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Rev. biol. mar. oceanogr. 48(2): 393-399

Research Note

Proliferation of Pseudo-nitzschia brasiliana and P. cf. pseudodelicatissima (Bacillariophyceae) in the Estero Santa Cruz, northern Gulf of California, Mexico

Ismael Gárate-Lizárraga1, Carlos Antonio Poot-Delgado2,3, Erick Ramsés Ramírez-Castillo4 & Manuel Humberto Páez-Hernández5

1Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Plancton y Ecología Marina, Avenida Instituto Politécnico Nacional s/n, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur 23096, México
2Centro de Estudios del Mar, Departamento de Recursos Acuáticos, Km. 1 Carretera Campeche-Hampolol s/n, Col. Palmas, Campeche, Campeche 24027, México
3Laboratorio de Botánica Marina y Planctología, Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana, Calle Hidalgo Nº 617, Col. Rio Jamapa, Boca del Rio. Veracruz, C.P. 94290, México
4Comité de Sanidad Acuícola del Estado de Sonora, Ébanos Nº 58, Col. Fuentes del Mezquital, Hermosillo, Sonora, México
5Dirección General de Protección contra Riesgos Sanitarios del Estado de Sonora, Paseo del Canal y Comonfort, Edificio Sonora, Sonora, México

E-mail: igarate@ipn.mx

 

A moderate bloom of Pseudo-nitzschia species occurred during collection of phytoplankton in Estero Santa Cruz, the State of Sonora, Mexico, in August 2012. The abundance of Pseudo-nitzschia in 2 samples was 84x103 and 160x106 cells L–1. Results show the presence of 2 species, P. brasiliana and P. cf. pseudodelicatissima, which were responsible for a microalgae bloom. This is the first proliferation of P. brasiliana in the Gulf of California. P. cf. pseudodelicatissima was present in higher densities. A short morphological description is provided, including data from scanning electronic microscopy.

Key words:  Diatom blooms, Pseudo-nitzschia brasiliana, P. cf. pseudodelicatissima, oyster farming, Gulf of California, Mexico

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