Freshwater fish

maintain the health of ecosystems. Water quality will be maintained to meet certain minimum standards. These standards will vary depending on location and how the water is to be used. Human actions will not impair the long-term renewability of freshwater stocks and flows. Data on water resources availability, use, and quality will be collected and made accessible to all parties. Institutional mechanisms will be set up to prevent and resolve conflicts over water. Water planning and decision making

Philogenetics Philogenetic Phylogeny Molecular phylogeny Phosphate Phylum (plu. -a) Three-toed foot Pumice Gemstone Semi-precious stone Placoderms Plankton Planktonic Plant Tectonic plates Plateau Platform Plesiomorph Plesiomorphy Feather Cartilaginous fish Pollen Polyphyletic Grassland Precambrian Predator 79 Openmirrors.com Vocabulaire thématique français/anglais La Géologie et La Paléontologie/Geology and Paleontology Préhistorique Primitif Proie Prospecteur minier Prospection géologique

Philogenetics Philogenetic Phylogeny Molecular phylogeny Phosphate Phylum (plu. -a) Three-toed foot Pumice Gemstone Semi-precious stone Placoderms Plankton Planktonic Plant Tectonic plates Plateau Platform Plesiomorph Plesiomorphy Feather Cartilaginous fish Pollen Polyphyletic Grassland Precambrian Predator 79 Vocabulaire thématique français/anglais La Géologie et La Paléontologie/Geology and Paleontology Préhistorique Primitif Proie Prospecteur minier Prospection géologique Provinces géologiques

the lever was fixed to work only for an hour a day, the fish soon learned to activate it at the correct time. A number of similar studies have shown that farmed fish can easily be trained to feed at particular times and places in response to an audible signal. Goldfish don’t swim into the side of the bowl, not because they can see it, but because they are using a pressure-sensing system called the lateral line. Certain species of blind cave fish are able to navigate perfectly well in their lightless

caractéristiques biogéochimiques bien particulières : souvent riche en matière organique et pauvre en oxygène, elle peut être le lieu de dénitrification contribuant à l’épuration des ruisseaux en nitrate (Hill, 1979 ; Swank & Caskey, 1982 ; Grimm & Fisher, 1984 ; Triska et al., 1989 ; Duff & Triska, 1990 ; Claret et al., 1998 ; Lefebvre et al., 2003 ; Storey et al., 2004). En été, saison de risque maximal d’eutrophisation, le bassin versant dans son ensemble est relativement peu connecté au cours d’eau

boring scientific literature * Oikos 116: 723 –727, 2007 doi: 10.1111/j.2007.0030-1299.15674.x, Copyright © Oikos 2007, ISSN 0030-1299 Subject Editor: Per Lundberg, Accepted 25 January 2007 Kaj Sand-Jensen Kaj Sand-Jensen (ksandjensen@bi.ku.dk), Freshwater Biological Laboratory, Univ. of Copenhagen, Helsingørsgade 51, DK-3400 Hillerød, Denmark. Although scientists typically insist that their research is very exciting and adventurous when they talk to laymen and prospective students, the allure of

Sector launched a cooperation network involving some small coastal cities in Europe and North Africa, renowned for their historical interest and their environment. This project,“Small Coastal Historical Cities: Sustainable Urban Development and Freshwater Resources” (Essaouira, Mahdia, Saida,Omisalj,Kodar) deals with the problems specific to small coastal cities, such as: The decline in traditional economic activities due to the exhaustion of natural resources and the pressures of globalization

l'approche écosystème. Parmi ces écorégions, notons les Ecorégions d'Eau Douce identifiées pour toutes les régions dont la liste et les descriptions sont disponibles grâce au moteur de recherche du site des Ecorégions d’Eau Douce du Monde (Freshwater Ecoregions of the World, FEOW: http://www.feow.org/index.php). La figure 5.9 montre les écorégions d'eau douce en Afrique. Figure 5.8. Carte montrant l’organisation en réseaux écologiques des routes de migration en Europe (Bennett, 1991)

FAO, 2003. AQUASTAT 2003. ftp://ftp.fao.org/agl/aglw/ aquastat/aquastat2003.xls. FAOSTAT, 2006. FAO Statistical Databases. http://faostat.fao. org/default.jsp. Hoekstra, A.Y., Chapagain, A.K., 2008. Globalization of Water: Sharing the Planet’s Freshwater Resources. Blackwell Publishing, Oxford, UK. ITC, 2006. PC-TAS version 2000-2004 in HS or SITC, CDROM. International Trade Centre, Geneva. EMPREINTE ECOLOGIQUE BP, 2007. Statistical Review of World Energy June 2007. http://www.bp.com. Bull, G.,

d’eau cloudiness n. (météo.), temps m. couvert clouding n. (méd.), opacification f. (introduction d’une substance opaque aux rayons X pour l’examen d’un organe) cloudy adj., nuageux (météo.), turbide (pour un liquide) clover n. (bot.), trèfle m. clown fish n. (ich.), poisson-clown m., amphiprion m. clump n., agrégat m. (de grande taille) (phys.), touffe f. (bio.) cluster n., amas m. (astro., phys.), agrégat (astro., phys.), constellation f. (astro.), groupe m. (astro. , phys.), ~ variables (astro