title: A circannual rhythm in cysts formation and growth rates in the dinoflagellate Scripsiella trochoidea Stein.
abstract: The percentages of formed cysts and growth rates were monthly estimated and analyzed rhythmometrically by cosinor for 5 clonal cultures of Scripsiella trochoidea Stein grown for 2 years under laboratory conditions, rended as constant as possible from the view point of environmental temperature (24 +/- 1 degree C), lighting (25 microEin m-2 s-1), and artificial seawater. A circannual rhythm is macroscopically apparent and microscopically (by cosinor) validated for 3 of 5 clones. The data of the other 2 clones did not allow rhythm detecting by the method used, suggesting differences in spectral structure of S. trochoidea strains both in terms of cyst formation and growth rate rhythms.
authors: Sección de Genética, Hospital Teresa-Herrera, Las Jubias, La Coruña, Spain.
authors: E
authors: E
authors: Costas
authors: M
authors: M
authors: Varela
mesh_terms: D000818:Animals; D004141:Dinoflagellida / Q000254:growth & development*; D012621:Seasons