You are in the accessibility menu

Please use this identifier to cite or link to this item:
Carrying progeny on the back: reproduction in the Brazilian aquatic frog Pipa carvalhoi
  • Instituto Butantan
  • Universidade Estadual Paulista (UNESP)
  • Universidade Federal de São Paulo (UNIFESP)
  • Universidade de São Paulo (USP)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Instituto Nacional de Ciência e Tecnologia em Toxinas (INCTTOX)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Female Pipa carvalhoi incubate their eggs in the skin of the dorsum where the embryos develop until they emerge. Behavioral and morphological aspects of this reproductive mode were studied through courtship until the tadpoles emerged. Samples of the female skin were collected beginning a few hours after egg deposition and through subsequent phases of larval development and examined using standard histology, histochemistry and immunohistochemistry. The females' dorsal skin structure changes during egg implantation and development. These changes may be mediated by hormones and enzymes in a manner paralleling that of trophoblast implantation in mammal endometrium. The lack of vittelum and the extensive vascularization in the female after the 14th day of egg implantation suggest interaction through blood between the female and embryos. This hypothesis could be better accessed, if comparisons could be made with similar species such as Pipa pipa and Pipa arrabali, in which the embryos hatch only after metamorphosis. Similar observations have been made for marsupial frogs of the genus Gastrotheca in which some females maintain the embryos in a pouch in the dorsal integument. For P. carvalhoi, at least within populations of the Brazilian semi-arid environment (Caatinga), where bodies of water and rivers are temporary and depend on the short rainy season, this type of reproduction may be important for the rapid dissemination of large numbers of progeny.
Issue Date: 
South American Journal of Herpetology, v. 6, n. 3, p. 161-176, 2011.
Time Duration: 
  • Amphibia
  • Anura
  • Pipidae
  • Pipa carvalhoi
  • Skin morphology
  • Reproduction
  • Behavior
  • Nuptial dance
Access Rights: 
Acesso restrito
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.