The Herpetological Journal
The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.
ISSN 0268-0130
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pdf 02. Size-fecundity relationships and reproductive investment in females of Physalaemus riograndensis Milstead, 1960 (Anura, Leiuperidae) in Uruguay
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pp. 145-150
Authors: Pereira, Gisela & Maneyro, Raúl
Abstract: We describe the reproductive biology of female Physalaemus riograndensis from Uruguay. Mature ovaries with postvitellogenic oocytes were extracted from females to obtain an index of reproductive investment (RI). Monthly variation in snout-vent-length (SVL, n =328) suggests a seasonal variation in reproductive activity. Gravid females were found between October and April. RI values were generally lower than RI in other species in the genus. There was a positive correlation between SVL and fecundity for both linear and exponential models. Relative size of fat bodies was highest during the period of highest reproductive activity, suggesting that they retain energy for vitellogenic activity. The reproductive dynamics of P. riograndensis resembles one of prolonged breeding anurans.
Keywords: FAT BODY, PHYSALAEMUS RIOGRANDENSIS, ANURA, BODY SIZE, FECUNDITY, REPRODUCTIVE INVESTMENT
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