Prey selectivity of the invasive largemouth bass towards native and non-native prey: an experimental approach

IF 2 4区生物学 Q1 ZOOLOGY

Neotropical Ichthyology Pub Date : 2022-01-01 DOI:10.1590/1982-0224-2021-0123

Liliana Paola Cárdenas-Mahecha, J. Vitule, A. Padial

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引用次数: 0

Abstract

Abstract Non-native predators are known to cause ecological impacts through heightened consumption of resources and decimation of native species. One such species is Micropterus salmoides. Often introduced for sport fishing worldwide; it has been listed by International Union for Conservation of Nature and Natural Resources as one of the 100 of the world’s worst invasive species. Whilst impacts conferred towards native prey are well known, its relationship with other non-native species has received much less attention. Therefore, the aim of this study was to experimentally investigate the feeding preference of M. salmoides towards native prey (Geophagus iporangensis) compared to non-native prey (Oreochromis niloticus and Coptodon rendalli) using comparative consumption and the Manly-Chesson selectivity index. We found a higher consumption by M. salmoides towards the non-native prey and a tendency for this non-native preference to increase when prey availability increased. Our results are in line with the hypothesis that the invasion of the non-native predator can be facilitated by the high abundance and reproductive rate of the non-native prey. This is relevant considering the interaction of multiple invaders in an ecosystem, in particular environments modified by humans. Interspecific relationships are complex and their understanding is necessary for environmental management decision-making.

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入侵大口黑鲈对本地和非本地猎物的选择性:一种实验方法

摘要:众所周知，非本地捕食者通过增加资源消耗和大量捕杀本地物种而造成生态影响。其中一种是小翼鱼。经常被引入世界范围的钓鱼运动;它已被国际自然和自然资源保护联盟列为世界上100个最严重的入侵物种之一。虽然对本地猎物的影响是众所周知的，但它与其他非本地物种的关系却很少受到关注。因此，本研究的目的是通过比较食性和Manly-Chesson选择指数，实验研究salmoides对本地猎物(Geophagus iporangensis)和非本地猎物(Oreochromis niloticus和Coptodon rendalli)的取食偏好。我们发现salmoides对非本地猎物有较高的消耗，并且随着猎物可得性的增加，这种非本地偏好有增加的趋势。我们的研究结果与假设一致，即外来捕食者的高丰度和高繁殖率可以促进外来捕食者的入侵。考虑到生态系统中多种入侵者的相互作用，特别是人类改变的环境，这是相关的。种间关系是复杂的，了解它们对环境管理决策是必要的。

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

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.