A comprehensive assessment of the failure of<i>Barbus barbus</i>spawning migrations through a fish pass in the canalized River Meuse (Belgium)

Baras, Étienne; Lambert, H; Philippart, Jean-Claude

doi:10.1051/alr:1994020

Cited by 66 publications

(47 citation statements)

References 13 publications

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“…In addition, both species tended to avoid high flow conditions Horký et al 2007a) during this period. Controversially, high flow conditions induced occurrence of barbel in a fish ladder (Baras et al 1994) that corresponds with our results showing an increase in number of barbel in a fish ladder according to increasing flow. The barbel is a rheophilous species with a body morphologically adapted to higher velocities, hence changes in flow conditions can induce a shift in its position within a stream.…”

Section: Discussionsupporting

confidence: 90%

Occurrence of cyprinids in fish ladders in relation to flow

2009

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To analyse the relationship between spawning migrations and flow, cyprinids from ten fish ladders of the Elbe River (Czech Republic) were collected during the period of spawning migrations (April -June) in 1996, 2000 and 2001. Number of species and individuals in the fish ladders increased with increasing flow up to medium values, followed by further decrease during high flows, whilst length of individuals increased with increasing flow. Moreover, occurrence of four the most numerous species (bleak, roach, silver bream and barbel) showed species specific differences in response to flow variability. In early spring, the highest number of bleak in fish ladders occurred during the low flow, whilst later increased with increasing flow. Occurrence of roach and silver bream achieved the maximum during the medium flow values across the whole studied period. In opposite, occurrence of barbel increased with increasing flows during the whole period. Furthermore, it can be assumed that occurrence of fish in ladders was associated not only with spawning migrations but also reflected shifts in local fish distribution in response to flow variability in the main channel.

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Section: Discussionsupporting

confidence: 90%

Occurrence of cyprinids in fish ladders in relation to flow

2009

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“…The effects of delay can be diffuse, but may include arriving at spawning grounds too late, missing the window of physiological readiness, reduced spawning success and elevated risks of pre-and post-spawning mortality (Shikhshabekov, 1971;Baras et al, 1994;Jonsson et al, 1997;Cowx and Welcomme, 1998;Chanseau et al, 1999). Studies show that increased energy expenditures as small as 10% can have a detrimental effect on post-spawner survival (Jonsson et al, 1997), which emphasizes the need to incorporate the effects of delay into evaluations of fishway function (Lundqvist et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Connectivity is a two‐way street—the need for a holistic approach to fish passage problems in regulated rivers

Calles

Greenberg

2009

River Research & Apps

149

103

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We evaluated the effects of a rehabilitation project, whose goal was to re-establish longitudinal connectivity for anadromous trout in the regulated river Emån. We used a holistic approach, by tagging and following both upstream-migrating spawners (N ¼ 348) and downstream-migrating smolts (N ¼ 80) and kelts as they passed two hydroelectric plants (HEP 2-3) with naturelike fishways.When migrating upstream, 84-88% of the spawners stopped, primarily at spawning grounds, before reaching HEP2. The proportion of stoppers was lower (56%) for fish that had been to the fishways in previous years, indicating that the recolonization rate is likely to increase over time. Of the spawners that approached the fishway at HEP2, 77% rapidly located the fishway situated next to the tail-race, resulting in an attraction efficiency of 81% and a passage efficiency of 95%. The time required to locate the fishway inside the former channel at HEP3 was substantial, but the attraction efficiency (89%) and passage efficiency (97%) were nevertheless high.The kelts swam downstream mainly in spring, using spill gates and the fishways, to swim past HEP2 and 3 and continue downstream to the Baltic Sea. Iteroparity was confirmed by the fact that 20% of the spawners were tagged in previous years. Smolt loss was about 30% for both HEPs, with a higher turbine-induced loss 30% for fish passing through Francis runners than a Kaplan runner. Fifteen per cent of the tagged smolt reached the sea and none of these fish had swum through the Francis runners.It will probably take many years before longitudinal connectivity is fully re-established in the river Emån, due to substantial losses of both upstream-migrating spawners (35% loss) and downstream-migrating smolts (50%) and kelts. In addition, smolt production in areas upstream of HEP3 is far below carrying capacity. Thus, additional measures that not only facilitate movement of upstream spawners, but also reduce mortality and injuries of downstream migrants are urgently needed to create a self-sustaining fish population.

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“…Both burbot and pike (Esox lucius L.) have been observed to ascend nature-like fishways, Denil-and vertical slot fishways (Schwalme et al 1985;Degerman 2001), but their low usage in the present study may be an effect of the low number of tagged fish. As a general rule, nature-like fishways are often passable for more species than technical fishways (Eberstaller et al 1998), but there are examples of technical fishways such as Denil fish passes that are passable for numerous species, including chub, bream (Abramis brama L.), bleak (Alburnus alburnus L.) and European eel (Anguilla anguilla L.) (Baras et al 1994). …”

Section: Discussionmentioning

confidence: 99%

The use of two nature-like fishways by some fish species in the Swedish River Em�n

Calles¹,

Greenberg²

2007

Ecol Freshwater Fish

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We studied the use of two nature-like fishways by 15 fish species (N ¼ 240) in the River Emån in southern Sweden. Use of the fishways for both passage and as a habitat was studied by electrofishing, trap catches and PIT telemetry. Of the 187 PIT-tagged fish, 52 individuals from 10 different species ascended one of the fishways for a total passage efficiency of 74%. For the five species that most frequently ascended the fishways, the passage efficiency was 100% for tench (Tinca tinca L.) and perch (Perca fluviatilis L.), 86% for chub (Leuciscus cephalus L.), 60% for burbot (Lota lota L.) and 50% for roach (Rutilus rutilus L.). Individuals that failed to pass the fishways were typically small cyprinids or species that were assumed to have taken up residence in the fishways, such as juvenile brown trout (Salmo trutta L.) and burbot. The nature-like fishways have re-established longitudinal connectivity for most of the studied species and also functioned as rearing and winter habitat for a number of species.

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A comprehensive assessment of the failure ofBarbus barbusspawning migrations through a fish pass in the canalized River Meuse (Belgium)

Cited by 66 publications

References 13 publications

Occurrence of cyprinids in fish ladders in relation to flow

Occurrence of cyprinids in fish ladders in relation to flow

Connectivity is a two‐way street—the need for a holistic approach to fish passage problems in regulated rivers

The use of two nature-like fishways by some fish species in the Swedish River Em�n

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