Literaturdatenbank
Literaturdatenbank |
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Zhao, W.-H., Zhu, X.-P., Wei, C.-Q., Du, H.-J., & Chen, Y.-L. (2008). Observation on the embryonic development of yellow pond turtle, mauremys mutica cantor 1842. Acta Hydrobiologica Sinica, 32(5), 649–656.
Added by: Sarina Wunderlich (30 Jun 2012 22:02:07 UTC) |
| Resource type: Journal Article BibTeX citation key: Zhao2008 View all bibliographic details  |
Categories: General Keywords: Geoemydidae, Mauremys, Mauremys mutica, Schildkröten = turtles + tortoises, Zeitigung = incubation Creators: Chen, Du, Wei, Zhao, Zhu Collection: Acta Hydrobiologica Sinica |
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| Abstract |
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Yellow pond turtle (Mauremys mutica Cantor) is a common fresh water turtle in the south of China and it belongs to Testudinate, Emydidae and Mauremys. Owing to the high value of the turtle in food, remedy and view, people like it very much. In recent years, the resource of yellow pond turtle has been affected and the quantity is sharply reduced because of human's activity and the change of environment. Now it is listed as an animal in danger. Artificial propagation and culture are the methods to protect the yellow pond turtle. There were some reports about the reproduction of the turtle, but no reports about the embryonic development of yellow pond turtle. In order to understand the turtle well and to protect this species, the turtle embryonic development was being observed and studied. Under the condition of (29 0.5)C temperature, 80%-93% relative humidity and 5%-10% moisture content of sand, the yellow pond turtle hatchlings were hatched after 67 days incubation. The period of embryonic development was divided into twenty-two stages according to the embryo daily age, size and morphological characters. The major morphological characters of every stage are described respectively. Stages I to 7 were affirmed mainly by size of vitelline vessel area, numbers of somites and shape of heart. Stages 8 to 22 were affirmed mainly by the shape changes of limbs, carapace and plastron. While embryonic developed, some data, such as width of head and eyes, length and width of carapace were measured and statisticed. The results indicated that the relationship among head width, eye width, carapace length, carapace width and daily age were quite significant. With comparison the embryonic development and the changes on shell surface of the fertilized eggs in incubation, some relationship between the stage of embryonic development and white spot of shell were found. At stage 1, a white spot appears on the middle surface of the egg. At stages 5 to 7 the white spot forms a white ring around the egg perimeter and at stages 20 to 21 the width of white ring stops increasing. So the stages of embryonic development would be detected by observation the white spot of the egg and the method would benefit with science research and practice of turtles.
Added by: Sarina Wunderlich |