巴西东南部São Francisco河产拟鳞齿龙的体型变化(Characiformes:Stethaprioninae)

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY
Acta Zoologica Pub Date : 2022-01-21 DOI:10.1111/azo.12415
Igor Henrique Rodrigues-Oliveira, Karine Frehner Kavalco, Rubens Pasa
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引用次数: 1

摘要

利氏假齿龙是旧金山河流域特有的一种四齿龙,根据细胞遗传学和分子研究,它代表了一个复杂的物种。本工作的目的是通过几何形态计量学来确定旧金山河上游和中部流域七个rivularis种群体型的形态学差异。我们总共拍摄了174个身体右侧的个体,每张图像上有17个地标被数字化。为了研究异速测量对形状的影响,我们进行了回归分析,并进行了典型变异分析,以研究不同采集点和子盆地的形状调节。我们发现,采集点和亚盆之间的形状差异与相对身体高度和眶下板后坐力有关,此外,大小对与腹侧头骨、眼眶和眶下盘有关的标本形状(异速测量)也有显著影响。我们没有设想男性和女性在体型上的差异。几项关于鱼类的研究将身高与水流速度联系起来,而亚轨道板块反冲显示出分类学或生态学的潜力,这标志着旧金山河上游和中部种群之间的主要差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Body shape variation in the Characid Psalidodon rivularis from São Francisco river, Southeast Brazil (Characiformes: Stethaprioninae)

Psalidodon rivularis is a species of tetra endemic to the São Francisco River basin and, based on cytogenetic and molecular studies, represents a complex of species. The objective of the present work was to identify morphological differences in the body shape of seven populations of Privularis from the Upper and Middle São Francisco River basin through geometric morphometry. In all, we photographed 174 individuals on the right side of the body and 17 landmarks were digitized on each image. To study the effects of allometry on the shape, we performed regression analysis and, to study shape modulation at different collection points and sub-basins, the canonical variation analyses. We found differences in shape between collection points and sub-basins associated with relative body height and sub-orbital plate recoil, in addition to a significant influence of size on specimen shape (allometry) associated with the ventral skull, orbits and sub-orbital plate. We do not envision differences in body shape between males and females. Several works with fish relate body height with water velocity, while the sub-orbital plate recoil shows a taxonomic or ecological potential, marking the main difference between the populations of the Upper and Middle São Francisco River.

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来源期刊
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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