Angling bait consumption and stable isotope niche of two cyprinids in different lake fisheries

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-04-13 DOI:10.1111/fwb.14248

Alexis Imbert, Jean-Nicolas Beisel, Stéphanie Boulêtreau, Julien Cucherousset

引用次数: 0

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不同湖泊渔业中两种青鱼的垂钓饵料消耗量和稳定同位素生态位

陆地补贴对淡水生态系统非常重要，在支持休闲渔业的湖泊中，垂钓鱼饵可能是一种重要的异源输入。这种资源可直接成为鱼类的食物，但其消耗量可能会受到鱼体大小和不同渔业使用的垂钓饵料类型的影响。在这项研究中，我们评估了两种常见鲤科鱼类（鲤鱼和鲫鱼）在三种渔业类型（鲤鱼专捕、鳊鱼专捕和放养渔业）中对垂钓饵料的消耗情况。我们使用稳定同位素（δ13C 和 δ15N）分析了法国西南部 16 个砾坑湖中的鲤科鱼类、其天然猎物和不同垂钓饵料，其中包括 4 个没有垂钓的湖泊。与天然猎物相比，垂钓饵料明显富集δ13C，贫化δ15N。总体而言，垂钓饵料的消耗量在个体之间存在很大差异。对鲤鱼而言，垂钓饵料消耗量平均为30.5%（±17.0 SD），在专门捕捞鲤鱼的渔场（40.0%±16.7 SD）高于放养渔场（15.9%±9.0 SD），且与体型无关。对于鲤鱼，垂钓饵料消耗量平均为41.3%（±15.7 SD），不同渔业类型之间无显著差异，但随体型的增加而增加。在专门的鲤鱼渔业中，鲤鱼的生态位宽度是无垂钓湖泊的六倍。就胭脂鱼而言，与不垂钓的湖泊和专门捕捞蟑螂的湖泊相比，专门捕捞鲤鱼和投放-捕捞的湖泊的生态位宽度要大两倍。这些结果表明，垂钓饵料补贴为垂钓湖泊中的鱼类提供了一个新的、大量的资源机会，并通过增加目标物种的稳定同位素生态位大小对其产生营养后果。这些影响在一定程度上受到垂钓者使用的垂钓饵料类型和渔业特征的影响，这表明有必要改进对这类补贴的时间动态的量化，以更好地了解其对淡水鱼类和受援生态系统的影响。

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.