Data/hora: 10/06/2024 16:23:26

Provedor de dados: | 5
País: | France
Título: | Evolution divergente de cultures phytoplanctoniques marines en relation avec la qualité des enrichissements
Autores: | Divanach, P.; Sube, J.
Data: | 1979
Ano: | 1979
Palavras-chave: | Enrichissements; Recyclage; Écume; Phytoplancton; Déchets; Aquaculture; Enrichments; Recycling; Foam; Phytoplankton; Wastes; Aquaculture.
Resumo: | Four marine phytoplanctonic cultures from natural inoculum of Nannodito sp. have been submitted to different fertilizers in identical light and tem­perature conditions. The composition of enrichments has been studied to introduce Nitrogen as comparative factor. One tank without nutrients and three enriched cultures, the first only with sodium nitrate, the second with "Conway medium" and the last in which nutri­ents were provided by convenient dilution of "foam", have been followed for phy­sical, chemical, biological parameters during three months. Temperature, pH, dis­solved oxygen, optical density, particulate matters, Organic Carbon, Nitrogen, Phos phorus, Calcium, Magnesium, Sodium, Potassium, metal traces and biological parame­ters were analysed periodically. The first results of the experiments enable to show : - the unsteadiness of non enriched and mineral enriched cultures in which algal biomass falls quickly according to a competition between algae dil­ates, Rotifers and Copepoas ; - the steadiness of the medium enriched with foam during all the ex­periments due to the permanent richness of this selective medium and the delay of contamination by a relative toxicity of this type of culture versus tiny zooplankton as grazing agent. Finally It Is possible to anticipate the applicability of poor but selective media for mass cultures of marine planktonic algae.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00305/41662/42780.pdf

http://archimer.ifremer.fr/doc/00305/41662/

Editor: | Publications du Centre National pour l'Exploitation des Océans (CNEXO). Série : Actes de colloques, n° 7, 1979, pp. 207-220
Formato: | application/pdf

Fonte:

Centre National pour l’Exploitation des Océan, 1979

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