Four Transgenerational Demographic Performance of Moina macrocopa Exposed to Chronic Levels of Cadmium
Por:
Luis Gama-Flores, Jose, Elena Huidobro-Salas, Maria, Sarma, S. S. S., Nandini, S.
Publicada:
18 ago 2017
Resumen:
In this study, we quantified intergenerational, demographic variability
of Moina macrocopa subjected to cadmium stress. Exposure of M macrocopa
to cadmium (0.2, 0.3, and 0.4 mg/Las CdCl2) through 4 consecutive
generations revealed changes in demographic responses not only in
survivorship variables but also in reproductive parameters. Long-term
demographic responses varied differently, depending on the demographic
trait and the concentration of heavy metal in the medium. With the
exception of generation time, all life history traits were significantly
and adversely influenced due to increase in Cd concentrations. The
average life span of M macrocopa varied up to 40% depending on Cd level
and the generation of exposure. The highest gross reproductive rates
were recorded in controls, while the lowest (similar to 30% less) were
recorded at the highest Cd level. Survival-weighted net reproductive
rates were reduced by nearly 50% due to Cd toxicity. The rate of
population increase per day of M macrocopa was also significantly
affected (similar to 25%) by Cd as compared to controls. This
cladoceran showed a dose-response to Cd toxicity with a significance in
both magnitude and frequency of offspring production.
Filiaciones:
Luis Gama-Flores, Jose:
Univ Nacl Autonoma Mexico, Carrera Biol, Campus Iztacala,Av Los Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
Elena Huidobro-Salas, Maria:
Univ Nacl Autonoma Mexico, Carrera Biol, Campus Iztacala,Av Los Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Tlalnepantla, State Of Mexico, Mexico
Nandini, S.:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Tlalnepantla, State Of Mexico, Mexico
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