Population growth, demography and competition studies on Dipleuchlanis propatula (Gosse, 1886) (Rotifera: Euchlanidae)
Por:
Nandini, S., Sarma, S. S. S.
Publicada:
1 dic 2021
Ahead of Print:
1 jul 2021
Resumen:
We tested the effect of different food (Chlorella vulgaris)
concentrations on the population growth and demographic variables of
Dipleuchlanis propatula. In addition, we also tested the effect of
competition from two other zooplankton species (a rotifer Plationus
patulus and a ciliate Paramecium sp.). The parthenogenetic eggs of D.
propatula carry a gelatinous matrix with a thickness of about 20 mu m.
Population growth of D. propatula increased with increase in the algal
density. Depending on the food availability, the peak abundances of D.
propatula varied from 9 to 50 ind. ml(-1). The rate of population
increase, r, varied from 0.18 to 0.23 per day. Food density had a
significant effect (p < 0.05, Tukey test) on this variable too. In spite
of higher peak densities observed at high food levels, the r values were
not very different; this was due to the long lag phase before the
population increased. Dipleuchlanis propatula growth was lower due to
competition from ciliates. Food density had no significant effect on the
average life span, which varied from 5 to 7 days. However, both gross
and net reproductive rates increased with increase in algal food. These
results show that D. propatula had growth patterns similar to other
members of the family Euchlanidae.
Filiaciones:
Nandini, S.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
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