Indirect effects of invasive and native predatory copepods (Mesocyclops pehpeiensis Hu and M. longisetus curvatus Dussart) on the population growth of brachionid rotifers
Por:
Valencia-Vargas M.A., Nandini S., Sarma S.S.S., Castellanos-Páez M.E.
Publicada:
1 ene 2024
Ahead of Print:
1 ago 2023
Resumen:
We quantified the effect of two cyclopoids, an invasive (Mesocyclops pehpeiensis) and a native (Mesocyclops longisetus curvatus) species on the population growth of the rotifers Brachionus havanaensis and Brachionus calyciflorus. We hypothesized that the invasive copepod would have a greater adverse effect on the test rotifers. The population growth of B. havanaensis was tested in the indirect presence of B. calyciflorus (used as prey for the predatory copepods), and the predatory copepods, M. pehpeiensis and M. longisetus curvatus. For B. calyciflorus the experimental design was as above except that we used B. havanaensis as prey. The test rotifers were separated from the competitors and predators by mesh cages placed in the experimental jars. Rotifer density and the egg ratios were quantified, followed by a daily medium change, until the population density declined. The population growth rate of B. havanaensis ranged between 0.26 and 0.30 day-1, while that of B. calyciflorus between 0.19 and 0.21 day-1. The presence of the invasive copepod had an adverse effect on the smaller (< 110 µm) B. havanaensis, but not on the larger (> 180 µm) B. calyciflorus. The results are discussed with emphasis on the differences in the indirect impact invasive and native predatory copepods. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023.
Filiaciones:
Valencia-Vargas M.A.:
Universidad Autónoma Metropolitana, Doctorado en Ciencias Biológicas y de la Salud, Unidad Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Alcaldía Coyoacán, Mexico City, C.P. 04960, Mexico
Nandini S.:
Universidad Nacional Autónoma de México, Edificio UMF, Laboratorio de Zoología Acuática, Campus Iztacala, Av. de los Barrios, No 1, Los Reyes, Edo. de México, Tlalnepantla, CP. 54090, Mexico
Sarma S.S.S.:
Universidad Nacional Autónoma de México, Edificio UMF, Laboratorio de Zoología Acuática, Campus Iztacala, Av. de los Barrios, No 1, Los Reyes, Edo. de México, Tlalnepantla, CP. 54090, Mexico
Castellanos-Páez M.E.:
Universidad Autónoma Metropolitana, Unidad Xochimilco, Laboratorio de Rotiferología y Biología Molecular de Plancton, Calzada del Hueso 1100, Col. Villa Quietud, Alcaldía Coyoacán, Mexico City, C.P. 04960, Mexico
|