气候变化领域集成服务门户(CCPortal): Downstream passage performance of silver eel at an angled rack: effects of behavior and morphology

CCPortal

DOI	10.1007/s10750-024-05530-5
	Downstream passage performance of silver eel at an angled rack: effects of behavior and morphology
	Motyka, Roman; Watz, Johan; Aldven, David; Carlsson, Niclas; Eissenhauer, Felix; Harbicht, Andrew; Karathanou, Eirini; Knieps, Tobias; Lind, Lovisa; Calles, Olle
发表日期	2024
ISSN	0018-8158
EISSN	1573-5117
英文摘要	The European eel is critically endangered due to heavy impact of anthropogenic factors, such as habitat fragmentation, overexploitation and climate change. During downstream migration, silver eels may encounter hydropower plants, which often result in delay or mortality from impingement on trash-racks or turbine passage. These problems can be mitigated with downstream passage solutions, such as angled racks that guide downstream-migrating eels to safe passage routes. The importance of bar spacing and phenotypic diversity for passage performance is, however, largely unknown. In this study, we investigated how morphological parameters (body mass, eye and fin indices) and behavioral score (open field test) influenced passage rate at an experimental intake equipped with a bypass and angled racks with either 15 or 30 mm bar spacing. Both racks were efficient in guiding eels into a bypass. There was a strong positive effect of body mass and a weak positive effect of open field test score on passage rate. Other factors such as eye and fin indices played a minor role. These results demonstrate the performance of angled racks with bypasses and form a useful starting point for further research regarding the relationships between individual variation in behavior, morphology and passage solutions for silver eels.
英文关键词	Anguilla; Downstream migration; Fish guidance; Fish passage; Morphometry; Open field test
语种	英语
WOS研究方向	Marine & Freshwater Biology
WOS类目	Marine & Freshwater Biology
WOS记录号	WOS:001201476600001
来源期刊	HYDROBIOLOGIA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295164
作者单位	Karlstad University; Vattenfall; Fisheries & Oceans Canada
推荐引用方式 GB/T 7714	Motyka, Roman,Watz, Johan,Aldven, David,et al. Downstream passage performance of silver eel at an angled rack: effects of behavior and morphology[J],2024.
APA	Motyka, Roman.,Watz, Johan.,Aldven, David.,Carlsson, Niclas.,Eissenhauer, Felix.,...&Calles, Olle.(2024).Downstream passage performance of silver eel at an angled rack: effects of behavior and morphology.HYDROBIOLOGIA.
MLA	Motyka, Roman,et al."Downstream passage performance of silver eel at an angled rack: effects of behavior and morphology".HYDROBIOLOGIA (2024).