Literaturdatenbank

WIKINDX Resources

Singh, D. P. (1977). Annual sexual rhythm in relation to environmental factors in a tropical pond turtle, lissemys punctata granosa. Herpetologica, 33(2), 190–194. 
Added by: Admin (25 Aug 2008 21:59:07 UTC)   Last edited by: Beate Pfau (03 Oct 2009 12:12:25 UTC)
Resource type: Journal Article
BibTeX citation key: Singh1977
View all bibliographic details
Categories: General
Keywords: Fortpflanzung = reproduction, Habitat = habitat, Lissemys, Lissemys punctata, Schildkröten = turtles + tortoises, Südasien = Southern Asia, Trionychidae
Creators: Singh
Collection: Herpetologica
Views: 3/500
Views index: 9%
Popularity index: 2.25%
Abstract     
The annual gonadal cycle in a tropical pond turtle, Lissemys punctata granosa was studied and possible dominating role of some environmental factors was analyzed. The seasonal cyclic gonadal changes were divided into six phases. The onset of gonadal activity and preparatory phase in normal habitat were recorded during March with the increasing day length. A progressive increase in gonadal activity continued through the succeeding months and the peak, with breeding activity, was encountered during July-August which coincided with the longest day length of the season. Successive regression started after breeding in September reaching a minimum during November-December, the shortest day period. An enhanced gonadal activity was registered between vernal and autumnal equinox with long days. Temperature and humidity were found to be the important complimentary factors with additive effects in making the sexual cycle a final success. Refractory and resting phases stretched from November to early February, concurrent with the short day-length period.
Added by: Admin  Last edited by: Beate Pfau
wikindx 4.2.2 ©2014 | Total resources: 14930 | Database queries: 54 | Script execution: 0.33014 secs | Style: American Psychological Association (APA) | Bibliography: WIKINDX Master Bibliography