Fishways : Biological Basis, Limits and Legal Considerations

Porcher, Jean; Travade, F.

doi:10.1051/kmae/2002110

Cited by 30 publications

(29 citation statements)

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“…Unlike the species that utilized the fishway, these species lack the motivation to use the fishway; their usage therefore was not confirmed. The main biological aim of installing a fishway is to enable movement of anadromous and potamodromous fish to their spawning grounds and to help freshwater fish downstream of the weir move upstream (and vice versa), preventing isolation between the two areas [20]. Genetic differences between upstream and downstream species, due to long-term isolation resulting from a structure constructed across the river, have been reported [21].…”

Section: Discussionmentioning

confidence: 99%

An Efficiency Analysis of a Nature-Like Fishway for Freshwater Fish Ascending a Large Korean River

Kim

Yoon

Baek

et al. 2015

Water

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Using traps and passive integrated transponder (PIT) telemetry, we investigated the effectiveness of the nature-like fishway installed at Sangju Weir on the Nakdong River, Korea. In 11 regular checks over the study period, 1474 individuals classified into 19 species belonging to 5 families were collected by the traps, representing 66% of the species inhabiting the main channel of the Nakdong River. PIT tags were applied to 1615 individuals belonging to 22 species, revealing fishway attraction and passing rates of 20.7% and 14.5%, respectively. Interspecific differences were also shown. For 63.2% of fishes, it took more than a day to pass through the fishway. Some individuals spent a longer time (>28 days) inside the fishway, suggesting the fishway was also being used for purposes other than passage. In this study, we verified species diversity of fish using a nature-like fishway installed in a large river in Korea. The results of this study provide a useful contribution to the development of fishways suitable for fish species endemic to Korea and for non-salmonid fish species worldwide.

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Section: Discussionmentioning

confidence: 99%

An Efficiency Analysis of a Nature-Like Fishway for Freshwater Fish Ascending a Large Korean River

Kim

Yoon

Baek

et al. 2015

Water

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“…First, delayed migration will result in increased energetic expense, elevated predation risk, and may interrupt physiological transition that enables fish to enter the marine environment. Unfortunately, the impact of delayed migration on longterm survival is not always considered when evaluating fish guidance efficiency (Porcher & Travade, 2002). Second, the nature of the behavioural response exhibited is often variable.…”

Section: Discussionmentioning

confidence: 99%

Response of downstream migrant juvenile Pacific salmonids to accelerating flow and overhead cover

2008

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Mechanical structures designed to divert or guide juvenile migrant salmon at dams often work less effectively than expected. This likely results from a lack of understanding of fish behaviour. In order to address this, a series of experiments was conducted at McNary dam, USA, to assess the influence of hydraulic transition and overhead cover on the behaviour of seaward migrating juvenile Pacific salmon. Fish passing through a flume encountered a choice of route that varied based on hydraulic factors and overhead cover. Direct observation revealed that individuals elicited strong avoidance behaviour when they encountered areas where hydraulic conditions changed rapidly or were covered. Our findings have implications relevant to fish pass design and culvert restoration in Europe. Critically, improvement of current fish pass design and development of alternative mechanisms that effectively block fish access to, and divert fish away from poor passage routes, requires consideration of the behavioural component of fish migration.

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“…In cases where dams and other structures that can obstruct a river stretch have been constructed, these obstructions have been responsible for the decline of migratory species abundance (Agostinho et al, 2005), including the disappearance of entire stocks (salmon in the Rhine, Seine, and Garonne rivers, among others, in France) (Porcher & Travade, 2002). It is necessary to maintain free passage through all of the obstructions existing in a hydrographic basin.…”

Section: Discussionmentioning

confidence: 99%

The Canal da Piracema at Itaipu Dam as a fish pass system

et al. 2007

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The Canal da Piracema is the longest (nearly 10 km) fish pass system in the world. The construction of this fish pass was somehow controversial, because it connected two distinct ichthyofaunistic provinces. This study evaluated the ichthyofauna present in the Canal da Piracema and the abundance and distribution of long-distance migratory fish species along this fish pass system (evaluated possible selectivity). The Canal da Piracema was shown to be difficult to sample because of its environmental heterogeneity: artificial ponds, ladders and nature-like fish pass. To solve this problem, we used several fishing gears, adequate for the several biotopes present (unstructured and structured littoral were sampled with seining nets and electrofishing; lentic were sampled with gillnets and longlines (deeper areas); and rapid water areas were sampled with cast nets). The ichthyofauna of the Canal da Piracema followed the pattern for South America and the Paraná River, with a predominance of Characiformes and Siluriformes. The most representative families were Characidae, Anostomidae, Pimelodidae and Loricariidae. We captured 116 species (17 were long-distance migratory) during the period studied. Small-sized species were predominant in unstructured and structured littoral areas, especially Bryconamericus exodon and Apareiodon affinis. The most abundant species was Hypostomus spp. in lentic areas, followed by Iheringichthys labrosus. Hoplias aff. malabaricus predominated in deeper lentic areas. Long-distance migratory species were abundant in rapid waters; they were Prochilodus lineatus and Leporinus elongatus. The sharp reduction in the number of species, including migratory ones, is an indication that the Canal da Piracema is selecting the species that ascend it. Therefore, the search for information on the efficiency of the various fish passes present in the Canal da Piracema is fundamental, to facilitate upward movements of fish. If this is reached, this polemic fish pass has the potential to contribute to the conservation of fish stocks in Itaipu Reservoir and upstream stretches, because of the presence of spawning and development (nurseries) areas for migratory species.O Canal da Piracema é considerado o maior sistema de transposição para peixes no mundo, com 10 km de extensão. A sua construção foi controversa, pois viabilizou a conexão entre duas províncias ictiofaunísticas distintas. Este trabalho buscou avaliar a ictiofauna presente no Canal da Piracema, a abundância e distribuição das espécies migradoras de longa distância ao longo deste sistema de transposição (indicação de seletividade). O Canal da Piracema mostrou-se difícil de ser amostrado, devido a sua elevada heterogeneidade ambiental: lagos artificiais, escadas e canais semi-naturais, sendo utilizados diversos aparelhos de pesca, adequados aos diversos biótopos (litoral não estruturado e estruturado, amostrados com redes de arrasto e pesca elétrica; lêntico, amostrado com redes de espera e espinhel (mais profundo); e águas rápidas, amostradas com tarrafa...

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Fishways : Biological Basis, Limits and Legal Considerations

Cited by 30 publications

References 0 publications

An Efficiency Analysis of a Nature-Like Fishway for Freshwater Fish Ascending a Large Korean River

An Efficiency Analysis of a Nature-Like Fishway for Freshwater Fish Ascending a Large Korean River

Response of downstream migrant juvenile Pacific salmonids to accelerating flow and overhead cover

The Canal da Piracema at Itaipu Dam as a fish pass system

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