SciELO - Scientific Electronic Library Online

vol.13 issue1A glimpse at Ethology in Latin AmericaBehavioural and ecological aspects of black tufted-ear marmosets, Callithrix penicillata (Geoffroy, 1812) (Primates: Callitrichidae) in a semi-urban environment author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Revista de Etologia

Print version ISSN 1517-2805


BONFIM, Vanessa Maria Gomes; NAPOLI, Marcelo Felgueiras; CRUZ, André Luis da  and  KLEIN, Wilfried. Effects of variations of osmolarity on behavior in Leptodactylus macrosternum Miranda-Ribeiro, 1926 (Leptodactylidae, Anura, Amphibia). Rev. etol. [online]. 2014, vol.13, n.1, pp.28-36. ISSN 1517-2805.

Amphibians experiencing evapotranspirative water loss may suffer dehydration. Another difficulty is their limited tolerance to brackish water. This study aimed to investigate the effect of water salinity on behavior (activity and water conservation posture) in Leptodactylus macrosternum, in normally hydrated animals with urine in their bladder, in normally hydrated animals without urine in their bladder and in dehydrated ones with urine removed from their bladder. Experiments were filmed, behaviors were registered, and a Behavioral Dehydration Protection Index (BDPI) was calculated, using a weighted average of the postures. A GLM and Kruskall Wallis test was performed with Dunn's multiple comparisons test to evaluate the effects of osmotic gradient stress on BDPI. It was found that emptied bladder and aerial dehydration did not influence BDPI (p = 0.832 and p = 0.142, respectively), contrary to what is seen in the literature. The different osmotic media had a significant effect on BDPI (p = 0.0003).

Keywords : Osmotic stress; Leptodacytulus macrosternum; conservation posture.

        · abstract in Portuguese     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License