Literaturdatenbank
Literaturdatenbank |
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Whitaker, N. (2012). Reproduction and morphohlogy of the travancore tortoise (indotestudo travancorica) boulenger, 1907. In C. Wahl (Ed.), Morphometrics (pp. 3).InTech.
Added by: Sarina Wunderlich (30 Jun 2012 22:02:05 UTC) |
| Resource type: Book Article BibTeX citation key: Whitaker2012 View all bibliographic details  |
Categories: General Keywords: Fortpflanzung = reproduction, Habitat = habitat, Indotestudo forstenii, Indotestudo travancorica, Schildkröten = turtles + tortoises, Südasien = Southern Asia, Zeitigung = incubation Creators: Wahl, Whitaker Publisher: InTech Collection: Morphometrics |
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| URLs http://www.intecho ... ooks/morphometrics |
| Abstract |
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In this chapter I discussed the reproductive biology, morphometrics, and temperature selection in a small group of Indotestudo travancorica. Incubation period varied between 128 – 159 days (X = 141.5 days), in a group of 34 eggs from 11 clutches; out of these eggs candled in the 1999 incubation sessions, 18 had sub embryonic fluid visible, whilst 16 did not. From this series, diel variation did not differ between four measurements of temperature in a day. Initial determination of viability was not accurate, and definitive determination of viability did not occur until one month into incubation when vascularisation was visible. Incubation periods were found to be similar in the sister species Indotestudo forstenii, but maximum clutch size was two, compared to six in I.travancorica. Clutch size was not related to female carapace length. Following egg laying , total clutch weight represented 4 % of the female’s weight. Initial egg weight as compared to hatchling weight was 72 %. With regards to sexual size dimorphism, no differences were noted between males and females. I. travancorica females reach maturity at between 192 – 290 millimeters, and a kilogram in weight. Future studies may find females reaching maturity at smaller sizes. Temperature selection presented here in captivity as opposed to natural populations was a preliminary attempt at best; higher resolution loggers than the ones used here (±0.5º C) in combination with behavioral observations would result in a better data set.
Added by: Sarina Wunderlich |