Demography of Hexarthra jenkinae (de Beauchamp) (Rotifera) from ephemeral and permanent habitats of the shallow waterbody Lake Texcoco (Mexico)
Por:
Nandini, S., Carmona-Ruiz J.A., Sarma S.S.S.
Publicada:
1 oct 2022
Ahead of Print:
1 dic 2021
Categoría:
Aquatic science
Resumen:
Life history strategies of rotifers vary in relation to their habitats.
We compared the demography of Hexarthra jenkinae (de Beauchamp, 1932)
from ephemeral pools and the large, permanent Nabor Carrillo Lake, both
parts of the saline Lake Texcoco in Mexico. Population growth tests were
conducted at salinities of 10, 12.5 and 15 g l(-1) (1:1 ratio of NaCl
and NaHCO3), at 22 +/- 1 degrees C with two algal food concentrations
(0.25 x 10(6) and 1.0 x 10(6) cells ml(-1) of Nannochloropsis oculata).
The population growth experiments were initiated with ten individuals
per jar, whereas for the cohort life table study we used ten neonates.
Observations were taken once (population growth) or twice (life table) a
day; experiments continued until the populations declined or the last
individual of each cohort in the life table study died. Survivorship and
growth rates increased with increasing food availability. From the
population growth studies, we found that the clone established from the
ephemeral pools had higher growth rates (0.23-0.55 day(-1)) than those
from the permanent lake (0.12-0.34 day(-1)). Growth rates were lower in
the lifetable experiments than in the population growth studies. Our
results are discussed in relation to habitat and life history strategies
exhibited by rotifers in shallow saline waterbodies.
Filiaciones:
Nandini, S.:
Laboratorio de Ecología Acuática, División de Investigación y Posgrado, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios # 1, Los Reyes Iztacala, Estado de México, Tlalnepantla, 54090, Mexico
Carmona-Ruiz J.A.:
Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito de Posgrados, Mexico City, 04510, Mexico
Sarma S.S.S.:
Laboratorio de Ecología Acuática, División de Investigación y Posgrado, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios # 1, Los Reyes Iztacala, Estado de México, Tlalnepantla, 54090, Mexico
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