|
|
|
Registros recuperados: 29 | |
|
|
Derolez, Valerie; Bec, Béatrice; Grillas, Patrice; Sanchez, Ana Elena; Raimbault, Patrick. |
In the context of WFD implementation on Mediterranean lagoons, work has been carried out since 2010 by Ifremer, Tour du Valat and IRSTEA (Onema and AERM & C fundings), to assess the relevance of macrophytes and macrofauna indicators for oligohaline and mesohaline lagoons (mean salinity <18 PSU). The question of the relevance of indicator metrics and thresholds for the "phytoplankton" biological quality element also arises, especially due to the confined nature of olgo-mesohaline lagoons. The objective of this study is to characterize the abundance and composition of phytoplankton on 5 oligo and mesohaline lagoons of the French Mediterranean coast (Scamandre, Crey, Charnier, Bolmon and Grand Palun). Analyses of accessory pigments (chlorophyll and... |
Tipo: Text |
Palavras-chave: Lagunes; Méditerranée; Oligohalin; Mésohalin; Phytoplancton; Cytométrie; Pigments chlorophylliens; Lagoons; Mediterranean Sea; Oligohaline; Mesohaline; Phytoplankton; Cytometry; Chlorophyll pigments.. |
Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00357/46816/46682.pdf |
| |
|
|
Hahn,Norma Segatti; Almeida,Vera Lúcia Lescano de; Luz,Karla Danielle Gaspar da. |
Hoplosternum Uttorale (Hancock, 1828) is an abundant species in the lagoons of the upper Paraná river floodplain. This species was sampled in Patos and Guaraná lagoons in the flood period (November/92-May/93) and low water period (June-October/93). To analyse food contents in the diet were analysed stomach of 91 adults. Twenty seven food items were recorded, among them, Testaceae, Nematoda, microcrustaceans, quironomids and organic detritus were predominant. These items allows to characterize the species as bentivore. To study feeding activity were analized 565 adults stomach contents. Food intake was more intense during flooding. Considering diel variation, the species started to eat during dusk, increasing during night, stopping to eat during daytime. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluriformes; Callichthyidae; Hoplosternum Uttorale; Feeding; Diel cycle; Lagoons. |
Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100005 |
| |
|
|
Albaret, J.J.; Ecoutin, J.-M.. |
La réouverture artificielle de la passe de Grand-Bassam, pratiquée en septembre 1987 dans le but de limiter la prolifération des végétaux aquatiques, a modifié l'environnement et la structure des peuplements ichtyologiques de la partie orientale de la lagune Ebrié (Côte d'Ivoire). Les résultats de deux séries d'observations réalisées en mai 1988 montrent une élévation notable de la salinité et une augmentation de la composante marine au sein des peuplements de poissons par rapport à la situation antérieure (années de référence: 1980 et 1981). |
Tipo: Journal Contribution |
Palavras-chave: Lagoons; Communication; Sea; Environmental impact. |
Ano: 1991 |
URL: http://hdl.handle.net/1834/5371 |
| |
|
|
Radwan, A.M.; Khalil, M.K.; El-Moselhy, K.M.. |
Twelve samples were collected from the surface sediments of lagoon and adjacent Mediterranean Sea. Samples were analyzed for grain size, total organic carbon (TOC), total carbonate (CaCO3), various forms of phosphorus and heavy metals (Fe, Mn, Zn, Cu, Ni, Co, Cd and Pb). The results indicated that the sediments were composed of sand, silt and clay enriched with carbonate (1.95 – 34.1%) and total organic carbon (0.06 and 3.62%). The total-P content ranged between 58 and 1186 μg/g, and the fraction associated with apatite minerals (PHCl) was the dominant (it constitutes about 50 – 73% of TP) implying that it was the main storage of phosphate. The various P phases demonstrated significant positive correlation with mean size, silt, clay, TOC, CaCO3 and TP,... |
Tipo: Journal Contribution |
Palavras-chave: Field Study; Sediments; Heavy metals; Lagoons; Heavy metals; Http://aims.fao.org/aos/agrovoc/c_2223. |
Ano: 2007 |
URL: http://hdl.handle.net/1834/1888 |
| |
|
| |
|
| |
|
| |
|
|
Ragonha,Flávio Henrique; Pinha,Gisele Daiane; Petsch,Danielle Katharine; Mansur,Maria Cristina Dreher; Takeda,Alice Michiyo. |
The Ilha Grande National Park, Paraná, Brazil, is located in the Upper Paraná River and has characteristics typical of a floodplains. This protected area includes lagoons connected and disconnected to the Paraná River, although the latter also connect during periods of high water level, thus composing a heterogeneous group of lacustrine environments. The enormous potential the flora and fauna diversities are still little known to the region, as can be seen through benthic invertebrates, inclunding bivalves mollusks. The granulometric composition of these floodplain lagoons was formed mainly by mud and very fine sand. Furthermore, organic matter composition was predominantly of fine particulate. The other abiotic factors differed from lagoons located within... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplains; Lagoons; Native species; Invaders. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000100002 |
| |
|
|
Romdhane, M.S.; Ben Rejeb-Jenhani, A.. |
La détérioration de la qualité des eaux de la lagune de Boughrara, conséquence de divers apports polluants et d’échanges d’eaux limités avec la mer, s’est traduite par un accroissement sévère de l’eutrophisation du milieu se manifestant notamment par d’importantes proliférations microalgales. L’analyse de l’évolution de l’ensemble des groupes phytoplanctoniques a montré que les périodes de forte biomasse algale sont caractérisées par des développements monospécifiques. L’importance relative croissante de la classe des dinoflagellés se manifestent par un net accroissement du rapport dinoflagellés / diatomées. Le très fort développement de l’espèce Gymnodinium cf nagasakiense , (densités maximales de l’ordre de 6.10 6 cellules par litre ) espèce connue... |
Tipo: Journal Contribution |
Palavras-chave: Diatoms; Environmental factors; Lagoons; Phytoplankton; Geographical distribution. |
Ano: 2002 |
URL: http://hdl.handle.net/1834/236 |
| |
|
|
Dupouy, Cécile; Röttgers, Rüdiger; Tedetti, Marc; Frouin, Robert; Lantoine, François; Rodier, Martine; Martias, Chloe; Goutx, Madeleine. |
New Caledonia (Southwest Pacific), like all tropical Pacific Island countries, is impacted by weather events, climate change, and local anthropogenic forcing. Strong erosion of particles and dissolved organic matter (DOM) from ultramafic rocks, associated with trace metals dissemination (i.e., nickel, manganese and cobalt), potentially affects lagoon waters and coral reefs surrounding the main island. The CALIOPE (CALedonian Inherent Optical PropErties) cruises were performed along the Eastern Lagoon of New Caledonia (ELNC) (400 km, 13 transects from Bay to open ocean, 51 stations) during contrasted meteorological conditions: a dry period (October 2011), a windy situation (March 2014), and a strong rainy event (March 2016). CDOM absorption and fluorescence... |
Tipo: Text |
Palavras-chave: Chromophoric dissolved organic matter; Fluorescence; New Caledonia; Tropical Pacific; Lagoons; Biooptics; Phytoplankton; Rivers. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00620/73166/72352.pdf |
| |
|
| |
|
| |
|
|
Fiori,Leandro Fabrício; Alves,Gustavo Henrique Zaia; Hahn,Norma Segatti; Benedito,Evanilde. |
Abstract This study investigated the diet of four characids [Hyphessobrycon eques (Steindachner, 1882), Odontostilbe pequira (Steindachner, 1882), Psellogrammus kennedyi (Eigenmann, 1903) and Serrapinnus calliurus (Boulenger, 1900) ] coexisting in two lagoons and checked for possible spatial differences and the influence on population fitness. The main goal was check if these species show better fitness according to the nutritional value of the food resource consumed. In this way, it is expected that the species show improved nutritional conditions (evidenced by the relative condition factor) when foraging for items of animal origin, and the reverse is expected when consuming items of plant origin and detritus. Sampling was conducted in August 2011. The... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fishes; Diet; Condition factor; Pantanal; Lagoons. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100206 |
| |
|
| |
|
|
Mensi, F.; Ksouri, J.; Hammami, W.; Romdhane, M.S.. |
L'algue rouge, Gracilaria verrucosa, a été cultivée, durant le printemps 2009, en mode suspendu à différents emplacements et profondeurs représentant les différences biogéochimiques de la lagune de Bizerte au Nord de la Tunisie. La concentration et la distribution des nutriments (ammonium, phosphate) dans l'eau, ainsi que la salinité, la température, l’oxygène et la transparence de l’eau ont été déterminées. Les méthodes analytiques internationales standardisées ont été appliquées. Les effets du mode de culture, de l’emplacement et de la profondeur sur les rendements en poids, protéines, R-Phycoérythrine et sucres totaux de l’algue ont été étudiés. La croissance de Gracilaria a été similaire dans les différents sites mais plus lente dans les profondeurs... |
Tipo: Journal Contribution |
Palavras-chave: Algal culture; Ammonium compounds; Biochemical composition; Biogeochemistry; Carbohydrates; Dissolved oxygen; Environmental conditions; Growth; Intensive culture; Lagoons; Off-bottom culture; Raw materials; Red algae; Biogeochemical cycle. |
Ano: 2009 |
URL: http://hdl.handle.net/1834/4497 |
| |
|
|
Falk, T.M.; Teugels, G.G.. |
The West African coastal zone is rich in estuaries and lagoons. Estuaries are abundant in the area from the mouth of Senegal to Guinea (e.g., Sine Saloum, Casamance); lagoons are generally present from Cote d'Ivoire to the Niger Delta in Nigeria (e.g., Ebrie Lagoon, Porto Novo Lagoon, Lagos Lagoon). Because of their important diversity, it is difficult to give their physical and biological definitions. They are all, however, characterized by a typical and rich fish species composition |
Tipo: Proceedings Paper |
Palavras-chave: Fish species; Coastal zone; Lagoons; Estuaries. |
Ano: 2000 |
URL: http://hdl.handle.net/1834/737 |
| |
|
| |
|
|
Baleux, B.; Caumette, P.; Trousselier, M.. |
Numeration, biomass, distribution within time, some physiological characters and a taxonomical outline, with a standardized micro method, of aerobic hétérotrophie bacteria isolated from sediments an waters, from fishponds of "Domaine de Certes" (Arcachon) from june 1977 to may 1978 are described. Number of hétérotrophie bacteria evolved in a significant way, according to seasons, and bacterial biomass is higher in the sediments than in the waters. Metabolic or physiological differences (proteolysis, denitrification) appeared among populations due to the origin of sediments. Moreover the qualitative study pointed out taxonomical units as Bacillus associated to seasons, or Agrobacterium associated to vegetable detritical sediments. |
Tipo: Text |
Palavras-chave: Lagunes; Bactéries hétérotrophes aerobies; Biomasse; Taxonomie; Micro méthode; Enzymatiques; Lagoons; Aerobic heterotrophic bacteria; Biomass; Taxonomy; Enzymatic micro methods. |
Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00306/41677/40886.pdf |
| |
|
| |
|
|
Gaudy, R; Pagano, M. |
The zooplankton of an eutrophic brackish lagoon (Etang de Berre), near Marseille (France) was studied during an annual cycle. It was characterized by large populations of a pelagic copepod (Acartia tonsa ). Grazing on natural particles by this species was investigated. Adults were able to use an extended range of particle sizes, but showed selectivity for particles concentration was observed (14 mu m). Temperature and particles concentration appear to modify the selectivity behavior. Juvenile stages could also catch particles of various size but did not show the same selectivity for the peak particles as adults. Daily food ration was high comparatively to open-sea copepods. Taking into account several results obtained on food ration, egg production and... |
Tipo: Text |
Palavras-chave: Copepoda; Lagoons; Energy budget; Seasonal variations; Particle concentration; Zooplankton; Food availability; Temperature effects; Nutrition. |
Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1526.pdf |
| |
Registros recuperados: 29 | |
|
|
|