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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Size-fecundity relationships and reproductive investment in female frogs in the Pantanal, south-western Brazil

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Prado, Cynthia P. A. [1] ; Haddad, Celio F. B. [2]
Total Authors: 2
[1] Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Instituto de Biociências - Brasil
[2] Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Instituto de Biociências - Brasil
Total Affiliations: 2
Document type: Journal article
Source: HERPETOLOGICAL JOURNAL; v. 15, n. 3, p. 181-189, July 2005.
Field of knowledge: Biological Sciences - Zoology

The ovarian complement of anurans exhibiting different reproductive modes is highly diverse, and intraspecific variation in reproductive output of anurans is generally related to variation in female properties and/or environmental conditions. The size-fecundity relationships, reproductive investment, and correlation between ovary mass and fat body mass were investigated for females of an anuran assemblage in the Pantanal, Brazil. Female body size was positively correlated with clutch size among seven of the eight species analyzed. However, these results seem to be influenced by seasonal variation in fecundity. Interspecific size-fecundity relationships revealed that female SVL was positively correlated with clutch size and egg size regardless of reproductive mode. Among 11 species analyzed, the reproductive investment (RI: ovary mass relative to body mass) varied from 5.5 to 18%, and there were no differences among reproductive modes and activity patterns (explosive / prolonged). RI correlated negatively with female size. Among three Leptodactylus species examined, negative correlation between ovary mass and fat body mass was verified for two species. Variations in the reproductive strategies are closely related to the reproductive activity patterns and reproductive modes exhibited by individual species, but are also influenced by environmental conditions. However, regardless of reproductive mode or activity pattern, each species seems to exhibit a reproductive strategy that allows them to respond differently to the same environmental restrictions. (AU)

FAPESP's process: 01/13341-3 - Diversity of Anuran Amphibians from São Paulo State
Grantee:Célio Fernando Baptista Haddad
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 04/00709-0 - Genetic and phenotypic variability of two species of open area netropical anurans
Grantee:Cynthia Peralta de Almeida Prado
Support type: Scholarships in Brazil - Post-Doctorate