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Response of upstream migrating juvenile European eel (Anguilla anguilla) to electric fields: Application of the marginal gains concept to fish screening

Miller, Mhairi ; Sharkh, Suleiman M ; Kemp, Paul S Bryhn, Andreas C.

PloS one, 2022-06, Vol.17 (6), p.e0270573-e0270573 [同儕審閱期刊]

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題名:
Response of upstream migrating juvenile European eel (Anguilla anguilla) to electric fields: Application of the marginal gains concept to fish screening
著者: Miller, Mhairi ; Sharkh, Suleiman M ; Kemp, Paul S
Bryhn, Andreas C.
主題: Acoustics ; Adults ; Anguilla anguilla ; Animal migration ; Avoidance ; Avoidance behavior ; Biology and Life Sciences ; Direct current ; Downstream ; Earth Sciences ; Ecology and Environmental Sciences ; Eels ; Electric field strength ; Electric fields ; Electricity ; Electrodes ; Environmental impact ; Evaluation ; Fish ; Fish industry ; Fisheries ; Fishing ; Fishways ; Infrastructure ; Management ; Mitigation ; Mortality ; Physical Sciences ; Prototypes ; Rivers ; Route selection ; Social Sciences ; Upstream ; Water intakes
所屬期刊: PloS one, 2022-06, Vol.17 (6), p.e0270573-e0270573
描述: The decline in European eel ( Anguilla anguilla ) recruitment over the past half-century is partly due to river infrastructure that delays or blocks upstream migration to rearing habitat. Stimuli, such as electricity, can be used to modify the behaviour of downstream moving fish and guide them to preferred routes of passage at river infrastructure; but research on upstream migrating juvenile eel remains limited. The response of upstream migrating juvenile eel exposed to pulsed direct current (PDC) electric fields was investigated using a recirculatory flume. Eel were presented a choice of two routes upstream under either: (1) a treatment condition, in which the selection of one route resulted in exposure to High Electric Field (HEF) strength that was between 1.5–2 times stronger than the Low Electric Field (LEF) strength encountered in the alternative route; or (2) a control in which the electric field was absent in both routes. Under the treatment, five different mean HEF strengths (0.53, 0.77, 1.22, 2.17 and 3.74 Vcm -1 ) were tested at one of two frequencies (2 and 10 Hz). Route choice, distance downstream of the first set of electrodes at which an initial response was observed and avoidance behaviours ( acceleration , retraction , switching and rejection ) were compared among treatments. For the 1.22, 2.17 and 3.74 Vcm -1 and under 2 Hz, eel preferred to pass the LEF route. Avoidance was greater in the HEF route and positively related to field strength. The distance of the initial response did not differ between routes, field strengths or frequency. Upstream migrating eel avoided electric fields indicating potential to develop this approach for fish guidance. Further work is needed to test prototypes in field settings, particularly in combination with traditional physical screens to water intakes as part of a process of applying the concept of marginal gains to advance environmental impact mitigation technology.
出版者: San Francisco: Public Library of Science
語言: 英文
識別號: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0270573
PMID: 35771848
資源來源: Publicly Available Content Database
Academic Search Premier
DOAJ Directory of Open Access Journals
Agricultural & Environmental Science Collection

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Response of upstream migrating juvenile European eel (Anguilla anguilla) to electric fields: Application of the marginal gains concept to fish screening

Miller, Mhairi ; Sharkh, Suleiman M ; Kemp, Paul S Bryhn, Andreas C.

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