Ichthyoplankton drift through fishway in large dam: effect of hydrology, seasonal patterns and larvae condition

Silva, Patrícia Sarai da; Celestino, Leandro Fernandes; Assumpção, Lucileine de; Makrakis, Sérgio; Dias, João Henrique Pinheiro; Kashiwaqui, Elaine Antoniassi Luiz; Makrakis, Maristela Cavicchioli

doi:10.1080/24705357.2020.1762128

Cited by 7 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because the fish species targeted in both the US and Japan are relatively capable swimmers, the present ice-harbor and stair-type fishways are sufficient. For these species, conduit-type fishways, which involve relatively high flows regardless of their design specifics, are often selected and installed at the sides of dams [7,26,27,[78][79][80][81][82].…”

Section: Effects Of the Rock-ramp Fishwaymentioning

confidence: 99%

“…Dams and other human-made barriers create obstacles in aquatic ecosystems by altering habitats and fragmenting the lotic system [6]. Restoring continuity is therefore particularly important for rivers disrupted by dams [4,[7][8][9][10][11][12]. Fishways have been developed for this purpose [4,[13][14][15][16][17][18], and the effects of fishways on large varieties of fish have been tested vis adaptive management based on biological, hydraulic, and other physical parameters [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Further, measures to attract fish to the fishways are being studied [23]. The main targets of such studies have been anadromous salmonids, such as the chum salmon Oncorhynchus keta, brown trout Salmo trutta, Chinook salmon Oncorhynchus tshawytscha, and rainbow trout Oncorhynchus mykiss [24,25] because these species are globally important as aquatic products [7]. However, the conservation of endangered fish species is also important [8], and freshwater fish, such as Plecoglossus altivelis, Tribolodon hakonensis, and Cottus pollux, are also valuable species in the fishing industry as equivalents to the anadromous salmonids in Japan.…”

Section: Introductionmentioning

confidence: 99%

“…Another feature is that many normal fishways do not have riverbed material at the bottom. However, riverbed materials are essential for bottom-dwelling fish species and other benthic organisms [7,[42][43][44][45][46]. Thus, installing other types of fishways with gentle slopes and riverbed materials is crucial for preserving the biodiversity of the river channel [3,10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Masumoto

Nakai²,

Asaeda

et al. 2022

Water

View full text Add to dashboard Cite

The migration of fish is influenced by the unique environmental characteristics of the destination and migratory habitat preferences. There are three fishways in Miyanaka Intake Dam. The rock-ramp fishway was newly established in 2012, creating an environment with different flow velocities and water depths. The purpose of this study was to investigate the effectiveness of the new rock-ramp fishway for native fish through two surveys. In the first survey, traps were installed during the survey period in all three fishways and all fish were caught. The run-up environment was quantified by measuring the flow velocity. In the second survey, fish were caught by spectrum methods upstream and downstream from the dam. It was found that bottom-dwelling fish and swimming fish not bound to the bottom with low migration abilities used the rock-ramp fishway for migration and as a habitat. After the new rock-ramp fishway was built, catches increased upstream from the dam. Further, the rock-ramp fishway is a potential habitat for certain species, such as Cottus pollux. As this is the first study to demonstrate the effectiveness of rock-ramp fishways, the research results are expected to be valuable to fishery managers and those planning river engineering projects.

show abstract

Section: Effects Of the Rock-ramp Fishwaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Masumoto

Nakai²,

Asaeda

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…In South American rivers, the first studies on ichthyoplankton transport were carried out in the Solimões and Amazonas rivers (Araujo‐Lima & Oliveira, 1998), and in the Paraná River (Baumgartner et al, 2004; Bialetzki et al, 1999). Currently, studies evaluating fish reproduction behaviour and dynamics have been conducted in several river basins with a focus on assessing the ichthyoplankton drift pattern related to the impact of hydroelectric plants (Barthem et al, 2014; Brambilla et al, 2020; Da Silva et al, 2020; Fuentes et al, 2016; Garcia et al, 2018; Mounic‐Silva et al, 2019; Suzuki et al, 2013). And the free‐flowing rivers, especially dam‐free tributaries, has been an appeal for the conservation of fish species (Da Silva et al, 2015, 2019; Makrakis et al, 2019; Marques et al, 2018; Silva et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Importance of a turbulent river section below a giant waterfall for fish spawning: Indications from drift and dispersion patterns of early life stages

et al. 2021

Self Cite

View full text Add to dashboard Cite

Seasonal drift patterns of fish eggs and larvae were analysed along the river section downstream the Iguaçu River Falls to the confluence with Paraná River, over three spawning seasons. This river section is situated in a narrow rocky canyon characterized by a steep slope, which leads to highly turbulent and fast flowing conditions in a series of rapids. Water transit time in this river stretch of 20 km was short (5–11 h), the flow‐velocity in rapids can reach values of more than 6 m s−1. Densities of drifting eggs and larvae varied between three spawning seasons, and differences of eggs were more pronounced compared to larvae. Eggs and larvae were observed all along the river section. A spatial, longitudinal distribution pattern of larvae was found, with higher numbers in the upper section. A distinct spatial sequence of different embryonic stages was observed, with the highest abundance of early stages. Larval densities were low in comparison to egg densities, and preflexion and flexion stages predominated. High abundance of buoyant eggs in drift indicates fish spawning in rapid and turbulent waters of the Iguaçu River, particularly downstream from the Iguaçu Falls. Rainfall and turbidity may be the main trigger for spawning. Spawned eggs drifted quickly towards the confluence, most are likely to hatch in the Paraná River, while larvae disperse to nursery habitats even in the river section below the falls. Thus, inshore zones along the whole stretch provide nursery habitats for larval development of fish species exhibiting different reproductive strategies.

show abstract

Preferential behavior of Tribolodon hakonensis for fishways according to biological characteristics

Masumoto

Nakai²,

Asaeda

et al. 2023

River Research & Apps

View full text Add to dashboard Cite

In 2012, the fishway in the Miyanaka Intake Dam in Niigata Prefecture, Japan, was reconstructed and divided into three fishways (ice‐harbor‐, stair‐, and rock‐ramp‐type) with different flow velocities and water depths. We conducted an adaptive monitoring survey in these fishways from 2012 to 2020, and 33 fish types were found, including migratory, swimming, small swimming, and benthic fishes. Many species displayed a preference for specific fishways. The run‐up for Tribolodon hakonensis was studied to determine the effects of physical parameters such as body length, rush speed for instantaneous swimming, water temperature, and presence/absence of nuptial coloration on fishway preference. T. hakonensis with nuptial coloration had greater body length and higher rush speeds than those without it. They also preferred the ice‐harbor fishway, whereas their shorter, uncolored counterparts preferred the stair and rock‐ramp alternatives. The environmental conditions selected by T. hakonensis changed according to their growth stage, as did fishway preference. Changes in fishway environmental conditions may have influenced the observed differences in fishway populations. It was thus confirmed that developing fishways with different flow velocities and water depths is effective in supporting the various life stages of T. hakonensis.

show abstract

Ichthyoplankton drift through fishway in large dam: effect of hydrology, seasonal patterns and larvae condition

Cited by 7 publications

References 43 publications

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways

Importance of a turbulent river section below a giant waterfall for fish spawning: Indications from drift and dispersion patterns of early life stages

Preferential behavior of Tribolodon hakonensis for fishways according to biological characteristics

Contact Info

Product

Resources

About