title: [Harmful algal blooms produced by Pyrodinium bahamense in Oaxaca, Mexico (2009-2010)].
abstract: OBJECTIVE
  Pyrodinium bahamense monitoring in water and their toxins in rock oyster Striostrea prismatica in Santiago Astata and Puerto Escondido Oaxaca was performed from September 2009 to July 2010.
  
  
  METHODS
  Pyrodinium bahamense abundance in water, and concentration and toxic profile of paralytic shellfish toxins were analyzed monthly in soft tissue of mollusk in composite samples in high performance liquid chromatography.
  
  
  RESULTS
  High abundance of Pyrodinium bahamense was found in Santiago Astata on December, February, April and June; and in Puerto Escondido on April and June. The concentrations of the paralyzing toxin that exceeded the regulatory limit for human consumption of mollusks (800 µg STX eq. kg⁻¹) were presented in Santiago Astata on November, December, January, February and June; and in Puerto Escondido on December and June.
  
  
  CONCLUSIONS
  For several months there was risk to public health due to the presence of paralytic shellfish toxins above the regulatory limit in oysters from the study area.
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Mazatlán, Sinaloa, México.
authors.forename: Rosalba
authors.initials: R
authors.lastname: Alonso-Rodríguez
authors.affiliation: Universidad del Istmo, Ixtepec, Oaxaca, México.
authors.forename: Elsa
authors.initials: E
authors.lastname: Mendoza-Amézquita
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Mazatlán, Sinaloa, México.
authors.forename: Sandra Abigail
authors.initials: SA
authors.lastname: Velásquez-López
authors.affiliation: Universidad del Istmo, Ixtepec, Oaxaca, México.
authors.forename: Jens Andreas
authors.initials: JA
authors.lastname: Seim
authors.affiliation: Universidad del Istmo, Ixtepec, Oaxaca, México.
authors.forename: Víctor Manuel
authors.initials: VM
authors.lastname: Martínez-Rodríguez
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D004141:Dinoflagellida / Q000254:growth & development* / Q000378:metabolism; D005506:Food Contamination / Q000032:analysis*; D057097:Harmful Algal Bloom; D008387:Marine Toxins / Q000032:analysis*; D008452:Maximum Allowable Concentration; D010125:Ostreidae / Q000737:chemistry*; D010140:Pacific Ocean; D017747:Seafood / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*
chemical_list: D008387:Marine Toxins