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| Chopin, T; Floc'H, J; Bodeau, B; Penot, M. |
| Phosphorated nutrition of the red alga Chondrus crispus Stackh. is studied is two morphologically very dissimilar forms of the thallus. Phosphorus measurements, which were monthly carried out at different parts of the alga, showed first that the distribution of this element is not homogeneous along the thallus, and second that seasonal variations occur. It is suggested that the classical polymorphism of the species can be taken into account as concerns its physiology. Besides, from absorption and exsorption experiments which were performed with super(32)P as a tracer, it is shown that the high concentration factor of phosphorus in the alga as compared to the environmental seawater (up to 17.9 x 10 super(4)) can be explained as an effect of metabolic process. |
| Tipo: Text |
Palavras-chave: Chondrus crispus; Algae; Distribution; Metabolism; Seasonal variations; Food absorption; Phosphorus; Plant nutrition. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/acte-1175.pdf |
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| Kopp, Joël; Perez, René. |
| In this study, the authors determine the data (dynamics and productivity in carrageenins) which are necessary to the rational management of the C. crispus populations. In the first part, they study the growth of the individual and of the population and the parameters which condition the population evolution. In the second part, they determine the seasonal fluctuations in different carrageenins and the influence of physiological factors. In the third part, they integrate the results to attain a synoptic view of the population states. |
| Tipo: Text |
Palavras-chave: Chondrus crispus; Carrageenins; Seaweed products. |
| Ano: 1978 |
URL: http://archimer.ifremer.fr/doc/1978/publication-1961.pdf |
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