Variation in Diet Patterns of the Invasive Top Predator Sander lucioperca (Linnaeus, 1758) across Portuguese Basins
Variation in Diet Patterns of the Invasive Top Predator Sander lucioperca (Linnaeus, 1758) across Portuguese Basins
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葡萄牙盆地入侵性顶级捕食者 Sander lucioperca（Linnaeus，1758）饮食模式的变化
DOI：
10.3390/w13152053
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发表时间：
2021
期刊：
影响因子：
3.4
通讯作者：
F. Ribeiro
中科院分区：
文献类型：
--
作者：
Diogo Ribeiro;C. Gkenas;J. Gago;F. Ribeiro
非本土物种的引入被认为是对生物多样性的重大威胁，特别是在淡水生态系统中。Pikeperch Sander Luciopca是葡萄牙最近的入侵者，主要提供商业和垂钓利益。这项工作的目的是研究这种顶级捕食者在葡萄牙盆地的饮食，并评估其对接受者生态系统的潜在影响。总共检查了7个盆地的256个梭鱼胃，其中88个(n=34%)是空的。在北方种群中，梭子鱼的食性主要由R.rutilus、M.salmoides和双翅目组成，而在较潮湿的高原地区，A.alburnus、P.clarkii和Atyidae是重要的猎物。饮食的变化与纬度和个体发育关系最密切，两种体型的个体都显示出自相残杀的迹象。种群生态位宽度仍然很低，并伴随着较高的个体饮食专业化，特别是在北方种群。梭鱼的饮食模式表示在每个生态系统中使用当地丰富的猎物的机会主义能力，并且是大小相关的，较大的个体变得更多食鱼者，在生态系统中造成更高的影响。这个关于梭鱼饮食的第一个视角展示了这种非本土捕食者在葡萄牙各地的食性特征，这对于加深我们对这些引入的食鱼者的影响的了解非常重要。
The introduction of non-native species is recognized as a major threat to biodiversity, particularly in freshwater ecosystems. Pikeperch Sander lucioperca, is a recent invader to Portugal, primarily providing commercial and angling interest. The aim of this work was to study the diet of this top predator across Portuguese basins and to evaluate its potential impact on recipient ecosystems. In total, 256 pikeperch stomachs from seven basins were examined, of which 88 (n = 34%) were empty. Pikeperch diet was dominated by R. rutilus, M. salmoides and Diptera in northern populations, while A. alburnus, P. clarkii and Atyidae were important prey in more humid highlands. Variation in diet was most strongly linked to latitude and ontogeny, with both size classes showing signs of cannibalism. The population niche breadth remained low and was accompanied by higher individual diet specialization, particularly in northern populations. Pikeperch dietary patterns denoted an opportunistic ability to use locally abundant prey in each ecosystem, and was size dependent, with larger individuals becoming more piscivores, causing a higher impact in the lotic systems. This first perspective about the pikeperch diet presents a very broad view of the feeding traits of this non-native predator across Portugal, being very important to deepen our knowledge about the impact of these introduced piscivores.
影响因子：
8.5
作者：
C. V. van Rees;K. Waylen;A. Schmidt‐Kloiber;S. Thackeray;Gregor Kalinkat;K. Martens;S. Domisch;A. Lillebø;V. Hermoso;H. Grossart;R. Schinegger;K. Decleer;T. Adriaens;L. Denys;I. Jarić;J. Janse;M. Monaghan;Aaike De Wever;I. Geijzendorffer;M. Adamescu;S. Jähnig
通讯作者：
C. V. van Rees;K. Waylen;A. Schmidt‐Kloiber;S. Thackeray;Gregor Kalinkat;K. Martens;S. Domisch;A. Lillebø;V. Hermoso;H. Grossart;R. Schinegger;K. Decleer;T. Adriaens;L. Denys;I. Jarić;J. Janse;M. Monaghan;Aaike De Wever;I. Geijzendorffer;M. Adamescu;S. Jähnig