Advertisement call and female sexual cycle in Uruguayan populations of Physalaemus henselii (Anura, Leiuperidae)

Iheringia. Série Zoologia

Raúl Maneyro²  Diego Núñez²  Claudio Borteiro¹  Marcelo Tedros¹  Francisco Kolenc¹ 

[1] ,Universidad de la República Facultad de Ciencias Sección Zoología Vertebrados,Uruguay

关键词: Amphibia;    Anura;    Physalaemus;    advertisement call;    sexual cycle;    Amphibia;    Anura;    Physalaemus;    canto de anuncio;    ciclo sexual;   

DOI  :  10.1590/S0073-47212008000200007

来源: SciELO

【 摘 要 】

Physalaemus henselii (Peters, 1872) is a little known leiuperid frog that has not been studied since the 1960’s. Herein, we redescribe its advertisement call, and assess the female sexual cycle and the reproductive period on the basis of the macroscopic analysis of the ovaries and field observations. The Ovarian Size Factor (OSF) was calculated. The study was made in Departamento de Rivera, northern Uruguay. The advertisement call consists of short (177 ± 21ms), multipulsed (20 ± 3 pulses/note) notes, with a note repetition rate of 1.57 ± 0.13 notes/s. Physalaemus henselii has a female sexual cycle with unimodal distribution of gravid females, which are present from February to September. The OSF and the ratio "females with mature oocytes / females without mature oocytes" reached the highest values from April to June. The number and size of oocytes were positively correlated with female size. The smallest female (SVL =18.94mm, weight =0.78g) with mature oocytes was found in July. The observed sexual cycle with a single annual reproductive period during the cold season (autumn and early winter), is an uncommon fact for anuran species in the region.

【 授权许可】

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