摘要
产卵次序可对鸟类卵黄中的营养成分、卵壳色素以及卵壳厚度等产生影响。一些鸟类可通过产卵次序对不同卵的资源进行分配,从而实现繁殖成效的最大化。本研究对不同产卵次序下山麻雀(Passer cinnamomeus)的卵色、卵大小和卵重量进行分析,结果表明,山麻雀的卵重和卵大小随着产卵次序并无显著变化,卵色与卵的大小和重量均无显著相关性,但卵背景的色度随产卵次序有明显下降趋势,而卵斑点密度则呈相反的变化。卵背景的色度随产卵次序下降可能是山麻雀有限的色素在卵中不均匀分配的结果,而卵斑点密度的增加则可能是对后期卵壳厚度变薄的一种补偿。
Egg laying order in birds has important impact on the nutritional ingredients in egg yolk, egg shell pigments and egg shell thickness. Some bird species may control their resource allocation in eggs to achieve the optimal reproductive output by different egg laying order. Here we investigated egg coloration, egg size and egg mass with egg laying order in Russet Sparrow （Passer cinnamomeus） and analyzed their relationships. We found that egg mass increased with egg size in this sparrow, and both of them were not changed with the egg laying order. Furthermore, neither egg size （F4,77 = 0.356, P = 0.839, ANOVA） nor egg mass （F4,77 = 0.391, P = 0.815, ANOVA） correlated with egg coloration （Fig. 1）. However, the chroma of egg background color decreased whilst egg markings density （Fig. 2） increased with the egg laying order. The decrease in egg background chroma （Fig. 3） may reflect the allocation of limited pigments within a clutch while the change in egg markings density implied that Russet Sparrow might increase egg markings density to compensate for the decrease in eggshell thickness with the egg laying order.
出处
《动物学杂志》
CAS
CSCD
北大核心
2016年第5期907-913,共7页
Chinese Journal of Zoology
基金
国家自然科学基金项目(No.31260514,31272328,31472013)
教育部新世纪优秀人才支持计划项目(NCET-13-0761)
关键词
色度
卵斑密度
卵色素分配
山麻雀
Egg chroma
Egg markings density
Egg pigment allocation
Russet Sparrow, Passer cinnamomeus
