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JPR Advance Access originally published online on August 20, 2004
Journal of Plankton Research 2004 26(12):1459-1470; doi:10.1093/plankt/fbh133
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Journal of Plankton Research Vol. 26 No. 12 © Oxford University Press 2004; all rights reserved

Effects of growth medium, temperature, salinity and seawater source on the growth of Gymnodinium catenatum (Dinophyceae) from Bahía Concepción, Gulf of California, Mexico

C. J. Band-Schmidt1,2,*, L. Morquecho1, C. H. Lechuga-Devéze1 and D. M. Anderson3

1 Centro de Investigaciones Biológicas del Noroeste (CIBNOR), APDO. Postal 128, La Paz, B.C.S. 23000, Mexico and 3 Biology Department, Woods Hole Oceanographic Institution (WHOI), Woods Hole, MA 02543, USA 2 Present Address: CICIMAR-IPN, Dep. Plancton y Ecología Marina, Ave. Instituto Politécnico Nacional S/N, La Paz, B.C.S. 23000, México

* Corresponding Author: cbands{at}ipn.mx

Received 19 April, 2004; accepted in principle 2 June, 2004; accepted for publication 2 August, 2004; published online August 20, 2004

Laboratory studies were performed to determine the effect of temperature, salinity, seawater sources and culture media on the vegetative growth of clonal cultures of Gymnodinium catenatum isolated from Bahía Concepción, Mexico. These isolates were heterothallic and isogamous. Exponential growth rates of G. catenatum in f/2 with different selenium concentrations and soil extract and GSe media were moderate. Maximum cell yields were obtained in GSe and f/2 media with selenium (10–8 and 10–7 M), while in f/2 medium with soil extract cell yields were considerably lower. The highest percentage of long chains was found in f/2 media supplied with selenium (10–8 M). The optimal temperature range for growth was 11.5–30°C, with the highest growth rates between 21 and 29°C. The range of salinity tolerated by G. catenatum changed with seawater source. With seawater from Vineyard Sound (Massachusetts, USA), G. catenatum grew at salinities from 15 to 36, with an optimal growth rate obtained at salinities between 26 and 30. With seawater from Bahía Concepción, this species tolerated salinities from 25 to 40, with optimal growth at salinities between 28 and 38. Ecophysiological measurements reported here are consistent with the environment of the bay, which has limited input of humic materials from runoff and high salinity and temperature. These data, when viewed with data from studies of globally distributed G. catenatum, demonstrate the ability of this species to live in a broad array of habitats.


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C. J. Band-Schmidt, D. I. Rojas-Posadas, L. Morquecho, and N. Y. Hernandez-Saavedra
Heterogeneity of LSU rDNA sequences and morphology of Gymnodinium catenatum dinoflagellate strains in Bahia Concepcion, Gulf of California, Mexico
J. Plankton Res., July 1, 2008; 30(7): 755 - 763.
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