Fish communities and migrations in the vicinity of fishways in a regulated river (Enz, Baden-Württemberg, Germany)

Jansen, Wolfgang; Kappus, B.; Böhmer, Jürgen; Beiter, Thomas

doi:10.1016/s0075-9511(99)80050-4

Cited by 21 publications

(15 citation statements)

References 8 publications

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“…These results contrast with reports from other fishways in which chub and roach have been observed successfully ascending at a higher efficiency than perch (Lucas et al 1999a;Knaepkens et al 2005). Furthermore, tench are rarely observed using fishways (Prignon et al 1998;Jansen et al 1999), and they would not have been expected to have a high efficiency, given their low critical swimming speed (Wolter & Arlinghaus 2003). 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.…”

Section: Discussionmentioning

confidence: 60%

“…Fishways can function as rearing and/or spawning habitat for different fish species as has been previously suggested for species like bullhead (Cottus gobio L.), burbot, chub, grayling (Thymallus thymallus L.), European eel, roach, trout, salmon and signal crayfish (Pacifastacus leniusculus) (Jungwirth 1996;Eberstaller et al 1998;Jansen et al 1999;Degerman 2001;Slavik & Bartos 2002;Knaepkens et al 2005). In our study, we documented relatively long-term use of the fishways, presumably as rearing habitats, for several species, but it is not known whether any of the species spawn inside the fishways.…”

Section: Discussionmentioning

confidence: 98%

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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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Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 98%

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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“…For example, its critical swimming speed (U crit ) only varies between 0AE15-0AE34 m s )1 (Pavlov 1989). For example, previous studies suggested that fish passes such as by-pass channels may be used as habitat by this benthic species (although the effectiveness of these constructions as a fish pass facility for the bullhead remained unclear because of methodological constraints like ineffective capture techniques or limited sample sizes ;Jungwirth 1996;Jansen et al 1999). Consequently, it is tempting to suggest that supercritical water velocities in O6 (and O7) prevented free upstream passage of this benthic species.…”

Section: Fish Pass Effectiveness For Bullheadmentioning

confidence: 99%

Fish pass effectiveness for bullhead (Cottus gobio), perch (Perca fluviatilis) and roach (Rutilus rutilus) in a regulated lowland river

Knaepkens¹,

Baekelandt²,

Eens³

2005

Ecology of Freshwater Fish

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Fish pass effectiveness for bullhead (Cottus gobio), perch (Perca fluviatilis) and roach (Rutilus rutilus) in a regulated lowland river Un resumen en españ ol se incluye detrás del texto principal de este artículo.Abstract -The effectiveness of a pool-and-weir fish pass in the regulated river Laarse Beek (Belgium) was assessed for bullhead (Cottus gobio), perch (Perca fluviatilis) and roach (Rutilus rutilus) from August 2002 to April 2003. Fish were caught by electrofishing downstream, within and upstream of the fish pass. They were marked with visible implant elastomer tags and released downstream of the fish pass. Our results suggest that the fish pass is ineffective for the bullhead because none of the 1270 tagged bullheads were recaptured in the upstream study area. Passage failure most likely resulted from excessive water velocities in the fish pass. On the contrary, 8% of the tagged perch and 29% of the tagged roach were recaptured in the upstream study area. Several management strategies are proposed to allow free upstream passage of the endangered bullhead at the fish pass under study.

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“…Instream barriers that are constructed along rivers, such as causeways, weirs and dams/impoundments, contribute to the general disturbance of the typical longitudinal nature of river systems (Jansen et al, 1999) and impede the passage of migrating fish species (Meixler et al, 2009). Globally the fragmentation of rivers has been identified as the primary driver of population decline for many migratory fishes (Masters et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

The effects of instream barriers on the distribution of migratory marine-spawned fishes in the lower reaches of the Sundays River, South Africa

Wasserman¹,

Weyl²,

Strydom³

2011

WSA

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The distribution and abundance of migratory marine-spawned fish species was investigated in the lower reaches of the warm temperate Sundays River, Eastern Cape, South Africa. Fish were collected above and below manmade instream barriers using multi-meshed gill net fleets, 12 mm mesh fyke nets and 1 mm mesh fyke nets. Sampling was undertaken twice in the winter and twice in the summer of 2009. Of the 2 764 fish caught, marine-spawned species contributed 42.3%. Freshwater mullet Myxus capensis and Cape moony Monodactylus falciformis were the dominant marine-spawned species at most sites and were capable of surmounting almost all instream barriers. The longitudinal distribution of these species did, however, vary by size class, with the largest individuals being recorded the furthest upstream. The longfin eel Anguilla mossambica was the only species sampled above all instream barriers, including the 4 m high Cleveland Weir. The giant mottled eel Anguilla marmorata was found in low numbers at sites closer to the estuary headwaters. Other marine-spawned species, including Liza tricuspidens and Mugil cephalus (Mugilidae), Argyrosomus japonicus (Sciaenidae), Lithognathus lithognathus and Rhabdosargus holubi (Sparidae), were sampled in low numbers from the site directly below the first instream barrier only, suggesting that this first barrier restricted the access of these species to upstream environments. Freshwater non-native fishes contributed 41.7% to the total catch by numbers. The potential impact of the non-native species as predators and competitors on marine-spawned species in the study area is discussed.

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Fish communities and migrations in the vicinity of fishways in a regulated river (Enz, Baden-Württemberg, Germany)

Cited by 21 publications

References 8 publications

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

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

Fish pass effectiveness for bullhead (Cottus gobio), perch (Perca fluviatilis) and roach (Rutilus rutilus) in a regulated lowland river

The effects of instream barriers on the distribution of migratory marine-spawned fishes in the lower reaches of the Sundays River, South Africa

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