石螯虾的形态多样性——传统和几何形态计量方法

IF 1.6 3区 环境科学与生态学 Q3 FISHERIES
Leona Lovrenčić, Vjera Pavić, Stefan Majnarić, L. Abramovic, M. Jelić, I. Maguire
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引用次数: 5

摘要

Austropotamobius torrentium是生活在克罗地亚淡水中的四种欧洲本土小龙虾之一。结果表明,在菟丝子中存在8个不同的单系mtDNA系统群;其中6种分布在克罗地亚,其迪纳里亚中北部地区的遗传多样性最高。最近对石螯虾形态变异的小规模研究表明,石螯虾在不同系群之间存在显著差异。在本研究中,更大的样本量,涵盖了五个系统群的种群,分析的目的是确定是否存在形态学特征,可靠地将石螯虾从不同的系统群中分离出来。为此,对245只石螯虾进行了传统(TM)和几何形态计量学(GM)分析。多变量判别分析包括每只小龙虾的24个TM特征,而GM包括对头侧背侧22个标志的分析。两种方法的分析结果一致,不同系群的分析特征差异显著,其中头头形状对小龙虾的鉴别贡献最大。研究证实,这两种方法与统计方法相结合,在区分和分离小龙虾类群方面是有用的。本研究结果与以往的分子研究结果一致;石螯虾有几个不同的进化谱系,其物种地位目前尚未确定,急需澄清。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Morphological diversity of the stone crayfish − traditional and geometric morphometric approach
Austropotamobius torrentium is one of four native European crayfish species inhabiting Croatian freshwaters. Existence of eight divergent monophyletic mtDNA phylogroups was described within A. torrentium; six of them are distributed in Croatia, with the highest genetic diversity established in its northern-central Dinaric region. Recent small-scale study of the stone crayfish morphological variability indicated significant differences among different phylogroups. In the present study larger sample size, covering populations from five phylogroups, was analysed with the aim of determining whether there are morphological characteristics that reliably separate stone crayfish from different phylogroups. Aiming this, 245 stone crayfish were analysed through traditional (TM) and, for the first time, geometric morphometric (GM) analyses. Multivariate discriminant analyses included 24 TM characteristics per crayfish, while GM comprised analyses of 22 landmarks on the dorsal side of cephalon. Both methods revealed congruent results, and significant differences among phylogroups in analysed features were obtained, with the cephalon shape contributing the most to crayfish discrimination. Research confirmed that both approaches, combined with statistical methods, are useful in distinguishing and separating crayfish phylogroups. Findings of present study are compatible with the previous molecular findings; stone crayfish present several distinct evolutionary lineages whose species status are currently undefined and require urgent clarification.
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来源期刊
Knowledge and Management of Aquatic Ecosystems
Knowledge and Management of Aquatic Ecosystems 环境科学-海洋与淡水生物学
CiteScore
3.70
自引率
5.60%
发文量
22
审稿时长
>12 weeks
期刊介绍: Knowledge and Management of Aquatic Ecosystems (KMAE-Bulletin Français de la Pêche et de la Pisciculture since 1928) serves as a foundation for scientific advice across the broad spectrum of management and conservation issues related to freshwater ecosystems. The journal publishes articles, short communications, reviews, comments and replies that contribute to a scientific understanding of freshwater ecosystems and the impact of human activities upon these systems. Its scope includes economic, social, and public administration studies, in so far as they are directly concerned with the management of freshwater ecosystems (e.g. European Water Framework Directive, USA Clean Water Act, Canadian Water Quality Guidelines, …) and prove of general interest to freshwater specialists. Papers on insular freshwater ecosystems and on transitional waters are welcome. KMAE is not a preferred journal for taxonomical, physiological, biological, toxicological studies, unless a clear link to ecological aspects can be established. Articles with a very descriptive content can be accepted if they are part of a broader ecological context.
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