Spatial and temporal distribution of Pseudis minuta (Anura, Hylidae, Hylinae) and environmental variables related to its reproductive activity in Reserva Biológica do Lami, southern Brazil

Iheringia. Série Zoologia

Caroline Zank²  Marcos Di-bernardo¹  Raúl Maneyro¹  Patrick Colombo¹  Luciana A. Fusinatto¹  Luis Fernando M. Da Fonte² 

[1] ,Universidade Federal do Rio Grande do Sul Instituto de Biociências Laboratório de HerpetologiaPorto Alegre RS ,Brazil

关键词: Spatial-temporal distribution;    reproductive activity;    environmental variables;    Pseudis minuta;    Distribuição espaço-temporal;    atividade reprodutiva;    variáveis ambientais;    Pseudis minuta;   

DOI  :  10.1590/S0073-47212010000200010

来源: SciELO

【 摘 要 】

We studied the reproductive biology of a population of Pseudis minuta Günther, 1858 from Reserva Biológica do Lami (30º 15' S; 51º 05' W), Porto Alegre, southern Brazil. We assessed the spatial and temporal distribution of individuals (males, females, juveniles) and explored potential relationships with environmental variables. Field activities encompassed bimonthly surveys in three semi-permanent ponds, each one during approximately two days and two nights, from August 2004 to July 2005. We recorded differences in the sites used by males, females and juveniles, with males occupying deeper and more distant places from the border. The temporal distributions of individuals, calling sites and amplectant pairs indicated that the reproductive activity of P. minuta is related to some of the studied abiotic factors. Calling males presented statistical differences in relation to non-calling males for all daily abiotic variables analyzed (air temperature, water temperature, relative humidity and rainfall), as well as to monthly temperature and rainfall. The number of active males, females and juveniles was influenced by at least one of the daily or monthly environmental variables analyzed. We conclude that the reproduction in this species is seasonal and may be partially determined by abiotic factors.

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