MORPHOLOGIC VARIATION IN AEGLA LEACH (DECAPODA: REPTANTIA: AEGLIDAE) FROM CENTRAL-SOUTHERN CHILE: INTERSPECIFIC DIFFERENCES, SEXUAL DIMORPHISM, AND SPATIAL SEGREGATION
MORPHOLOGIC VARIATION IN AEGLA LEACH (DECAPODA: REPTANTIA: AEGLIDAE) FROM CENTRAL-SOUTHERN CHILE: INTERSPECIFIC DIFFERENCES, SEXUAL DIMORPHISM, AND SPATIAL SEGREGATION
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DOI：
10.1651/10-3324.1
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发表时间：
2011-05-01
影响因子：
1.1
通讯作者：
Jara, Carlos G.
中科院分区：
文献类型：
--
作者：
Barria, Erwin M.;Sepulveda, Roger D.;Jara, Carlos G.
生物体的某些特征，如性别或物种，以及某些生态因素，如与同类个体的相互作用，如何影响小空间尺度上环境设置中身体结构的变异性？利用几何形态测量学方法，对阿劳卡尼岛海萤Aegla araucaniensis、阿劳卡尼岛海萤Aegla araucaniensis、阿劳卡尼岛海萤Aegla araucaniensis和阿劳卡尼岛海萤A. denticulata denticulata和A.绝对的此外，我们评估了是否由同源相互作用的微生境的隔离产生的头胸部的形状在A。araucaniensis，比较人口属于同类行会与密切的人口没有同类的相互作用。头胸形状的变化主要受内在因素的调节，例如物种和个体性别之间的差异。此外，同种间的相互作用并不影响两个种群的甲壳形状的表达。阿劳卡尼西斯。头胸结构的变化模式与以前基于几何形态测量学、传统形态学和描述性形态学的报道相似。种间变异主要是由甲壳边缘的棘突的构型引起的，而由于性二型性的变异是由于雄性的纵轴和雌性的甲壳尾端的扩张引起的。A. araucaniensis不同于以前的比较与其他物种的Aegla相似的环境背景下，但在不同的空间尺度。我们讨论的性别二型从适应的角度来看，并提出，在aeglids的头胸部的架构是一个性状的保守和调节显着的整个进化历史的组。
How do certain characteristics of organisms, such as sex or species, and certain ecological factors, such as interaction with congeneric individuals, influence the variability of body architecture in an environmental setting over a small spatial scale? Using geometric morphometrics we performed a morphological comparison of the dorsal surface of the carapace of a congeneric guild formed by Aegla araucaniensis, A. denticulata denticulata, and A. abtao. Additionally, we evaluated whether the segregation of microhabitat by congeneric interactions generates variations in the shape of the cephalothorax in A. araucaniensis, comparing a population belonging to the congeneric guild with a close population without congeneric interactions. Changes in cephalothoracic shape are regulated primarily by intrinsic factors, such as the differences between species and sex of individuals. In addition, the congeneric interactions do not affect the expression of the carapace shape in either of the populations of A. araucaniensis. The patterns of variation in cephalothoracic architecture are similar to previous reports based on geometric morphometrics, traditional morphology and descriptive morphology. The interspecific variations are caused mainly by the configuration of the spinous processes at the borders of the carapace, while the variation due to sexual dimorphism is due to an expansion of the longitudinal axis in males and the caudal end of the carapace in females. Morphological responses in A. araucaniensis differ from previous comparisons made with other species of Aegla under similar environmental contexts but over distinct spatial scales. We discuss the sexual dimorphism from an adaptive perspective and propose that the architecture of the cephalothorax in aeglids is a trait conserved and regulated significantly throughout the evolutionary history of the group.