菲律宾拉古纳湾入侵刀鱼（Chitala ornata）的两性异形

Q3 Environmental Science

Philippine Journal of Systematic Biology Pub Date : 2020-05-11 DOI:10.26757/pjsb2019a13011

Jhon Michael C. Castro, J. C. Gonzales, M. Camacho

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引用次数: 4

摘要

Chitala ornata（J.E.Gray）（骨舌形目：Notopteriae）自此在拉古纳湾建立了丰富而令人讨厌的种群。对像C.ornata这样的入侵物种制定管理策略的一个基本前提是充分了解其生活史特征，包括两性异形。在本研究中，我们研究了C.ornata的两性异形。ornata的性别可以通过检查其生殖乳头来区分，其中雌性对产卵基质上的有效产卵表现出不同的形态适应。对几种形态计量学特征的均值比较和多元分析表明，角锥虫的性别大小二型性是雌性偏性的，这主要归因于两性生殖资源支出的差异以及雌性在产生更多后代和更好生存机会方面的大小依赖优势。

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Sexual dimorphism of invasive knifefish (Chitala ornata) in Laguna de bay, Philippines

Chitala ornata (J.E. Gray) (Osteoglossiformes: Notopteridae) has since established abundant and nuisance populations in Laguna de Bay. A fundamental prerequisite for the development of management strategies for invasive species like C. ornata is a full understanding of its life history characteristics including sexual dimorphism. In the present study, we examined the sexual dimorphism of C. ornata. Sexes of C. ornata can be distinguished through the examination of its genital papilla wherein females show distinct morphological adaptions for effective oviposition on a spawning substrate. Comparison of means and multivariate analysis of several morphometric characters showed that sexual size dimorphism in C. ornata is female-biased which is mainly attributed to the disparity of resource expenditure between sexes for reproduction and size-dependent advantages of females in the production of more progenies with better chances of survival.

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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.