Lethal effects of five metals on the freshwater rotifers Asplanchna brigthwellii and Brachionus calyciflorus

  • Gustavo Emilio Santos-Medrano Centro de Ciencias Básicas, Departamento de Química, Universidad Autónoma de Aguascalientes, Avenida Universidad 940, Ciudad Universitaria Aguascalientes, Ags., 20131. México
  • Roberto Rico-Martínez Centro de Ciencias Básicas, Departamento de Química, Universidad Autónoma de Aguascalientes, Avenida Universidad 940, Ciudad Universitaria Aguascalientes, Ags., 20131. México
Palabras clave: Acute toxicity, aquatic toxicology, LC50, metal toxicity, trophic interactions.

Resumen

Acute toxicity tests of five metals (aluminum, cadmium, iron, lead,zinc) were performed to determine LC50 values in two species of freshwater rotifers: Asplanchna brigthwellii and its prey Brachionus calyciflorus. We conducted the tests using neonates less than 24 hr-old, each test consisted of five replicates, negative control and five metal concentrations (Al, Cd, Fe, Pb, Zn). We found that the prey rotifer B. calyciflorus was more sensitive to Al, Cd, Pb and Fe than the predator rotifer A. brightwellii. For both rotifers Cd was the most toxic of the five metals. It was established that the strain of B. calyciflorus studied is sensitivewhen comparedwith otherB. calyciflorus strains and other species and genera ofthe family Brachionidae. In the other hand, LC50 values of A. brigthwellii are compared with rotifer and copepod predators.

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Publicado
03-01-2017
Cómo citar
Santos-Medrano, G. E., & Rico-Martínez, R. (2017). Lethal effects of five metals on the freshwater rotifers Asplanchna brigthwellii and Brachionus calyciflorus. HIDROBIOLÓGICA, 23(1), 82-86. Recuperado a partir de https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/624
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