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Showing 61-80 of 1,882 results

  2. Croissance et reproduction de l'omble-chevalier,Salvelinus alpinus (L.), dans le lac de Neuchâtel (Suisse)

    The arctic char ( Salvelinus alpinus ) which has disappeared from Lake Neuchâtel near 1963, has been reintroduced into this lake since 1979. In this...

    Par Jean-François Rubin, Bernard Buttiker in Swiss journal of hydrology
    Article 01 February 1987

  3. Influence du type de sol et de ces composantes physicochimiques sur les relations entre une variété de blé (Triticum aestivum L. var. Rescler) et deux souches, agressive et hypoagressive deGaeumannomyces graminis (Sacc.) von Arx et Olivier var.tritici Walker

    Fifty-eight samples of soil were collected from wheat fields in central and west France. Bioassays were carried out with these soils, infested by a...

    Philippe Lucas, Myriam Nignon in Plant and Soil
    Article 01 February 1987

  4. Le régime thermique des eaux de l'Ardèche dans son cours inférieur

    A study of the thermal regime of the Lower Ardeche River was carried out from July 1982 to December 1984 using a chemical method (sucrose inversion)...

    Par S. Dolédec in Swiss journal of hydrology
    Article 01 February 1987

  5. Evolution estivale de la turbidité dans le lac de Neuchâtel

    Some turbiditic measures carried out by a limnological diffusiometer along with the physico-chemical determinations of the Lake of Neuchâtel have...

    Par André Bapst, Bernard Kübler in Swiss journal of hydrology
    Article 01 February 1987

  6. La Morte du Sauget, un ancien méandre du Rhône: bilan hydrologique et biogéochimique

    The ‘Morte du Sauget’, a typical oxbow-lake in process of eutrophication and encroachment, is located in the alluvial plain of the French Upper Rhône...

    Par G. Carrel, J. Juget in Swiss journal of hydrology
    Article 01 February 1987

  7. Equivalence entre quelques paramètres estimatifs de l'abondance du zooplancton total

    Biomass determination on total zooplanktion catches, such as dry weight, wet weight or ash free dry weight, provide essential informations which...

    Par Gérard Balvay in Swiss Journal of Hydrology
    Article 01 February 1987

  8. Activite biologique des sols, modalités et lithodépendance

    In the first part of this paper, the qualitative and quantitative role of brown pigments in leaf litter is emphasized. In general, these products...

    F. Toutain in Biology and Fertility of Soils
    Article 01 February 1987

  9. Impact d'une pollution urbaine sur la partie zooplanctonique d'un systeme neitique (Marseille - Cortiou)

    Sewage of Marseilles' main outfall permanently pollutes a large coastal area centered around Cortiou, south of the city. In order to study the impact...

    Robert Arfi, Gilbert Patriti in Hydrobiologia
    Article 01 January 1987

  10. Le caoutchouc naturel: Biologie, culture et production

    Richard Evans Schultes in Economic Botany
    Article 01 January 1987

  11. Samenvatting

    In dit boek worden de resultaten van een vegetatiekundige studie op de Kafue Flats in het zuidwesten van Zambia besproken. De Flats beslaan een...
    G. A. Ellenbroek in Ecology and productivity of an African wetland system
    Chapter 1987

  12. Modifications des écosystèmes des vasières cotières du sud-Bretagne

    The northern part of the Bay of Biscaye consists of muddy areas which were the subject of many surveys conducted from the early sixties revealing...

    M. Glémarec, H. Le Bris, C. Le Guellec in Hydrobiologia
    Article 01 November 1986

  13. Suivi pluriannuel du peuplement à Abra alba dans la partie méridionale de la Mer du Nord (région de Dunkerque-France)

    The Abra alba community is considered as a faunistical unity well established on coastal areas of North Sea. This community shows, since several...

    J. M. Dewarumez, C. Quisthoudt, A. Richard in Hydrobiologia
    Article 01 November 1986

  14. Variations à long-terme (1977–1985) du peuplement des sables fins de la Pierre Noire (baie de Morlaix, Manche occidentale): analyse statistique de l'évolution structurale

    Long term monitoring for eight years of the fine sand community from the bay of Morlaix has allowed the determination of the principal stages of its...

    Jean-Claude Dauvin, Fréderic Ibanez in Hydrobiologia
    Article 01 November 1986

  16. Fluctuations naturelles et évolution artificielle des biocénoses macrozoobenthiques intertidales de trois estuaires des côtes françaises de la Manche

    The study of the intertidal benthic population dynamics in three estuaries of the English Channel (Baie des Veys, Seine estuary, Baie de...

    M. Desprez, J-P. Ducrotoy, B. Sylvand in Hydrobiologia
    Article 01 November 1986

  17. Compétitivité pour l'infection entre souches deRhizobium meliloti: Role de la mobilité

    Non mobile (mob − ) and hypermobile (mob + ) mutants were isolated from R. meliloti strain Ve 26. The mobility of R. meliloti was found to play an...

    N. E. El-Haloui, D. Ochin, R. Tailliez in Plant and Soil
    Article 01 October 1986

  18. Influence de pH acides sur la viabilité d'isolats deFrankia

    Twenty Frankia strains isolated from seven actinorhizal species were cultivated on media at various pH 5; 4.8; 4.6 and 4.2. Each strain was cultivated...

    M. Faure-Raynaud, M. A. Bonnefoy-Poirier, A. Moiroud in Plant and Soil
    Article 01 October 1986

  20. Reproduction de l'Omble de fontaine, Salvelinus fontinalis (Mitchill), dans des lacs de différents pH

    A comparative study was carried out on two groups of lakes of different levels of acidity to determine whether acidity affects brook trout...

    Mario St-Pierre, Guy Moreau in Hydrobiologia
    Article 01 October 1986
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