Literaturdatenbank
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Wyrwich, L. , Egg development in manouria emys phayrei - 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 Unpublished paper presented at Program and Abstracts of the Tenth Annual Symposium on the Conservation and Biology of Tortoises and Freshwater Turtles.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 18:23:15 UTC) |
| Resource type: Conference Paper BibTeX citation key: anon2012.14775 View all bibliographic details  |
Categories: General Keywords: Haltung - husbandry, Manouria emys, Schildkröten - turtles + tortoises, Testudinidae, Zeitigung - incubation Creators: Wyrwich 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 Burmese Black Mountain Tortoise (Manouria emys phayrei) is an endangered species that lives in montane forests of Southeast Asia. It is the largest mainland tortoise in Asia and is one of only two species of chelonian known to construct a nest above ground with vegetative matter. However, little else is known about its life history. Knowledge gained through captive collections can provide insight into improving husbandry techniques that may ultimately improve reproduction and conservation of the species we protect. In 2011, a clutch of 54 eggs was evaluated throughout their development in order to assess progression of future clutches. The eggs were evenly divided into incubators at 26.1°C (79°F) and 30 °C (86°F) in uniform incubation parameters. Eggs were observed once weekly and the developmental progress was noted and photographed. Five eggs at each temperature were not observed, representing a control to determine any possible effects of handling to development. For each observation session, the color, shape, and texture of the eggshell was recorded and then each egg was candled in order to record embryonic development (presence of vessels, embryo shape, orientation, and size). With an 81% hatch rate (44/54eggs), this study brought a better understanding of egg viability and developmental patterns in this species. This study also resulted in a number of new questions to be answered by future projects. In addition to egg incubation and development, nesting behavior, husbandry, and hatchling care will be discussed.
Added by: Admin |