IFIBYNE   05513
INSTITUTO DE FISIOLOGIA, BIOLOGIA MOLECULAR Y NEUROCIENCIAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Bullfrog tadpoles affects Rhinella arenarum growth development under competitive conditions
Autor/es:
JUNGBLUT, L.; RAICES, M.; POZZI, AG; PAZ DA
Lugar:
Chascomús
Reunión:
Congreso; XVI Jornadas Sociedad Argentina de Biología; 2014
Institución organizadora:
Sociedad Argentina de Biología
Resumen:
Jungblut, LD; Raices, M; Pozzi, AG; Paz DA. Bullfrog
tadpoles affect Rhinella arenarum
growth and development under competitive conditions. XVI Jornadas de la Sociedad Argentina de
Biología, Diciembre 2014, Chascomús, Buenos Aires , Argentina
(Presentación de Póster).
The
American bullfrog (Lithobates catesbeianus) has been introduced
throughout the world in the last century, including in Argentina. Adult
bullfrogs are voracious feeders that may eliminate native amphibians
directly through predation or interference competition; or indirectly
through exploitative competition, or introduction of diseases and
parasites. However, the competitive abilities of L. catesbeianus or
their effects on native fauna during the larval phase have been poorly
studied. In this work we performed a laboratory experiment to examine
the competitive effects of bullfrog tadpoles on the larvae of the native
anuran Rhinella arenarum. Results showed that tadpoles of R. arenarum
decreased the rate of growth and development after 4 weeks of
interaction with bullfrog tadpoles. Moreover, long time exposure (until
metamorphosis completed) reduced survivorship and delayed time to
metamorphosis in R. arenarum compared with animals reared with
conspecifics only, under identical experimental conditions. These
finding demonstrates that tadpoles of L. catesbeianus (as observed in
adults) have competitive advantages over other species that could
facilitate its invasion in novel environments.