Early development of two commercially valuable fish from the lower Amazon River, Brazil (Characiformes: Serrasalmidae)

IF 2 4区生物学 Q1 ZOOLOGY

Neotropical Ichthyology Pub Date : 2022-01-01 DOI:10.1590/1982-0224-2021-0024

L. Oliveira, R. Cajado, F. Silva, M. Andrade, D. Zacardi

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引用次数: 2

Abstract

Abstract We described the early development of Myloplus asterias and M. lobatus, two fish species of the Serrasalmidae using morphological, meristic, and morphometric characteristics. These herbivores serrasalmids are heavily fished because of their commercial importance in the Amazon. The individuals were collected between 2016 and 2020 in the limnetic zone of open water and macrophyte stands in the Lower Amazon River floodplain. We tested different growth models to identify the development pattern of these species. During the initial ontogeny, these two species can be differentiated mainly by the myomeres total number, 37 to 39 in M. asterias vs. 40 to 41 in M. lobatus, the pigmentation pattern, and dorsal-fin ray numbers. These characteristics are effective in distinguishing these species from other serrasalmids. The morphometric relationships were also different between these two species, showing distinct patterns in growth between the analyzed features. An identification key for larvae of some sympatric Serrasalmidae species from the Amazon basin is presented. Our expectation is that this study will contribute to the knowledge of the initial ontogeny and the biology of fish species in the Neotropical region.

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巴西亚马孙河下游两种具有商业价值的鱼类的早期发育(特征:沙蚕科)

摘要利用形态学、分生和形态计量学特征描述了沙蚕科两种鱼Myloplus asterias和M. lobatus的早期发育。由于在亚马逊地区具有重要的商业价值，这些食草动物被大量捕捞。这些个体是在2016年至2020年期间在亚马逊河下游漫滩的开放水域和大型植物林的边缘地带收集的。我们测试了不同的生长模型来确定这些物种的发育模式。在个体发育初期，这两个物种的主要区别是肌粒总数(星形尾鱼为37 ~ 39个，小叶尾鱼为40 ~ 41个)、色素沉着模式和背鳍鳍的数量。这些特征是区分这些物种与其他serrasalmids的有效方法。这两个物种之间的形态计量关系也不同，在所分析的特征之间表现出不同的生长模式。提出了一种亚马逊河流域同域沙蚕科几种幼虫的识别钥匙。我们期望这项研究将有助于了解新热带地区鱼类物种的初始个体发生和生物学。

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

Neotropical Ichthyology 生物-动物学

CiteScore

2.80

自引率

17.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Neotropical Ichthyology is the official journal of the Sociedade Brasileira de Ictiologia (SBI). It is an international peer-reviewed Open Access periodical that publishes original articles and reviews exclusively on Neotropical freshwater and marine fishes and constitutes an International Forum to disclose and discuss results of original research on the diversity of marine, estuarine and freshwater Neotropical fishes. -Frequency: Four issues per year published only online since 2020, using the ‘rolling pass’ system, which posts articles online immediately as soon as they are ready for publication. A searchable and citable Digital Object Identifier (DOI) is assigned to each article immediately after online publication, with no need to await the issue’s closing. -Areas of interest: Biology, Biochemistry and Physiology, Ecology, Ethology, Genetics and Molecular Biology, Systematics. -Peer review process: The Editor-in-Chief screens each manuscript submitted to Neotropical Ichthyology to verify whether it is within the journal’s scope and policy, presents original research and follows the journal’s guidelines. After passing through the initial screening, articles are assigned to a Section Editor, who then assigns an Associate Editor to start the single blind review process.