Osmoregulation, Hepatopancreas, Penaeus, Food science, Ecology, Evolution, Behavior and Systematics
Abstract

Variations of the total free amino acid (FAA) pool and the content of specific amino acids have been measured in the muscle and hepatopancreas of adult shrimps, Penaeus japonicus , acclimatized at five water salinities: 38, 32, 26, 20 and 14%‰ The FAA content is always higher in muscle than in hepatopancreas at all tested salinites. On the other hand, the hepatopancreas exhibits the highest concentrations of essential amino acids. Two steps in the evolution of FAA content can be observed, the first one regarding decrease in salinity from 38 to 20%‰ and the second one, when salinity goes below 20% ° . The first step can be characterized by a 16% decrease of total FAA content in the muscle and a 36% increase in the hepatopancreas. In muscle, the variations are mainly due to changes in non-essential FAA content, whereas in the hepatopancreas, they are linked to variations in essential FAA content. The other step is characterized by a drastic increase in moisture and decrease in FAA content in both studied organs when water salinity is 14%‰ The total FAA content is about 40% lower in shrimps at 14% ° compared to 38%‰ seawater salinity. During adaptation, the FAA pool (mainly NEFAAs) of muscle seems to be directly related to osmoregulation, whereas in the hepatopancreas, its evolution seems to be linked with energy expenditure and protein synthesis. The results are evaluated in order to elucidate the role of FAA in intracellular osmoregulation and in relation to animal ecology.

Published
1989
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3. From data to End-to -End Models:15 years of research to describe the dynamics of exploited marine ecosystems in the Eastern Channel

Author

Martin Huret, Sandrine Vaz, Olivier Le Pape, Stéphanie Mahévas, Loïc Gasche, Morgane Travers-Trolet, Raphael Girardin, Paul Marchal, Laboratoire Ressources halieutiques Manche Mer du nord, IFREMER Centre Manche Mer du Nord, (HMMN), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Écologie et Modèles pour l'halieutique (EMH), Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Unité de recherche Sciences et Technologies Halieutiques (STH), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), Hubert-Jean Ceccaldi, Yves Hénocque, Yasuyuki Koike, Teruhisa Komatsu, Georges Stora, Marie-Hélène Tusseau-Vuillemin, Écologie et Modèles pour l'Halieutique (IFREMER EMH), Institut Français de Recherche pour l'Exploitation de la Mer - Atlantique (IFREMER Atlantique), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire Ressources halieutiques Boulogne sur mer (LRHBL), Halieutique Manche Mer du Nord (HMMN), Écologie et Modèles pour l'Halieutique (EMH), and Sciences et Technologies Halieutiques (STH)

Subjects
0106 biological sciences, 010504 meteorology & atmospheric sciences, Ecosystem modelling, Flatfish, 01 natural sciences, Eastern English Channel, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, End-to-end principle, Ecosystem, Marine ecosystem, 14. Life underwater, Sound (geography), 0105 earth and related environmental sciences, Abiotic component, geography, geography.geographical_feature_category, Spatial analyses, business.industry, Ecology, 010604 marine biology & hydrobiology, Environmental resource management, [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery, Environmental science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business, Communication channel
Abstract

Proceedings of the 15th French-Japanese Oceanography Symposium; International audience; Considerable research has been conducted in the past 15 years around the Eastern English Channel ecosystem. Data collected since the 1970s on the biotic and abiotic compartments have been collated and mapped out in the mid-2000. This spatially explicit information formed a sound basis to improve knowledge on, and model, the functioning and dynamics of key ecosystem compartments, with a focus on flatfish species and fisheries and their interactions with other sectors of activity (aggregate extractions, maritime traffic). The more recent ongoing works are dedicated to the integration of those processes into several complementary end-to-end ecosystem models.

Published
2015
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4. The Management of Mediterranean Coastal Habitats: A Plea for a Socio-ecosystem-Based Approach

Author

Mireille Harmelin-Vivien, Daniel Faget, Thierry Thibaut, Thomas Changeux, Jean Blanchot, Richard Sempéré, Sandrine Ruitton, Vanina Pasqualini, Charles-François Boudouresque, Marc Pagano, Adrien Goujard, Aurelie Blanfuné, Francois Carlotti, Daniela Bănaru, Michèle Perret-Boudouresque, Elodie Rouanet, Delphine Thibault, Patrick Astruch, Laurence Le Direach, Diversité, évolution et écologie fonctionnelle marine (DIMAR), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, Institut Pythéas (OSU PYTHEAS), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), UR CYROCO (IRD/ARVAM), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU), Sciences pour l'environnement (SPE), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), GIS Posidonie, Ecosystèmes Côtiers Marins et Réponses aux Stress (ECOMERS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA), Ecologie Marine et BIOdiversité (EMBIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Océanographie Physique et Biologique (LOPB), Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Temps, espaces, langages Europe méridionale-Méditerranée (TELEMME), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD [Réunion]), Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Côte d'Azur (UCA), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), ICEMASA, University of Cape Town, Université Nice Sophia Antipolis (1965 - 2019) (UNS), Hubert-Jean Ceccaldi, Yves Hénocque, Teruhisa Komatsu, Patrick Prouzet, Benoit Sautour, and Jiro Yoshida

Subjects
0106 biological sciences, [SDV]Life Sciences [q-bio], Biodiversity, Mediterranean, 010603 evolutionary biology, 01 natural sciences, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Marine ecosystem, Ecosystem, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, biodiversity, Abiotic component, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Ecology, 010604 marine biology & hydrobiology, Pelagic zone, 15. Life on land, environmentalist lobbies, [SDE.ES]Environmental Sciences/Environmental and Society, Habitat, 13. Climate action, Benthic zone, [SDE]Environmental Sciences, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, socio-ecosystem, management, Global biodiversity
Abstract

International audience; Biodiversity is often defined erroneously as the number of species. The higher the number of species, the better the status or the health of a habitat is considered to be. Managers, stakeholders and environmentalists worldwide often prioritize the ‘species approach’. The protection of an iconic and endearing species is obviously easier than that of tiny zooplankton species, although the latter may play a far more important role than the former in the functioning of healthy ecosystems. The species approach has been widely favoured compared to the ecosystem approach. However, ‘species-by-species’ management is unrealistic. The problem is that the management of natural habitats is often driven by environmentalist lobbies on the basis of taxonomy (e.g. mammals, turtles, birds, iconic fish, flowering plants, etc.) and disciplinary lobbies (biology, benthos, pelagos, contaminants, currents, etc.). Ecosystems are units of biological and spatial organization that include all the organisms, their interactions, the functional compartments they belong to, along with the components of the abiotic environment. The concept of the socio-ecosystem is useful insofar as it emphasizes the fact that man is part of ecosystems. Here, the authors make use of four case studies, in the Mediterranean Sea, in an attempt to demonstrate the interest of a comprehensive, socio-ecosystem-based approach in the field of environmental management. They also highlight the importance of tackling the coupling between benthic and pelagic ecosystems and between terrestrial and marine ecosystems.

Published
2020
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