非本地鲑鱼的摄食性能优于巴塔哥尼亚本地鱼类

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Pablo Ezequiel Reggi, María Gabriela Otturi, Miguel Ángel Battini, Juan Pablo Barriga
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引用次数: 0

摘要

我们的目标是评估原生鲈鱼(Percichthys trucha)与鲑鱼(Salmo trutta)和鳟鱼(Oncorhynchus mykiss)在幼鱼期相互作用的影响。我们以Meridialaris chiloeensis为原生猎物,进行了单一和多捕食者(同种和异种)功能反应(FR)实验,并估算了功能反应比作为捕食者影响指标。我们的结果表明,所有物种都具有第二类功能反应比,其中鲑科鱼类对猎物的影响大于本地鱼类。在多捕食者实验中,O. mykiss 对 P. trucha 的负面影响大于 S. trutta。在同种条件下,松露鲈的个体摄食性能要优于异种条件下。这项研究表明,在巴塔哥尼亚地段环境中,松露鲑幼鱼易受鲑鱼竞争的影响,这可能是一个真正的威胁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Feeding performance superiority of non-native salmonids over a native Patagonian fish

Feeding performance superiority of non-native salmonids over a native Patagonian fish

Our objective was to assess the effects of interactions between the native Percichthys trucha and both Salmo trutta and Oncorhynchus mykiss during the juvenile period. We conducted single and multipredator (conspecific and heterospecific) functional response (FR) experiments with Meridialaris chiloeensis as native prey and estimated the functional response ratio as a predator impact metric. Our results showed that all species have type II FR, with salmonids having a greater impact on prey than native fish. In multipredator experiments, O. mykiss had a greater negative impact on P. trucha than S. trutta. The individual feeding performance of P. trucha was better under conspecific than heterospecific conditions. This study shows that the vulnerability of juvenile P. trucha to salmonid competition could be a real threat in Patagonian lotic environments.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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