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Registros recuperados: 108
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Découverte inédite d'un lamantin d'Afrique échoué au niveau de l'Aire MArine Protégée (AMP) de Joal-Fadiouth OceanDocs
Ndoye, A,; Dossa, J.; Mané, A.H..
Joal, la ville rendue célébre dans le monde entier par les pôêmes du défunt poéte président sénégalais, LéopoldSédar Senghor, a été le théatre de la découverte inédite d'un lamantin d'Afrique échoué sur ses rivages. La découverte, faite en début mai 2007 au niveau de l'une des toutes premières AMPs sénégalaises, est une preuve irréfutable de la présence de ces mammifères marins sur la Petite Côte Sénégalaise. Votre revue Diiso revient sur ce scoop écologique un mois jour pour jour avant la célébration de la 35e Journée Mondiale de l'Environnement (JME 2007)
Tipo: Journal Contribution Palavras-chave: Mangroves; Marine parks; Marine environment; Marine environment; Mangroves; Marine parks; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_16190; Http://aims.fao.org/aos/agrovoc/c_36402.
Ano: 2007 URL: http://hdl.handle.net/1834/2355
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Défis de la surveillance des maladies chez les coquillages marins en France ArchiMer
Lupo, Coralie; Francois, Cyrille; Arzul, Isabelle; Garcia, Celine; Joly, Jean-pierre; Renault, Tristan.
The basic concepts and objectives of animal disease surveillance are common to all types of animal production. Yet, the procedures for implementation have been mostly developed for terrestrial animal productions. Disease surveillance in marine shellfish calls for specific measures in view of the peculiarities of marine biology and rearing techniques. The main objective of disease surveillance in marine shellfish is to detect as early as possible exotic and newly emerging diseases. With this objective in mind, a national surveillance network for surveillance of mollusc diseases called Repamo has been developed. It combines passive reporting and risk-based surveillance.
Tipo: Text Palavras-chave: Surveillance; Coquillage; Milieu marin; Détection précoce; Epidémiologie; Surveillance; Shellfish; Marine environment; Early detection.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00109/22023/19653.pdf
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Determination of methanesulfonic acid and non-sea-salt sulfate in single marine aerosol particles OMA
Kolaitis, L.N.; Bruynseels, F.; Van Grieken, R.; Andreae, M.O..
In open ocean waters the predominant volatile sulfur compound is dimethyl sulfide (DMS), representing almost 90% of the marine sulfur emissions. Methanesulfonic acid (MSA), one of the oxidation products of DMS, is consequently an important constituent of marine aerosols. Laser microprobe mass analysis (LAMMA) has been used for single-particle analysis of particles collected in the marine boundary layer. MSA, like the non-sea-salt sulfate, is mainly associated with the smallest aerosol particles, whose LAMMA spectra match the reference fingerprint spectra of MSA salts, sodium methanesulfonate and ammonium methanesulfonate. The presence of nitrate and heavy metal ions in the LAMMA spectra can reveal, to a certain extent, the degree of air pollution at the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerosols; Air pollution; Boundary layers; Heavy metals; Marine environment; Nitrates; Particle size; Sulphates.
Ano: 1989 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3177
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Determination of nitrate ion in marine biotopes with high nitrate content by ultraviolet spectrophotometry OMA
Mertens, J.; Massart, D.L..
A simple and rapid method for the determination of nitrate in seawater of high nitrate content (>1 ppm) is proposed. The absorption of the nitrate ion is measured at 210 and 220 mµ. The sample is treated with a measured quantity of hydrochloric acid to eliminate the carbonate and bicarbonate interferences and measured against a nitrate free blank prepared by reduction of the nitrate to ammonia with Raney nickel. The addition of HCl permits also storage of the sample without special precautions and the use of the blank eliminates the most serious of the interferences (bromide) expected in seawater. The interference of organic matter limits however the applicability of the method to concentrations higher than 1 ppm.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Marine environment; Nitrates; Spectroscopy.
Ano: 1971 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3424
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Diagnostic de la contamination chimique de la faune halieutique des littoraux des Antilles françaises. Campagnes 2008 en Martinique et en Guadeloupe ArchiMer
Bertrand, Jacques; Abarnou, Alain; Bocquene, Gilles; Chiffoleau, Jean-francois; Reynal, Lionel.
During the years 1972-1993, kepone a persistent pesticide has been used in the banana fields of the French West Indies (Martinique and Guadeloupe) to content a weevil. A slow desorption of the molecule from soil induces its transfer to the sea through the rivers from leaching and erosion. This study intended to take stock on the contamination by kepone of the fishery species around the islands fifteen years after the kepone ban. Furthermore other chemical pollutants were sought in fish and shellfish around the Martinique island. The results confirmed persistence of marine fauna contamination by kepone, mainly in the alluvium areas in front of polluted rivers. They shown also that this contamination may spread more widely but with fast decreasing through...
Tipo: Text Palavras-chave: Antilles; Chlordécone; Pollution chimique; Environnement marin; Caribbean; Kepone; Chemical pollution; Marine environment.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/rapport-6896.pdf
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Dinámica del ultrafitoplancton en el Mar Argentino OceanDocs
Silva, R.I..
Ultraphytoplankton is composed by a group of organisms phylogenetically diverse, which contribute significantly to the total biomass and primary production in different oceanic and coastal pelagic systems. The success of ultraphytoplankton is attributed to its high efficiency in capturing light and nutrients, due to their small cell size and low sinking rate. The community structure is driven by the interaction among biotic and abiotic variables, such as temperature, nutrients, light and predators. The objective of this work was to assess the ecological importance of ultraphytoplankton organisms at the EPEA station, situated in the Buenos Aires coastal pelagic system (Argentina, SW Atlantic), during the period 2000-2009. In particular, ultraphytoplankton...
Tipo: Theses and Dissertations Palavras-chave: Phytoplankton; Seasonal variations; Environmental factors; Community composition; Biomass; EPEA; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4504
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Dinophysis acuminate (dinophyceae), une espèce à géométrie variable sur les côtes françaises ArchiMer
Lassus, Patrick; Marcaillou-le Baut, Claire.
Tipo: Text Palavras-chave: Morphologie; Variabilité; Ultrastructure; Croissance; France; Dinophysis acuminata; Europe; Milieu marin; Zone côtière; Phytoplancton; Pyrrophycophyta; Algae; Thallophyta; Morphology; Variability; Ultrastructure; Growth; France; Europe; Marine environment; Coastal zone; Phytoplankton; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00133/24468/22484.pdf
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Distribución batimétrica, espacial y temporal del macrozoobentos en el Canal Beagle, Tierra del Fuego, Argentina OceanDocs
Diez, M..
El Canal Beagle (Tierra del Fuego, Argentina) se encuentra en el sistema de canales fueguinos que representa el ambiente marino subantártico costero más estrechamente relacionado con la Antártida. Además, el Canal Beagle constituye una vía de intercambio de fauna y flora ente los océanos Pacífico y Atlántico. El objetivo de este trabajo fue determinar la composición, abundancia y biomasa del macrozoobentos en el Canal Beagle como también la producción secundaria de los ensambles bentónicos. Durante 1999 y 2000, en forma estacional, en tres áreas diferentes y en dos rangos de profundidad: 40m y 70m, se tomaron muestras del macrozoobentos mediante el uso de una rastra epibentónica. Los organismos se identificaron y cada taxón se contó y pesó para determinar...
Tipo: Theses and Dissertations Palavras-chave: Zoobenthos; Seasonal distribution; Abundance; Biomass; Secondary production; Marine environment; Biomass; Marine environment; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_15487.
Ano: 2006 URL: http://hdl.handle.net/1834/3545
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Distribución de desovantes y estimación de variables reproductivas del efectivo norteño de merluza (Merluccius hubbsi) (35º'S-41º'S) durante mayo de 2009 OceanDocs
Rodrigues, K.A.; Macchi, G.J..
Spawning and reproductive variables of the northern hake stock were analyzed using macroscopic and histologic gonad information derived from samples collected in May 2009. The study includes estimates of batch fecundity, spawning frequency, oocyte dry weight and size at first maturity. During May 2009 the reproductive activity of the northern hake stock took place mainly near the 50 m isobath, north of 37° S. Spawning occurred within a temperature range of 9 °C-15 °C that coincided with a bottom thermal front. Size at first maturity, much lower than that reported at the beginning of the 1980s, showed differences between males (27.16 cm TL) and females (32.84 cm TL). The reproductive frequency was estimated at one spawning every 13 days and mean batch...
Tipo: Journal Contribution Palavras-chave: Stocks; Spawning populations; Histology; Fecundity; Gadoid fisheries; Merluccius hubbsi; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4883
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Distribución y abundancia de huevos y larvas de langostino patagónico (Pleoticus muelleri) (Penaeoidea, Solenoceridae) en las temporadas estivales de 2008 y 2009 OceanDocs
Moriondo Danovaro, P..
The study on distribution and abundance of eggs and early planktonic stages of red shrimp, Pleoticus muelleri (Bate, 1888), contributes to a better knowledge of the species dynamics. Results from processing and analyzing 72 plankton samples collected with Bongo net during two research cruises on board of FV “Arbumasa XVIII” and RV “Capitán Oca Balda”, carried out in the Patagonian littoral in March 2008 and January 2009, are presented. In both cruises, eggs and larval stages were found all over the study area. The highest punctual densities of eggs were recorded in the area known as “La Pared” (46° 45’ S-65° 55’ W and 46° 50’ S-65° 55’ W). Eggs indicate the presence of shrimp reproductive concentrations which, while migrating eastwards towards waters of...
Tipo: Journal Contribution Palavras-chave: Fish larvae; Eggs; Abundance; Fishery surveys; Pleoticus muelleri; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4880
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Ecología trófica del congrio de profundidad Bassanago albescens (Barnard, 1923) en el Atlántico Sudoccidental (35º'S-45º'S) OceanDocs
Izzo, L.P..
Los hábitos alimentarios del congrio de profundidad Bassanago albescens fueron estudiados por medio del análisis de los contenidos estomacales. Las muestras provinieron de campañas de investigación llevadas a cabo por el Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) durante el año 2009, en dos zonas de la Plataforma Continental Argentina (Norte: 36°S-41°S y Sur: 44°S-47°S). De los 222 estómagos analizados, 189 (83,78%) contenían alimento, identificándose un total de 34 ítems presa agrupados en 7 categorías. Los valores de %IRI indicaron que la principal categoría presa de la dieta fueron los cefalópodos, seguidos por isópodos y anfípodos. Se estableció la existencia a nivel poblacional de una tendencia hacia una estrategia generalista...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Food organisms; Predator prey interactions; Trophic levels; Stomach content; Bassanago albescens; Marine environment.
Ano: 2010 URL: http://hdl.handle.net/1834/5157
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Ecología trófica del gatuzo, Mustellus schmitti (Springer 1939), en el Mar Argentino OceanDocs
Belleggia, M..
The narrownose smoothhound shark Mustelus schmitti is a benthic shark distributed from Florianópolis (27°S, Brazil) to Deseado River Estuary (47º45´S, Argentina) and occurs from shallow waters to 120m. This Thesis describes the feeding ecology of narrownose smoothhound shark M. schmitti in northern Argentinean Continental Shelf and is structured in four chapters. Chapter 1 contains an introduction and includes purpose, theory and concepts. In Chapter 2, the food habits of M. schmitti were studied based on analysis of stomach contents from specimens collected during the years 2008-2011. Of a total of 959 stomachs sampled during this period, 944 (98,43%) contained food. Prey items were identified to the lowest possible taxonomic level, counted and weighted....
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Trophic levels; Stomach content; Predator prey interactions; Ontogeny; Shark fisheries; Mustellus schmitti; Polychaeta; Marine environment.
Ano: 2012 URL: http://hdl.handle.net/1834/4775
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Ecología trófica del lenguado Paralichthys patagonicus (Jordan, 1889) en el Ecosistema Costero Argentino-Uruguayo OceanDocs
Troccoli, G.H..
Se determinaron los hábitos alimentarios y la composición de la dieta del lenguado patagónico Paralichthys patagonicus (Jordan, 1889) a partir de análisis cualitativos y cuantitativos del contenido estomacal. Los ejemplares provinieron de 16 muestreos de desembarque de la flota comercial realizados entre febrero de 2009 y abril de 2010 en el puerto de Mar del Plata (Prov. Buenos Aores, Argentina). Se analizaron un total de 828 lenguados de los cuales el 61,8% (512) fueron hembras y 36,7% (304) machos. Del total de estómagos analizados, el 32,9% (272) presentó alimento (184 hembras y 84 machos). Paralichthys patagonicus es un predador ictiófago de amplio espectro trófico (20 ítems presas). Anchoíta (Engraulis anchoita) fue la presa más consumida, seguida...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Trophic levels; Predator prey interactions; Population structure; Stomach content; Paralichthys patagonicus; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4522
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Ecotoxicological testing for the marine environment: report on an international Symposium held in Belgium in 1983 OMA
Persoone, G.; Jaspers, E.; Claus, C..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecotoxicology; Marine environment; Toxicity tests.
Ano: 1986 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3224
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Efecto de la predación de Noctiluca scintillans Macartney, Sagitta friderici Ritter-Záhony y larvas de Engraulis anchoita Hubbs-Marini sobre la comunidad planctónica costera bonaerense OceanDocs
Sato, N.E..
Studied the effect of the predation of Noctiluca scintillans, Sagitta friderici and larvae of Engraulis anchoita in planktonic community of the coastal waters off Buenos Aires province from samples obtained of a permanent station EPEA (38°28’ S, 57°41’ W, 48 m depth) from March 2000 through April 2001. The composition of the diet of the three species predators considering appearances quantitative and qualitative was determined. It found that N. scintillans consumed mainly diatoms and copepod eggs. The alimentary index varied between 27.50% and 77.00%. The highest value corresponded to September, 2000. The analyses of the diets of S. friderici and of the larvae of E. anchoita indicated that both consume mainly different stages of development of the same...
Tipo: Theses and Dissertations Palavras-chave: Zooplankton; Fish larvae; Feeding behaviour; Predation; Seasonal variations; Food organisms; Predator prey interactions; Engraulis anchoita; Noctiluca scintillans; Sagitta friderici; Marine environment.
Ano: 2008 URL: http://hdl.handle.net/1834/4778
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Efecto del alga invasora Undaria pinnatifida sobre la comunidad de peces de arrecife en los golfos Norpatagónicos OceanDocs
Irigoyen, A.J..
This study investigates the impact of Undaria pinnatifida on the reef fish assemblage associated with the coastal rocky reefs of Golfo Nuevo in northern Patagonia, Argentina. Undaria pinnatifida is a laminarian kelp, indigenous to the temperate regions of Japan, China and Korea. It has spread around the world by international shipping and has also been introduced in some regions for mariculture. Its expansion into the northern Patagonian gulfs and Peninsula Valdes, a UNESCO Natural Heritage Site, may threaten eco-tourism activities that depend on local biodiversity and the esthetic quality of the ecosystem. In particular, there is concern about the impact of Undaria on a variety of recreational activities including diving, angling and spear fishing, which...
Tipo: Theses and Dissertations Palavras-chave: Reef fish; Ecological associations; Introduced species; Habitat; Environmental impact; Environmental monitoring; Census; Undaria pinnatifida; Marine environment.
Ano: 2010 URL: http://hdl.handle.net/1834/4774
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Effects of subsidised distant water fleets on the marine environment and local people in Western Africa OceanDocs
Zeba, S..
These last years, while adressing marine conservation problems in Western Africa, 3 major issues were generally raised by our local partners: -Most of the distant water fleets fishing in the coastal waters of other countries do not often abide by the international standards of responsible fishing; -The number of distant water fleets is steadily increasing in the Exclusive Economic Areas of developing countries; -Theses fleets have tremendous ecological and economic consequences, which resulted in a crisis of fishery management. Yet it is thanks to fishing agreements that distant water fleets have legal access to the fish resources of developing coastal countries.More important: it is thanks to subsidies that the behaviours of distant water fleets have such...
Tipo: Report Palavras-chave: Distant water fisheries; Overfishing; Marine environment.
Ano: 2000 URL: http://hdl.handle.net/1834/650
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El rol del frente de mareas de Península Valdés en el control de la comunidad zooplanctónica OceanDocs
Derisio, C..
The Península Valdés tidal front was studied in its rol in the control of the spatial distribution, abundance, assemblages, diversity and life histories of the zooplankton community using samples from two oceanographic surveys. Although the front showed in general high zooplankton abundances, highest values, mainly due to the presence of immature stages of copepods, were recorded in the transitional and stratified zones coinciding with highest values of chlorophyll a. The zooplankton groups showed a distinctive spatial distribution across the front. The results showed that this front did not exert any control on zooplankton composition and diversity, but did on the abundance. In the homogeneous zone the harpacticoid copepods were more abundant, followed by...
Tipo: Theses and Dissertations Palavras-chave: Zooplankton; Ecological associations; Oceanic fronts; Abundance; Species diversity; Hydrography; Vertical migrations; Copepoda; Cladocera; Marine environment.
Ano: 2012 URL: http://hdl.handle.net/1834/4777
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Enhancing environmental awareness through marine education OceanDocs
Collins, M.A.J..
Throughout this colloquium reference has been made to a number of environmental problems, most of them due to human activities (e.g. clearing mangrove forests, dynamite fishing, sewage pollution, etc.). While attempts are being made to correct these problems through new legislation and educating adults in more environmentally friendly practices, it is my thesis that we should be putting much more effort into the environmental education of young, school-age children since such efforts will, in the long run, have the greater impact on environmental awareness.
Tipo: Working Paper Palavras-chave: Marine environment; Education; Environment; Http://aims.fao.org/aos/agrovoc/c_2488; Http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 1998 URL: http://hdl.handle.net/1834/590
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Environmental Design and Analysis in Marine Environmental Sampling OceanDocs
Underwood, A.J..
The IOC-IMO-UNEP/GIPME Groups of Experts on Effects of Pollution (GEEP) has been working for a number of years on promoting new ways of understanding how pollutants affect marine biological systems. A major initial focus of GEEP was on calibration workshops where different methods were tested against one another. The Oslo (1986), Bermuda (1988) and Bremerhaven (1992) workshop publications are widely regarded as benchmarks demonstrating that biological effects methods are reliable tools for measurement of the effects of pollutants discharged to the marine environment. IOC through GEEP, in cooperation with UNEP, has published a series of manuals based on the successful techniques and these are listed at the back of this volume. Monitoring programmes for...
Tipo: Book Palavras-chave: Marine Environment; Environmental monitoring; Environment management; Variability; Marine environment; Measurement; Environmental monitoring; Marine environment; Measurement; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_4668.
Ano: 1996 URL: http://hdl.handle.net/1834/2794
Registros recuperados: 108
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