Growth patterns in brooding dinosaurs reveals the timing of sexual maturity in non-avian dinosaurs and genesis of the avian condition

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	Growth patterns in brooding dinosaurs reveals the timing of sexual maturity in non-avian dinosaurs and genesis of the avian condition
	Erickson, Gregory M.; Rogers, Kristina Curry; Varricchio, David J.; Norell, Mark A.; Xu, Xing(徐星); Erickson, GM (reprint author), Florida State Univ, Dept Sci Biol, Tallahassee, FL 32306 USA.
刊名	BIOLOGY LETTERS
	2007
卷号	3 期号:5 页码:558—561
ISSN号	1744-9561
英文摘要	The timing of sexual maturation in non-avian dinosaurs is not known. In extant squamates and crocodilians it occurs in conjunction with the initial slowing of growth rates as adult size is approached. In birds ( living dinosaurs) on the other hand, reproductive activity begins well after somatic maturity. Here we used growth line counts and spacing in all of the known brooding non-avian dinosaurs to determine the stages of development when they perished. It was revealed that sexual maturation occurred well before full adult size was reached - the primitive reptilian condition. In this sense, the life history and physiology of non-avian dinosaurs was not like that of modern birds. Palaeobiological ramifications of these findings include the potential to deduce reproductive lifespan, fecundity and reproductive population sizes in non-avian dinosaurs, as well as aid in the identification of secondary sexual characteristics.
URL标识	查看原文
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/3296]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Erickson, GM (reprint author), Florida State Univ, Dept Sci Biol, Tallahassee, FL 32306 USA.
推荐引用方式 GB/T 7714	Erickson, Gregory M.,Rogers, Kristina Curry,Varricchio, David J.,et al. Growth patterns in brooding dinosaurs reveals the timing of sexual maturity in non-avian dinosaurs and genesis of the avian condition[J]. BIOLOGY LETTERS,2007,3(5):558—561.
APA	Erickson, Gregory M.,Rogers, Kristina Curry,Varricchio, David J.,Norell, Mark A.,Xu, Xing,&Erickson, GM .(2007).Growth patterns in brooding dinosaurs reveals the timing of sexual maturity in non-avian dinosaurs and genesis of the avian condition.BIOLOGY LETTERS,3(5),558—561.
MLA	Erickson, Gregory M.,et al."Growth patterns in brooding dinosaurs reveals the timing of sexual maturity in non-avian dinosaurs and genesis of the avian condition".BIOLOGY LETTERS 3.5(2007):558—561.