Literaturdatenbank
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Zheng, G.-M., Ma, L.-S., Zhu, X.-P., Liu, Y.-H., Chen, Y.-L., & Luo, J.-R. (2008). Age and growth of platysternon megacephalum (gay) and difference in growth and morphology between males and females. Journal of South China Agricultural University, 3.
Added by: Admin (28 Dec 2009 19:57:18 UTC) Last edited by: Beate Pfau (02 Jan 2010 11:11:33 UTC) |
| Resource type: Journal Article BibTeX citation key: Zheng2008a View all bibliographic details  |
Categories: General Keywords: Habitat = habitat, Haltung = husbandry, Morphologie = morphology, Physiologie = physiology, Platysternidae, Platysternon, Platysternon megacephalum, Schildkröten = turtles + tortoises, Südostasien = South East Asia Creators: Chen, Liu, Luo, Ma, Zheng, Zhu Collection: Journal of South China Agricultural University |
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| Abstract |
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The age and growth of Platysternon megacephalum (GAY),difference in growth and morphology between males and females were studied,The body mass,carpace length,carpace width,plastron length,plastron width and body height increased with age.The turtle had different growth rates at different ages,particularly high growth at 3-4 years of age and low growth at 4-5 years of age,and the growth curve of body mass and age was m=20.346e0.661 2t.There were significantly positive-relationships between body mass and carpace length,carpace width,plastron length,plastron width,body height,carpace width and carpace length,plastron width and plastron length,carpace length and plastron length,respectively(P0.01).The sex ratio is about 1∶1.The ANOVA results indicated that the difference in carpace width/carpace length between males and females was not significant at 1-2 years of age,significant at 3 years of age(P0.05),females growing to rotundity and males to ellipse.Females had significantly wider head at 5 years of age on head with/ carpace length(P0.05).Also there were differences in growth rates between males and females.Males and females were similar at 1-2 year of age,but males grew faster than females at 2 and 3 years of age.At 4-5 years of age,the growth rate of females increased abruptly,while the body mass of females is 1.12 times of males.
Added by: Admin Last edited by: Beate Pfau |