What do fish do after passing through a fishway? A radio-telemetry study on patrimonial holobiotic species

IF 1.6 3区 农林科学 Q3 FISHERIES
Justine Gelder, Jean-Philippe Benitez, Michaël Ovidio
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引用次数: 0

Abstract

The restoration of longitudinal connectivity in rivers allows fish to colonise new habitats. However, there is a lack of information regarding the behaviour of fish when they colonise the newly opened river stretch. We used manual radiotelemetry to tracked individuals belonging to four species (trout, nase, grayling and barbel) after their release upstream of two obstacles in the Amblève River. We observed a diversity of movement behaviours and habitats used among the studied species. All the species used potential spawning habitats with distances travelled upstream reaching 2.4 km for the grayling, 7.0 km for the barbel, 16.9 km for the nase and 18.0 km for the trout, which also use tributaries and sub-tributaries of the Amblève River. Post-reproduction downstream behaviours were observed in all species, but this was made difficult by the absence of downstream migration devices at dams that forced fish to seek alternative habitats. Our study suggested that allowing fish to move upstream with fishways is beneficial as the species succeeded in reaching spawning grounds, but a holistic approach combined with the installations of devices or an opening of gates to allow post-reproduction downstream migrations would allow them to completely accomplish their biological cycle.

鱼类通过鱼道后会做什么?对祖先全生物物种的无线电遥测研究
恢复河流的纵向连通性可以让鱼类在新的栖息地定居。然而,有关鱼类在新开辟的河段定居时的行为的信息却很缺乏。我们在安布雷夫河的两个障碍物上游使用人工无线电遥测技术追踪了放流后的四种鱼类(鳟鱼、鳢、灰鳞鱼和鲃)。我们观察到研究物种的运动行为和栖息地多种多样。所有鱼种都使用了潜在的产卵栖息地,灰口鲈的上游距离为2.4千米,鲃为7.0千米,鲶为16.9千米,鳟为18.0千米,它们还使用了安布雷夫河的支流和支流。所有物种都有繁殖后的顺流而下行为,但由于水坝上没有顺流而下的洄游装置,鱼类不得不寻找其他栖息地,这使得顺流而下变得十分困难。我们的研究表明,通过鱼道让鱼类逆流而上是有益的,因为鱼类可以成功到达产卵地,但如果采取综合方法,结合安装装置或打开闸门,让鱼类在繁殖后顺流而下,就能让它们完全完成其生物周期。
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来源期刊
Ecology of Freshwater Fish
Ecology of Freshwater Fish 农林科学-海洋与淡水生物学
CiteScore
4.10
自引率
0.00%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.
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