Data/hora: 01/06/2024 07:50:15

Provedor de dados: | 5
País: | France
Título: | Microalgal production in oyster ponds: Nutrition and dissolved organic nitrogen
Autores: | Maestrini, S; Robert, J.
Data: | 1984-11
Ano: | 1984
Palavras-chave: | Bacillariophyceae; Bivalvia; Biomass; Pond culture; Algal settlements; Oyster culture; Nutritive value; Dissolved organic nitrogen.
Resumo: | Microalgal population of oyster ponds is dominated by several tychobenthic diatoms which provide a very good food to grow oysters. The mechanisms which allow them to dominate have been put under research. H.P.L.C. analysis demonstrated 17 amino acids amounted 10-17% of total DON, i.e. 0.6-11.5 mu g-at/l nitrogen. Serin and glycin were the most abundant. None of the substances was related to the presence of oyster. Glutamic acid, alanin and ornithin concentrations showed the greatest variations; they are suspected to play the major role as nutrient source. Screening of nutritional capabilities of ten local isolates of micro-algae to use 42 organic substances as sole source of nitrogen, demonstrated urea, glutamic acid and hypoxanthin are assimilated by all the ten algae, yet urea alone always supports a growth as good as the one showed with NO sub(3). Other good sources are guanin, ornithin and glycin. Most of the substances, however, are taken up and assimilated by a few strains and subsequent growth is light.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1984/acte-1531.pdf
Editor: | Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1984
Relação: | http://archimer.ifremer.fr/doc/00000/1531/
Formato: | application/pdf