Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

IF 0.5 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY Ciencias Marinas Pub Date : 2021-06-02 DOI:10.7773/cm.v47i2.3132

Pamela Molina-Salgado, J. Alfaro‐Shigueto, Adriana González-Pestana

引用次数: 3

Abstract

Batoids are among the least studied group of vertebrates and one of the most vulnerable to fishing. The rasptail skate, Rostroraja velezi, is a bycatch species in northern Peru for which there are no studies on its diet. This research aims to document the diet of R. velezi on the northern Peruvian coast and to determine if there are sex-based differences in the diet. A total of 74 R. velezi stomachs were collected, 59 of which had stomach contents. The cumulative prey curve showed reliability in the number of samples collected. According to the prey-specific index of relative importance, diet was dominated by Acanthephyra sp. (31%), other unidentified Caridea (15%), and unidentified teleosts (17%). A low significant difference in diet between sexes was found (R = 0.21, P < 0.01). The trophic position of R. velezi was 3.9 ± 0.7. This species displays bentopelagic feeding behavior and it is a secondary predator in northern Peru.

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秘鲁皮乌拉附近的锉尾鳐Rostroraja velezi（Rajiformes:Rajidae）的饮食

蝙蝠是研究最少的脊椎动物之一，也是最容易被捕捞的脊椎动物之一。锉尾冰鞋Rostroraja velezi是秘鲁北部的一种副渔获物，目前尚未对其饮食进行研究。这项研究旨在记录秘鲁北部海岸的R.velezi的饮食，并确定饮食中是否存在基于性别的差异。共收集了74个R.velezi胃，其中59个胃内容物。累积猎物曲线显示了所收集样本数量的可靠性。根据相对重要性的猎物特异性指数，饮食以金黄色藻（31%）、其他未鉴定的Caridea（15%）和未鉴定的硬骨鱼（17%）为主。性别间饮食差异不显著（R=0.21，P<0.01）。该物种表现出底栖动物的觅食行为，是秘鲁北部的次级捕食者。

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

Ciencias Marinas 生物-海洋与淡水生物学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： A bilingual open-access publication, Ciencias Marinas (CM) is an international peer-reviewed journal that contains original research findings in all areas of marine science. It is published quarterly by the Autonomous University of Baja California, Mexico, and all its contents are publicly available on our journal website. Though a limited number of copies are still printed, the journal is mainly distributed in its electronic format. CM was conceived in 1973 as part of an academic project aimed to entice local researchers to publicly disclose their findings by adopting the culture of peer-review publishing. This academic project evolved into an international journal after accepting papers from researchers in the United States and, eventually, other parts of the world. Because of the diversity in authorship, CM issues were initially published in either Spanish or English, and occasionally in both languages. It was not until 1984 when CM included both language versions of all its contents, and it then became the fully bilingual journal it still is today. At CM we believe our inclusive format allows us not only to address a wider range of submissions from international authors but also to make published findings available to a wider international audience. So whether you are looking for information on the redfish in Icelandic waters or the physical and biological properties of the Gulf of California, feel free to peruse CM contents. You may find them to provide source material for your research.