Adaptive toe morphology of Euchlanis cf. mikropous Koch-Althaus, 1962 (Rotifera: Euchlanidae) exposed directly and indirectly to invertebrate predators
Por:
Nandini, S., Sarma, S. S. S.
Publicada:
1 sep 2019
Categoría:
Aquatic science
Resumen:
We have been culturing a species of Euchlanis cf. milcropous isolated
from a river in Mexico. This species frequently loses its toes, which
then reappear in successive generations. We studied the population
dynamics of this species at different food levels of Chlorella vulgaris
(0.25 x 10(6), 0.5 x 10(6) and 1.0 x 10(6) cells ml(-1)) and in the
direct and indirect presence of the invertebrate predators Stenostomum
leucops (Turbellaria) and Asplanchna brightwellii (Rotifera).
Experiments were conducted in 50 ml containers with 25 ml of moderately
hard water and the desired food level or predator treatment. We
initiated the experiments with exclusively females with and without
toes. We observed that at high densities, in the test jars containing
females with toes, toeless individuals developed. We also found that the
females produced more mictic and amictic eggs in the controls than in
the presence of the predators. The lifespan of this species was < 10
days and its population growth rate ranged from 0.10 to 0.60 d(-1),
depending on the treatment. To our knowledge this is the first
laboratory study on Euchlanis cf. mikropous.
Filiaciones:
Nandini, S.:
Univ Nacl Autonoma Mexico, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, State Of Mexico, Mexico
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