Literaturdatenbank
Literaturdatenbank |
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Yang, J.-C., Zhou, Y.-F., Liang, Q.-S., Rao, J.-H., & Li, Z.-R. (2008). Studies on laying and hatching eggs of palea steindachneri. Journal of Jinan University (Natural Science & Medicine Edition), 3.
Added by: Admin (28 Dec 2009 19:57:16 UTC) |
| Resource type: Journal Article BibTeX citation key: Yang2008 View all bibliographic details  |
Categories: General Keywords: Fortpflanzung = reproduction, Habitat = habitat, Palea, Palea steindachneri, Schildkröten = turtles + tortoises, Südostasien = South East Asia, Trionychidae Creators: Li, Liang, Rao, Yang, Zhou Collection: Journal of Jinan University (Natural Science & Medicine Edition) |
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| Abstract |
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Trionychidae The laying and hatching of eggs of Palea steindachneri were studied in Guangzhou in 1997, resulting in the following generalizations. The mature female spawns once a year in May to August,chiefly in June and July.Generally it lays 6～13 eggs,varying individually from a maximum of 28 eggs to a minimum of 2 eggs, with a mean of about 11 eggs.The average weight for one egg evaluated from 300 is 9.58g. White spots emerge on the surface of fertilized eggs 8～20 hour after they are laid.These spots become larger as time goes on.The overall rate of fertilization is 64.77%(2212/3415) in 1997. In natural,the incubation period lasts 70～80 days;under constant temperatures, the higher the temperature, the shorter the incubation period.of 4 experimental groups, the incubation rate of the 28℃ group is highest (95%). at 33℃ all embryoes die. In the paper, we found weight of child Palea steindachneri was relative to size of eggs.
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