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DOI:	10.1371/journal.pone.0091919
论文题名:	Embryo Development inside Female Salamander (Ambystoma jeffersonianum-laterale) Prior to Egg Laying
作者:	Noah D. Charney; John J. Castorino; Megan J. Dobro; Sarah L. Steely
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-3-20
卷:	9, 期:3
语种:	英语
英文关键词:	Salamanders ; Embryos ; Fertilization ; Ponds ; Sperm ; Oviposition ; Amphibians ; Animal sexual behavior
英文摘要:	The length of embryo retention prior to oviposition is a critical evolutionary trait. In all oviparous salamanders, which include the vast majority of species in the order, fertilization is thought to occur at the time of egg laying. Embryos then enter the first cleavage stage several hours after being deposited. This pattern holds for previously studied individuals in the Ambystoma jeffersonianum-laterale complex. Here, we document an instance in which a female Ambystoma jeffersonianum-laterale was carrying embryos internally that had already reached stage 10 of development. Development likely began several days prior to the start of migration to the breeding pond. This is the first such record for any egg-laying salamander, and suggests a degree of plasticity in the timing of fertilization and development not previously recognized. Further work is needed to ascertain the prevalence, mechanics, and evolutionary significance of this phenomenon.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0091919&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/18840
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0091919.PDF（239KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

School of Natural Science, Hampshire College, Amherst, Massachusetts, United States of America;School of Natural Science, Hampshire College, Amherst, Massachusetts, United States of America;School of Natural Science, Hampshire College, Amherst, Massachusetts, United States of America;School of Natural Science, Hampshire College, Amherst, Massachusetts, United States of America

Recommended Citation:

Noah D. Charney,John J. Castorino,Megan J. Dobro,et al. Embryo Development inside Female Salamander (Ambystoma jeffersonianum-laterale) Prior to Egg Laying[J]. PLOS ONE,2014-01-01,9(3)

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