New Records and Invasion Risk of the Non-Native Piranha Serrasalmus maculatus (Characiformes, Serrasalmidae) in the Merin Lagoon Basin

IF 1.6 4区环境科学与生态学 Q3 ECOLOGY

Austral Ecology Pub Date : 2025-06-23 DOI:10.1111/aec.70090

Nicolás Vidal, Marcelo Dias de Mattos Burns, José Carlos Guerrero, Marcelo Loureiro

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引用次数: 0

Abstract

Serrasalmus maculatus (Characiformes, Serrasalmidae) is a piranha native to the Río de la Plata and Amazon basins. Recently, it was recorded in the Patos Lagoon basin. Patos and Merin lagoons are connected by the São Gonçalo channel. Based on information provided by local artisanal and recreational fishermen we report the presence of S. maculatus in several locations of the Merin Lagoon and São Gonçalo channel basin. This represents an important change in the distribution range of the species, previously restricted to the Patos Lagoon basin. Using species distribution models we found a high favourability and risk of expansion of S. maculatus population in the Merin Lagoon basin. In addition, the natural environment of the lagoon, i.e., lentic and vegetated waters, and low diversity of natural predators are favourable conditions for piranha proliferation. Due to their top predator role, piranhas are capable to disrupting food webs and biodiversity, as well as negatively impacting fisheries and recreational activities. Our results highlight the need to implement control actions and the monitoring of piranha populations and the whole ecosystem to elaborate appropriate mitigation measures.

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梅林潟湖盆地外来食人鱼（特征，食人鱼科）的新记录及其入侵风险

斑纹水虎鱼（特征，水虎鱼科）是一种原产于Río de la Plata和亚马逊盆地的水虎鱼。最近，它被记录在帕托斯泻湖盆地。帕托斯泻湖和梅林泻湖由 o gonalalo河道连接。根据当地手工渔民和休闲渔民提供的信息，我们报告了在梅林泻湖和s o gon拉萨洛海峡盆地的几个地点存在斑纹S. maculatus。这代表了该物种分布范围的一个重要变化，以前仅限于帕托斯泻湖盆地。利用物种分布模型，我们发现斑纹刺槐种群在梅林泻湖流域的扩张具有较高的有利度和风险。此外，泻湖的自然环境，即死水和植被水域，以及自然捕食者的低多样性是水虎鱼繁殖的有利条件。由于它们的顶级捕食者角色，食人鱼能够破坏食物网和生物多样性，并对渔业和娱乐活动产生负面影响。我们的结果强调需要实施控制行动和监测食人鱼种群和整个生态系统，以制定适当的缓解措施。

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来源期刊

Austral Ecology 环境科学-生态学

CiteScore

2.90

自引率

6.70%

发文量

117

审稿时长

12-24 weeks

期刊介绍： Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.