Sexual dimorphism in the Spotted Stinger Inimicus sinensis (Valenciennes, 1833) and notes on pore structures on the body

Q3 Environmental Science

Philippine Journal of Systematic Biology Pub Date : 2020-02-25 DOI:10.26757/pjsb2019a13004

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引用次数: 1

Abstract

Spotted stinger individuals, Inimicus sinensis, collected from Carles, Iloilo, Philippines exhibited previously-unreported sexual dimorphism. Thirty-three morphological measurements, including standard length, and fourteen meristic counts from 99 specimens (47 males and 52 females) were analyzed for sexual dimorphism. Most morphometric characters differed significantly between the sexes, whereas no differences were found in meristic counts. Dorsal and anal-fin and free pectoral-fin ray lengths were greater in male specimens. On the other hand, the head and body region were relatively larger in female specimens. Principal Component Analysis (PCA) extracted two principal components from significantly different parameters, which explained 62.29 % of the cumulative variances. Variations in the two major components resulted from: head width, upper jaw, lower jaw, snout, pre-dorsal, pre-anal-fin, and anal-fin base lengths in PC1 (45.65 %); and orbit diameter and anal-fin base length in PC2 (16.64 %). Additionally, a single anterolateral pore on the body and pores above the lateral-line are described, although no evidence of association with other organs was found.

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中华斑点毒刺的两性异形（Valenciennes，1833）及其体孔结构的研究

从菲律宾伊洛伊洛的Carles采集的斑点毒刺个体中华蟾蜍表现出以前未报道的两性异形。对来自99个标本（47只雄性和52只雌性）的33个形态学测量值（包括标准长度）和14个分生组织计数进行了性别二型分析。大多数形态计量学特征在性别之间存在显著差异，而在分生组织计数方面没有发现差异。雄性标本的背鳍、臀鳍和胸鳍自由射线长度较大。另一方面，女性标本的头部和身体区域相对较大。主成分分析（PCA）从显著不同的参数中提取了两个主成分，解释了62.29%的累积方差。PC1中两个主要成分的变化是由以下因素引起的：头部宽度、上颌、下颌、吻部、背鳍前、肛门前鳍和肛门鳍基部长度（45.65%）；PC2的眼眶直径和肛门鳍基部长度（16.64%）。此外，尽管没有发现与其他器官相关的证据，但描述了身体上的单个前外侧孔和侧线上方的孔。

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

Philippine Journal of Systematic Biology Environmental Science-Ecology

CiteScore

1.50

自引率

0.00%

发文量

期刊介绍： The Philippine Journal of Systematic Biology (Print ISSN: 1908-6865; Online ISSN: 2508-0342) is an annual, peer-reviewed journal in English that publishes high quality reports of original research and reviews in the field of Taxonomy & Systematics, Ecology and Conservation Biology. The PJSB is a CHED recognized journal under CHED CMO 50 series of 2017. It is also included in the Clavariate Analysis (formerly a subsidiary of Thomson Reuters) Master Journal List under Zoological Record, BIOSIS Previews and Biological Abstracts.The PJSB is the official publication of the Association of Systematic Biologists of the Philippines (SEC Registration: Association of Philippine Taxonomists, Inc.). The organization financially supports the journal and all its endeavors. The journal aims to build up quality information on animal, plant and microbial diversity in the Philippines. Articles dealing with original research or reviews in Zoological, Botanical or Microbial Systematics, Ecology and Conservation Biology are welcome. Authors are advised to consult a recent issue of PJSB for the current format and style. All manuscripts are reviewed by at least two qualified referees.