Biomass and instar estimation of larvae of Phylloicus cressae Prather, 2003 (Trichoptera, Calamoceratidae) in a montane forest stream, northcentral Venezuela

IF 0.5 4区农林科学 Q4 ENTOMOLOGY Aquatic Insects Pub Date : 2021-05-06 DOI:10.1080/01650424.2021.1908565

Margenny Barrios, J. Montoya

引用次数: 1

Abstract

Abstract Biological and ecological aspects of organisms are important to understand the role of species in aquatic ecosystems. Measuring growth rate is useful to analyse these aspects through the estimation of instar and biomass in aquatic insects like shredder trichopterans. We aimed to produce allometric relationships based on larval body parts and case dimensions to estimate larval instars and biomass for Phylloicus cressae Prather, 2003. Here, we showed that classification tree analysis and power and exponential models proved that dorsal and ventral length of cases were good predictors of larval instars and biomass for P. cressae. We also found that allometric relationships involving the length of the prothoracic mid-dorsal ecdysial suture were suited for assessing larval instars but performing these measurements on cased trichopterans is difficult without damaging them. So, allometric models like ours, based on case dimensions, are invaluable when dealing with live individuals.

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委内瑞拉中北部山区森林溪流中水甲Phylloicus cresae Prather，2003（毛翅目，水甲科）幼虫的生物量和龄期估计

生物和生态方面的生物是重要的，以了解物种在水生生态系统中的作用。测量生长速率有助于通过估算碎毛虫等水生昆虫的龄期和生物量来分析这些方面。本研究的目的是建立基于叶根(Phylloicus cressae Prather, 2003)幼虫身体部位和虫体尺寸的异速生长关系，以估计其幼虫龄和生物量。本研究表明，分类树分析、幂指数模型和指数模型证明了壳的背侧和腹侧长度可以很好地预测壳的幼虫龄和生物量。我们还发现，涉及前胸中背背外侧缝线长度的异速关系适合于评估幼虫龄，但在不损害它们的情况下对病例trichopterans进行这些测量是困难的。所以，像我们这样基于个案维度的异速生长模型，在处理活生生的个体时是非常宝贵的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aquatic Insects 生物-昆虫学

CiteScore

2.00

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： Aquatic Insects is an international journal publishing original research on the systematics, biology, and ecology of aquatic and semi-aquatic insects. The subject of the research is aquatic and semi-aquatic insects, comprising taxa of four primary orders, the Ephemeroptera, Odonata, Plecoptera, and Trichoptera but also aquatic and semi-aquatic families of Hemiptera, Coleoptera, and Diptera, as well as specific representatives of Hymenoptera , Lepidoptera, Mecoptera, Megaloptera , and Neuroptera that occur in lotic and lentic habitats during part of their life cycle. Studies on other aquatic Hexapoda (i.e., Collembola) will be only accepted if space permits. Papers on other aquatic Arthropoda (e.g., Crustacea) will not be considered, except for those closely related to aquatic and semi-aquatic insects (e.g., water mites as insect parasites). The topic of the research may include a wide range of biological fields. Taxonomic revisions and descriptions of individual species will be accepted especially if additional information is included on habitat preferences, species co-existing, behavior, phenology, collecting methods, etc., that are of general interest to an international readership. Descriptions based on single specimens are discouraged. Detailed studies on morphology, physiology, behavior, and phenology of aquatic insects in all stadia of their life cycle are welcome as well as the papers with molecular and phylogenetic analyses, especially if they discuss evolutionary processes of the biological, ecological, and faunistic formation of the group.