INVESTIGADORES
GABELLONE Nestor Adrian
artículos
Título:
Influence of temperature and conductivity on the life-history characteristics of a pampean strain of Brachionus plicatilis
Autor/es:
FERRANDO N; CLAPS, MARÍA CRISTINA; BENITEZ, HERNÁN; GABELLONE, N. A.
Revista:
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.
Editorial:
ACAD BRASILEIRA DE CIENCIAS
Referencias:
Lugar: Rio de Janeiro; Año: 2018 vol. 90 p. 1431 - 1444
ISSN:
0001-3765
Resumen:
In the present work we provide the first approach about the life-history ofBrachionus plicatilis in South America. We tested with laboratory experimentsthe response of the Pampean strain of B. plicatilis for two of its main stressors (conductivity and temperature). We evaluated the effects of eight conductivity values from 1 to 17 mS.cm-1 and two temperatures (15 and 25 °C) to compare its abundance with those obtained in the pampean lotic and lentic environments where this rotifer is frequent or dominant. The results demonstrated that the increase in population-growth rate and the peak of abundance occurred at the highest temperature and at medium conductivity. Minimum values were obtained at the lowest temperature and conductivities analyzed, but the final density attained was nevertheless similar to those recorded in the pampean environments at the optimum conductivity and during the spring and summer seasons. Males, mictic females, and resting eggs were observed at the minimum and maximum conductivities, revealing the strategy of this species for maintaining dominance in environments with fluctuating salinity. Theexperiments also indicated the possible behavior of this relevant member of thezooplankton community within a scenario of increasing temperature and salinityrelated to the climate changes occurring in the pampean region.