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Effects of temperature and nutrients on growth and toxicity of Alexandrium affine from southeastern Gulf of California.
Alonso-Rodríguez, Rosalba; Pichardo-Velarde, Jorge Gerardo.
Afiliação
  • Alonso-Rodríguez R; Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena s/n, Mazatlán, Sinaloa 82040, Mexico. Electronic address: rosalba@ola.icmyl.unam.mx.
  • Pichardo-Velarde JG; Facultad de Ciencias del Mar (FACIMAR), Universidad Autónoma de Sinaloa (UAS), Paseo Claussen S/N, Centro, Mazatlán, Sinaloa 82000, Mexico.
Mar Pollut Bull ; 203: 116464, 2024 Jun.
Article em En | MEDLINE | ID: mdl-38759464
ABSTRACT
An Alexandrium affine strain (AAJQ-1) from San José Island, Gulf of California was characterized for growth and toxicology. Fivefold of f/2 + Se cultures were incubated for 34 days in a temperature gradient (21-29 °C). Aliquots were collected every third day for cell counting, toxin determination, and nutrient analyses. In this study ELISA method was used to evaluate the PSP toxin production due to the lower detection limit than the HPLC method. The highest cell density (6724 cells mL-1) and growth rate (0.22 day-1) were obtained at 27 °C and they were related to temperature in all treatments. Cell density showed negative correlation with nitrate at temperatures ≥23 °C, and with orthophosphate 27 °C, furthermore, these correlations promote the toxin production (0.05-0.45 fmol STX cell-1); beyond that nitrite at high temperature seems to promote toxin production, which has not been sufficiently documented.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura / Dinoflagellida / Toxinas Marinhas País/Região como assunto: America do norte Idioma: En Revista: Mar Pollut Bull Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura / Dinoflagellida / Toxinas Marinhas País/Região como assunto: America do norte Idioma: En Revista: Mar Pollut Bull Ano de publicação: 2024 Tipo de documento: Article