IJEE-1129_Supplementary material.pdf (203.42 kB)
Download fileAssessment of adaptive strategies on life history of the rotifer Euchlanis dilatata (ROTIFERA) at different temperature and food regime
journal contribution
posted on 2022-03-03, 08:16 authored by Gustavo Emilio Santos-Medrano, Roberto Rico-Martínez, Daniel Robles-VargasThe
combined effects of two temperatures (20˚
and 25˚C) and food densities (1×104 and 1×106
cells/mL) of three microalgae, Chlorella vulgaris, Nannochloropsis
oculata and Scenedesmus obliquus on the life history of Euchlanis
dilatata were evaluated. Our work integrated: effects of temperature on the
activation energy (Ea), and evaluation of the rate of decrease or
increase through the temperature coefficient (Q10) in the different
biological processes of the life table of E. dilatata, including,
morphometric values and hatching egg percentages. The best conditions to reach
the highest instantaneous growth rate (r) in E. dilatata were 25˚C
fed with N. oculata (1×106
cells/mL) while the lowest r value was registered with C. vulgaris
with both temperatures. In the mean generation time and age at first
reproduction, the Ea was higher at 20˚C,
where Q10 values < 1 indicate that these rates decrease with
increasing the temperature. We found an exception to the temperature-size rule
when rotifer was fed C. vulgaris at 25˚C. Moreover, the rotifer fed with S. obliquus reached the maximum size. Our hypothesis is that when temperature
increase 5°C, the rotifer may shorten its embryonic development, thereby
increasing r and net reproduction rate.