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Basu, D. (1998). Female reproductive cycle in hardella thurjii gray from northern india. Hamadryad, 22(2), 95–106. 
Added by: Admin (06 Jan 2014 18:22:37 UTC)
Resource type: Journal Article
BibTeX citation key: anon1998
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Categories: General
Keywords: Fortpflanzung - reproduction, Geoemydidae, Habitat - habitat, Hardella thurjii, Schildkröten - turtles + tortoises, Südasien - Southern Asia
Creators: Basu
Collection: Hamadryad
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Abstract     
The reproductive cycle in the female Hardella thurjii from the Gomti River at Lucknow, Uttar Pradesh State, northern India, was studied. FemaIes mature at carapace length 320-350 mm. Ovaries were quiescent from winter to early summer (November-April). Follicular development took pi ace in a regime of rising environmental temperatures from summer to early monsoons (July-September). Oviposition began in late September and continued through January, aperiod wh ich extends from about the end of the monsoons through winter in northern India. Clutch sizes ranged from eight to 13 in dissected females. Annual reproductive potential was strongly correlated to female size and ranged from 30 to 100 eggs per season which was achieved through multiple clutching. Eggs ranged from 40-56 mm x 28-36 mm in dimensions and 19-41 gm weight Incubation periods extended to 273 days and embryos showed diapause. Carapace length of hatchlings ranged from 41-46 mm and weights 12-17 gm. Patterns of seasonal chronology of the reproductive cycles of female aquatic chelonians in northern India via-a-vis environmental temperatures are described. In one group of north Indian turtles, follicular activity takes pi ace in a regime of increasing environmental temperatures while in temperate regions, most turtles show foIIicular activity when environmental temperatures are decreasing.
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