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古脊椎动物学报 ›› 1992, Vol. 30 ›› Issue (02): 120-134.

• 古脊椎动物学报 • 上一篇    下一篇

广东南雄晚白垩世恐龙蛋孵化期的微环境

牟耘   

  • 出版日期:1992-06-15 发布日期:1992-06-15

NEST ENVIRONMENTS OF THE LATE CRETACEOUS DINOS AUR EGGS FROM NANXIONG BASIN, GUANGDONG PROVINCE

Mou Yun   

  • Online:1992-06-15 Published:1992-06-15

摘要: 本文通过测量南雄盆地晚白垩世的三种恐龙蛋的蛋壳结构,估算了胚胎在正常发育的情况下蛋壳对水蒸汽和呼吸气体的传导率。结果发现,同现生鸟蛋的有关量相比,南雄恐龙蛋的气体传导率很高,蛋窝微环境具有湿度高、氧气含量低和二氧化碳含量高的特点。笔者推测这三种恐龙蛋是埋藏孵化的。从蛋壳结构来看,导致高气体传导率的直接因素是蛋壳上单个气孔的平均横截面积较大。 南雄的这三种恐龙蛋的气体传导率与蒙古“原角龙”的蛋的相应值很接近,而与法国恐龙蛋的相差很多。

Abstract: As dinosaurs were oviparous animals, incubation of their eggs was the essential procedure during their reproduction. Physiologically, eggshell microstructures were bound to adapt to the nest environments during incubation if embryos normally developed. Gas conductance estimated from eggshell morphology can provide evidence for the environment conditions in nests. Seymour (1979) first estimated gas coaductance of dinosaur eggs from France and Mongolia and indicated that the nest environments of these eggs were all high in humidity, low in oxygen and high in carbon dioxide. Such conditions most likely occurred underground or within incubation mounds. Williams et al. (1984) found similar nest environments of four kinds of dinosaur eggs from Aix Basin in southern France. Some papers about dinosaur eggs indicated that the extinction of dinosaurs would be related to their reproduction (Erbcn, 1970; Erben, Hoeffs et al. 1979; Zhao, 1978; Zhao, Ye et al. 1991). Thus further investigations about reproduction of dinosaurs in Late Cretaceous might be significant. This paper will reconsider the relationship between dinosaur eggs and their environments.