Multigenerational effects of triclosan on the demography of Plationus patulus and Brachionus havanaensis (ROTIFERA)
Por:
Karen Gonzalez-Perez, Brenda, Sarma, S. S. S., Castellanos-Páez M.E., Nandini S.
Publicada:
1 ene 2018
Resumen:
Triclosan is a personal care product widely used in North America,
Europe and Asia as antimicrobial ingredient in many consumer chemical
products. In Mexico concentrations of triclosan have been reported in
aquatic systems. However, there is no law regulating the presence of
chemicals such as triclosan, in aquatic systems. The scarce data about
this chemical has increased concern among ecotoxicologists regarding
possible effects on aquatic organisms. Moreover, multigenerational
studies are rarely studied and the results vary depending on the
contaminant. Rotifers, are a dominant group of zooplankton, and have
been used in aquatic risk assessments of personal care products due to
their sensitivity and high reproductive rates. Plationus patulus and
Brachionus havanaensis are common rotifers distributed in aquatic
ecosystems of Mexico and have been used in ecotoxicological bioassays.
In this study, the median lethal concentration (LC50, 24 h) of P.
patulus and B. havanaensis exposed to triclosan was determined. Based on
the LC50, we tested three sublethal concentrations of triclosan to
quantify the demographic responses of both rotifers for two successive
generations (F0, and F1). The 24 h LC50 of triclosan for P. patulus and
B. havanaensis were 300 and 500 mu g L-1 respectively. Despite the
concentration, triclosan had an adverse effect on both Plationus patulus
and Brachionus havanaensis in both generations exposed. Experiments show
that P. patulus was more sensitive than B. havanaensis when exposed to
triclosan. When exposed to triclosan the parental generation (F0) of P.
patulus was far more affected than F1.
Filiaciones:
Karen Gonzalez-Perez, Brenda:
Univ Autonoma Metropolitana, Unidad Xochimilco, Programa Doctorado Ciencias Biol & Salud, Caizada del Hueso 1100, Mexico City 04960, DF, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
Castellanos-Páez M.E.:
Univ Autonoma Metropolitana, Unidad Xochimilco, Programa Doctorado Ciencias Biol & Salud, Caizada del Hueso 1100, Mexico City 04960, DF, Mexico
Programa de Doctorado en Ciencias Biológicas y de la Salud. Universidad Autónoma Metropolitana, Unidad Xochimilco, Calzada del Hueso, No. 1100, Villa Quietud, Mexico City, Código 04960, Mexico
Nandini S.:
Univ Nacl Autonoma Mexico, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios #1, Col. Los Reyes, Iztacala, Tlalnepantla, State of Mexico 54090, Mexico
|