Search

Your search keyword '"Dorothée Kopp"' showing total 56 results
Start Over Author "Dorothée Kopp"
56 results on '"Dorothée Kopp"'

51. Evaluation of algal regulation by herbivorous fishes on Caribbean coral reefs

Author

Claude Bouchon, Dorothée Kopp, Yolande Bouchon-Navaro, Alexandre Haouisée, Max Louis, Sébastien Cordonnier, Dynamique des écosystèmes Caraïbe et biologie des espèces associées (DYNECAR EA 926), and Université des Antilles et de la Guyane (UAG)

Subjects
0106 biological sciences, Caribbean, geography, Herbivore, Algal consumption, Coral reefs, geography.geographical_feature_category, Resilience of coral reefs, Ecology, 010604 marine biology & hydrobiology, Coral reef, Aquatic Science, Biology, Oceanography, 010603 evolutionary biology, 01 natural sciences, Fishery, Herbivorous fishes, Herbivory pressure, Marine protected area, 14. Life underwater, Aquaculture of coral, Environmental issues with coral reefs, Coral reef protection, Reef
Abstract

International audience; The role of herbivorous fishes in maintaining low macroalgal cover was evaluated on coral reefs on several reef sites from Guadeloupe, either protected or not. Grazing by herbivorous fishes was assessed on different algal facies using fish-bite counts. Algal consumption by fish was estimated as well as algal production. Bite counts revealed that herbivorous fishes feed preferentially on algal turf and avoid brown macroalgae. The algal consumption varied between 0.4 and 2.8 g m days and was higher inside marine protected areas than outside. Comparison with algal production revealed that herbivorous fishes did not succeed in regulating algal growth. The insufficient number of grazers may lead to the dominance of stable assemblages of macroalgae on coral reefs, preventing the recovery of reef into previous coral-dominated ecosystems.

Published
2009
Full Text
View/download PDF

52. Contribution of anadromous fish to the diet of European catfish in a large river system

Author

Dorothée Kopp, Jari Syväranta, Aurélia Martino, Régis Céréghino, Julien Cucherousset, Frédéric Santoul, Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Bournemouth University [Poole] (BU), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Bournemouth University - BU (UNITED KINGDOM), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
0106 biological sciences, food.ingredient, Biodiversité et Ecologie, Population, Cyprinidae, Mixing model, Fresh Water, Biology, Alosa alosa, 010603 evolutionary biology, 01 natural sciences, food, Predatory fish, Rivers, Animals, Allis shad, Anadromous fish, 14. Life underwater, Muscle, Skeletal, education, Catfishes, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, Migration, Stable isotopes, Population Density, Fish migration, Alosa, education.field_of_study, 010604 marine biology & hydrobiology, Fishes, Silurus glanis, General Medicine, biology.organism_classification, Spawn (biology), Diet, Europe, Fishery, Predatory Behavior, Forage fish, France, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Catfish
Abstract

International audience; Many anadromous fish species, when migrating from the sea to spawn in fresh waters, can potentially be a valuable prey for larger predatory fish, thereby efficiently linking these two ecosystems. Here, we assess the contribution of anadromous fish to the diet of European catfish (Silurus glanis) in a large river system (Garonne, southwestern France) using stable isotope analysis and allis shad (Alosa alosa) as an example of anadromous fish. Allis shad caught in the Garonne had a very distinct marine delta(13)C value, over 8 per thousand higher after lipid extraction compared to the mean delta(13)C value of all other potential freshwater prey fish. The delta(13)C values of European catfish varied considerably between these two extremes and some individuals were clearly specializing on freshwater prey, whereas others specialized on anadromous fish. The mean contribution of anadromous fish to the entire European catfish population was estimated to be between 53% and 65%, depending on the fractionation factor used for delta(13)C.

Published
2009
Full Text
View/download PDF

53. Environmental effects related to the local absence of exotic fish

Author

Jordi Figuerola, Frédéric Santoul, Régis Céréghino, Jari Syväranta, Dorothée Kopp, Arthur Compin, Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Estacion Biologica, Estación Biológica de Doñana (EBD), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centre National de la Recherche Scientifique - CNRS (FRANCE), Consejo Superior de Investigaciones Científicas - CSIC (SPAIN), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)

Subjects
0106 biological sciences, Environmental management, Biodiversité et Ecologie, General Linear Modelling, Exotic species, Introduced species, Land cover, General linear modelling, 010603 evolutionary biology, 01 natural sciences, Invasive species, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Rivers, 14. Life underwater, Biological invasions, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, Nature and Landscape Conservation, Ecologie, Environnement, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Land use, Ecology, 010604 marine biology & hydrobiology, Land-cover, Aquatic animal, 15. Life on land, Geography, Ecosystèmes, 13. Climate action, Plant cover, Species richness, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Global biodiversity
Abstract

Given the extent of biological invasions in industrialized countries, our understanding of the determi- nants of overall patterns of biological invasions could gain most from consideration of why exotic species are absent from some areas, rather than from distribution patterns of exotic species. Fish communities were sampled at 381 sites representing 221 rivers in the Adour-Garonne stream system (116 000 km2, SW France). Very few rivers were not colonized by exotic fish species, however, on a local basis, only 33% of the sampling sites hosted exotics. Using General Linear Modelling, we found that patterns of exotic fish (occurrence, number of species, proportion within assemblage) responded to both land-use and physical variables, whereas patterns of native fish only responded to the local meso-scale characteristics of each stream reach from headwaters to mouth. All fish communities were susceptible to invasion regardless of native species richness, and higher native species richness did not decrease the opportunity for establishment by exotic species. The likelihood that exotic fish are absent primarily increased with elevation and with lower human influence upon the land cover, while human-impacted landscapes (agri- cultural and urban areas) were more likely to host exotic fish and higher numbers of exotic species. In light of urban and agricultural development, our ability to detect responses of exotic species to landscape alterations using a combination of simple physical and land cover variables exemplifies a cost-effective technique for assessing areas at greater invasion risk in large stream systems.

Published
2009
Full Text
View/download PDF

54. Trophic ecology of the pikeperch (Sander lucioperca) in its introduced areas : a stable isotope approach in southwestern France

Author

Régis Céréghino, Dorothée Kopp, Frédéric Santoul, Julien Cucherousset, Jari Syväranta, Aurélia Martino, Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Bournemouth University - BU (UNITED KINGDOM), Bournemouth University [Poole] (BU), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
0106 biological sciences, Biodiversité et Ecologie, Non-native species, 010603 evolutionary biology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Predation, Predatory fish, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, Rivers, Animals, Tarn River, 14. Life underwater, Lot River, Catfishes, Esox, ComputingMilieux_MISCELLANEOUS, Isotope analysis, Trophic level, Ecological niche, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Ecologie, Environnement, Carbon Isotopes, Ecology, Nitrogen Isotopes, General Immunology and Microbiology, biology, 010604 marine biology & hydrobiology, General Medicine, Interspecific competition, Trophic position, biology.organism_classification, Fishery, Predators, Piscivorous, Ecosystèmes, Perches, Predatory Behavior, Guild, Esocidae, France, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, General Agricultural and Biological Sciences, Garonne basin
Abstract

International audience; During the last decades, non-native predatory fish species have been largely introduced in European lakes and rivers, calling for detailed information on the trophic ecology of co-existing native and non-native predators. The present study describes the trophic ecology of the introduced pikeperch (Sander lucioperca) in two southwestern French rivers, using stable isotope analysis. Pikeperch could be categorized as a top-predator, and had a significantly higher trophic position (TP, mean±SE=4.2±0.1) compared to other predatory fish such as the native pike (Esox lucius, TP=3.7±0.1) and the introduced European catfish (Silurus glanis, TP=3.8±0.1). Most studies of resource use in freshwaters consider predatory fish as ecologically equivalent; however, this study showed that the pikeperch occupied a higher trophic niche compared to other predatory species in the Lot and Tarn rivers (Garonne River basin). This apparent specialization may thus have consequences upon interspecific relationships within the predatory guild and upon the functional organization of biological communities.

Published
2009
Full Text
View/download PDF

55. Some expected impacts of the Common Fishery Policy on marine food webs.

Author

Dorothée, Kopp, Marianne, Robert, Tiphaine, Chouvelon, and Sonia, Méhault

Subjects
FISHERY policy, MARINE ecology, FOOD chains, COMPARATIVE studies, PREDATION
Abstract

For the ecosystem approach to fisheries management, understanding population dynamics and ecosystem resilience in response to the landing obligation acted by the reform of the European Common Fishery Policy (CFP) is currently an important avenue of research. This study attempts to assess the impact of the new CFP on marine food webs. Total carbon and nitrogen loss induced by a discard ban were estimated for the ecosystem of the Bay of Biscay based on French At-Sea Observer data and carbon and nitrogen content of discarded fish. Changes in predator diets were estimated by comparing two Bayesian mixing models, one mimicking the current situation and the second the application of the new CFP (removing the discarded species that would be landed from the model). Results illustrate a substantial shift in predation effort toward remaining available prey. The impact of changes in diet on individual and population health and on ecosystem functioning are important issues that remain to be assessed. A sister study could be carry out in another ecoregion, at a finer spatial scale in order to compare impacts and ecosystem responses. European monitoring programs such as DC-MAP and the Marine Strategy Framework Directive (MSFD) would help us to gain an understanding of how the food web would reorganize itself. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

56. French ichthyological records for 2018

Author

Iglésias, Samuel P. and Patricia Bergot, Pascal Breton, Stéphanie Brunelle, Mathieu Camusat, Romain Causse, Éric Charbonnel, Pierre Chevaldonné, Yves Cordier, Paul Cosquer, Jean-Pierre Cuillandre, Amelia Curd, Rémy Dubas, Muriel Duhau, Sandrine Derrien-Courtel, Gabriel Devique, Stéphane Dixneuf, Erwan Duhamel, Pierre-André Farque, Patrice Francour†, Yann Fontana, Adelaïde Gamon, Charly Gicqueau, Nicolas Goascoz, Sami Hassani, Angélique Jadaud, Dorothée Kopp, Laure Lamour, Sylvain Le Bris, Laurent Lévèque, Pablo Liger, Pascal Lorance, Patrick Louisy, Vincent Maran, Sonia Méhault, Luisa Metral, Alizée Morin-Repinçay, Olivier Mouchel, Anthony Pere, Jean-Claude Quéro, Julien P. Renoult, François Roche, Livier Schweyer, Jérôme Spitz, Pierre Thiriet, Wilfried Thomas

Subjects
First record, New record, Distribution, Expansion, Fishes, Northeastern Atlantic, Mediterranean, 14. Life underwater
Abstract

Uncommon records of fishes may evidence local or global changes in fish composition resulting from environmental change or anthropogenic activities. Significant records of uncommon marine fishes, including migrant, non-native, cryptic, rare and threatened species, collected in French waters or by French vessels in European waters, observed by scuba divers or beachgoers, are reported for the year 2018. They include first, new, rare and unusual records for the following 52 species: Hexanchus griseus, Squatina squatina, Gymnura altavela, Acipenser sturio, A. gueldenstaedtii, Dalophis imberbis, Nemichthys curvirostris, Eurypharynx pelecanoides, Maulisia mauli, M. microlepis, Sagamichthys schnakenbecki, Melanostomias bartonbeani, Astronesthes niger*, Leptostomias gladiator*, Chlorophthalmus agassizi, Magnisudis atlantica, Evermannella balbo, Regalecus glesne, Luvarus imperialis, Raniceps raninus, Fistularia cf. petimba*, Trigla lyra, Lepidotrigla dieuzeidei, Micrenophrys lilljeborgii, Howella atlantica*, Pomatomus saltatrix, Serranus cabrilla, Caranx crysos, Seriola rivoliana, Trachinotus ovatus, Lobotes surinamensis, Sarpa salpa, Chelon ramada, Pseudoscopelus altipinnis*, Trachinus draco, Parablennius pilicornis, P. ruber, Buenia affinis, B. jeffreysii, Chromogobius zebratus, Didogobius splechtnai, Gammogobius steinitzi, Gobius couchi, G. kolombatovici, Lebetus sp., Speleogobius trigloides, Thorogobius macrolepis, Vanneaugobius dollfusi, Siganus rivulatus*, Lepidocybium flavobrunneum, Hyperoglyphe sp. et Pegusa cf. nasuta, among which six, marked with an asterisk (*), represent additions to the Checklist of the marine fishes from metropolitan France and one, N. curvirostris, is a first record for the Mediterranean.

Catalog

Books, media, physical & digital resources
See catalog results