南非蝎的两性二态性和静态异速发育

Q3 Agricultural and Biological Sciences
J. Visser, S. Geerts
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引用次数: 0

摘要

摘要:蝎子的两性二态性通常是在身体部位的相似子集中检索到的,并且被认为是在每种性别的同源结构上运行的替代选择类型的结果。即便如此,使用静态异速生长作为检验与选择有关的特定假设的方法的研究仍然有限。大多数南非蝎子的性别二型性调查很少,特别是在Opistophthalmus属,其中特有的Karoo穴居蝎子O. karrooensis几乎完全缺乏数据。目前的研究基于外部形态调查了O. karrooensis的两性二态性和静态异速生长模式。根据甲壳长度的特征尺度,雌雄二态模式表明雄性附属物(肢节、腿、果胶、瘤和肢节)的伸长,而雌性则表现出更宽的身体和更宽、更厚的肢节。这些模式可能表明,女性的繁殖能力和亲代照顾能力有所提高,再加上久坐不动的生活方式和多样化的喂养策略。相反,雄性的形态可能适应更大的灵活性,但也应该在配偶追踪和性互动中发挥作用。与这些解释一致,两性的身体部位都显示出静态异速模式(至少部分地)指向自然选择或性选择的潜在影响,但进一步揭示了许多身体部位存在激烈选择的可能性。总之,形成蝎子形态的选择力可能是复杂的,与身体部位的多种功能和两性之间的生活史差异有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sexual dimorphism and static allometry in the South African scorpion Opistophthalmus karrooensis
Abstract Sexual dimorphism in scorpions is generally retrieved for a similar subset of body parts and is presumed to result from alternative types of selection operating on homologous structures in each sex. Even so, investigations which use static allometry as a method for testing specific hypotheses relating to selection remain limited. Sexual dimorphism in the majority of South African scorpion species is poorly investigated, especially in the genus Opistophthalmus, of which the endemic Karoo burrowing scorpion O. karrooensis is nearly completely data deficient. The current study investigates patterns of sexual dimorphism and static allometry in O. karrooensis, based on external morphology. Following character scaling on carapace length, patterns of sexual dimorphism in this species indicate the elongation of male appendages (pedipalp segments, legs, pectines, metasoma, and telson), while females display wider bodies and wide, thick pedipalp segments. These patterns possibly point to an enhanced reproductive output and parental care in females, coupled to a sedentary lifestyle and generalist feeding strategy. Conversely, the male morphology is likely adapted for greater vagility, but should also function during mate-trailing and sexual interactions. In line with these explanations, the body parts in both sexes indicate static allometric patterns pointing (at least in part) to the potential influence of either natural or sexual selection, but further reveal the possibility of intense selection on a number of body parts. Taken together, the selective forces which shape scorpion morphology may be complex, relating to multiple functions of body parts and life-history differences between the sexes.
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来源期刊
Arachnology
Arachnology Agricultural and Biological Sciences-Insect Science
CiteScore
1.70
自引率
0.00%
发文量
49
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