Literaturdatenbank
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Crow, J., Gibbons, P., & Goode, E. , Natural history, husbandry, and incubation of forsten’s tortoise (indotestudo forstenii) - abstract. Unpublished paper presented at Program and Abstracts of the Tenth Annual Symposium on the Conservation and Biology of Tortoises and Freshwater Turtles.
Added by: Admin (06 Jan 2014 18:22:43 UTC) |
| Resource type: Conference Paper BibTeX citation key: Crow2012 View all bibliographic details  |
Categories: General Keywords: Haltung - husbandry, Indotestudo forstenii, Schildkröten - turtles + tortoises, Testudinidae Creators: Crow, Gibbons, Goode Collection: Program and Abstracts of the Tenth Annual Symposium on the Conservation and Biology of Tortoises and Freshwater Turtles |
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| Abstract |
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Testudinidae The Forsten’s Tortoise (Indotestudo forstenii) is endemic to the island of Sulawesi in Indonesia. The species lives in some of the driest regions of the Island in semi-evergreen to evergreen forest with open canopy. The microhabitat consists of volcanic soils with a dense understory of shrubs, vine thickets, and herbaceous plants with numerous rock outcrops scattered throughout the forest. Leaf litter and rock crevices are used for hiding. Climate in I. forstenii habitat includes average rainfall of 122 cm (48 in) yearly with fairly consistent temperatures including average day time highs of 30-31.5°C (86-89°F) and night time lows of 24°C (75°F). Forsten’s Tortoise is listed in Appendix II of CITES, and as Endangered on the IUCN Red List. Habitat loss and poaching for the international pet and food markets are the major pressures on the wild population. The Turtle Conservancy (TC) has managed a small breeding group of this species (2.3) in captivity since 2007. We provide a habitat with herbaceous plants, leaf litter, well-drained soil, sheltered retreats in a climate-controlled greenhouse with an automated misting system. In the past 2 years we have successfully hatched 8 Forsten’s Tortoises. Nesting is secretive and occurs in moist, loose substrate of wood-based mulch topped with mixed leaf litter. Clutches at TC typically consist of one, and rarely two, oval eggs. We incubate at a constant temperature of 28.4°C ± 0.10°C (83.1°F ± 0.18°F). Small ventilated containers are used with approximately 1 in of hand squeezed moist sphagnum on the bottom, 2 in of 2:1::vermiculite:water (wt:wt) surrounding the egg, topped with another layer of moist sphagnum to cover the egg. Eggs are candled monthly and weights are taken of the container to ensure moisture stays consistent throughout incubation; water is added to the sides of the container if the weight drops more than 10%. We intend to use endoscopy to determine the sex of the hatchlings at this temperature and hope for sufficient ongoing success to perform studies on TDSD.
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