Impact of the Três Marias dam on the reproduction of the forage fish Astyanax bimaculatus and A. fasciatus from the São Francisco River, downstream from the dam, southeastern Brazil

Normando, Felipe Talin; Santiago, Kleber Biana; Gomes, Marcos Vinícius Teles; Rizzo, Elizete; Bazzoli, Nilo

doi:10.1007/s10641-013-0153-3

Cited by 29 publications

(26 citation statements)

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“…The canonical correlation shows that reproduction in males of matrinxã is less susceptible to environmental factors than that of females especially in site 1 due to the colder water from the hypolimnion released by the Três Marias Dam, as has also been reported for other important Neotropical migratory characiforms from the rio São Francisco such as curimatã-pacu Prochilodus argenteus (Sato et al, 2005;Arantes et al, 2011), piau-três-pintas Leporinus reinhardti (Weber et al, 2013) and dourado Salminus franciscanus . Recently, a similar tendency also was observed in a small-sized non-migratory characid named lambari-do-rabo-vermelho Astyanax fasciatus downstream from the Três Marias Dam (Normando et al, 2014).…”

Section: Discussionsupporting

confidence: 66%

“…This is due to colder water temperature for reproduction in site 1 (Arantes et al, 2011), since, immediately downstream from dams, the release of cold water is responsible for impaired fish reproductive activity (Olden & Naiman, 2010, Normando et al, 2014. Although the sex ratio of Neotropical fishes is usually 1:1 (Lowe-McConnell, 1987), the female to male ratio found for the matrinxã in site 2 was male biased-sex ratio.…”

Section: Discussionmentioning

confidence: 99%

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Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil

et al. 2015

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Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaeniaGünther, 1864 (Characiformes: Bryconidae) in southeastern Brazil , when compared with the site 1.In site 2 was registered the highest GSI means (9.97 ± 2.96 for females and 0.93 ± 0.52 for males), compared with the site 1 means. Reproduction period occurred from October to February. Unlike site 2, no spawned females or spent males were captured in site 1. Significant differences were found between females and males in site 2 (χ 2 = 26.84, df = 1, P < 0.05). Physical-chemical parameters of the water presented higher values in site 2. The canonical correlation test indicated that the reproduction of males is less susceptible to environmental factors than that of females. These results show that B. orthotaenia finds favourable conditions to reproduction just in site 2.Um total de 312 adultos de matrinxã foram capturados bimestralmente entre 2011-2012, em dois pontos do rio São Francisco: imediatamente a jusante da barragem de Três Marias (ponto 1) e na confluência com o rio Abaeté (ponto 2). Exemplares de Brycon orthotaenia do ponto 2 apresentaram maiores valores de comprimento total (32,24 ± 5,70 cm para fêmeas e 26,64 ± 3,79 cm para machos) e peso corporal (506,66 ± 332,17 g para fêmeas e 267,36 ± 145,84 g para machos) quando comparado com peixes do ponto 1. No ponto 2, foi registrado as maiores médias de IGS (9,97 ± 2,96 para fêmeas e 0,93 ± 0,52 para machos) em comparação com o ponto 1. O período reprodutivo ocorreu de outubro a fevereiro. Ao contrário do ponto 2, fêmeas desovadas e machos espermiados não foram capturados no ponto 1. Foram encontradas diferenças significativas entre fêmeas e machos no ponto 2 (χ 2 = 26,84, gl = 1, P < 0,05). Parâmetros físico-químicos da água apresentaram maiores valores no ponto 2. A análise de correlação canônica indicou que a reprodução de machos é menos susceptível a fatores ambientais do que de fêmeas. Estes resultados mostram que B. orthotaenia encontra condições favoráveis para a reprodução apenas no ponto 2.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil

et al. 2015

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“…the water temperature is lower in the deepest part, and it is this deeper water (hypolimnion) that is released from the hydroelectric plant (Sato, Bazzoli, Rizzo, Boschi, & Miranda, ). As a result of the thermal and hydrological changes that occur in the reservoir, this section of the São Francisco River immediately downstream of the dam is altered, harming the fish community (Normando, Santiago, Gomes, Rizzo, & Bazzoli, ). These negative impacts have also been detected immediately downstream of several hydroelectric dams on rivers around the world (Clarkson & Childs, ; Preece & Jones, ; Todd, Ryan, Nicol, & Bearlin, ).…”

Section: Introductionmentioning

confidence: 99%

Comparative analyses of reproductive activity inSchizodon knerii(Steindachner, 1875) (Characiformes: Anostomidae) in three sections of the São Francisco River basin

et al. 2017

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Summary This paper aims to establish possible changes in the main reproductive parameters of the so‐called piau‐branco, Schizodon knerii, in three sections of the São Francisco River basin. Fish (n = 388) were captured quarterly between May 2012 and April 2013 from three sections of the São Francisco River (SFR): section 1 = Três Marias Reservoir (TMR), a lentic environment; section 2 = SFR, the first 34 km downstream of TMR, a lotic environment in which the temperature, oxygen levels, and flow are not suitable for reproduction; section 3 = SFR, 34–54 km downstream from TMR after the confluence with the Abaeté River, a lotic environment in which temperature, oxygen levels and flow are suitable for reproduction. In section 2, females and males showed lower values of total length and body weight in relation to fish from sections 1 and 3. The reproductive mode of S. knerii in sections 1 and 3 exhibited a prolonged reproductive period, parceled spawning, and a reproductive peak from January to March. In section 2, neither spawning females or spermiated males were captured, probably due to the fact that this section receives cold water with low oxygen levels from the hypolimium of the dam that presents thermal stratification in the summer. This study showed in section 2, immediately downstream of the Três Marias Reservoir, that S. knerii does not reproduce successfully.

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“…These tributaries, in addition to maintaining the reproduction events, have still contributed with the input of larvae to the downstream stretches. Numerous studies carried out in this basin Daga et al, 2009;Gogola et al, 2010;Reynalte-Tataje et al, 2011Da Silva et al, 2015;Silva et al, 2016) and in the basins of the rivers Uruguay (Reynalte-Tataje et al, 2008, 2012aHermes-Silva et al, 2009;Corrêa et al, 2011) and São Francisco (Sato et al, 2005;Weber et al, 2013;Normando et al, 2014;Nunes et al, 2015), as well as in other parts of the world (Bottcher et al, 2013;Webber et al, 2013;López-Casas et al, 2016), have argued for the importance of free-flowing tributaries upstream of regulated rivers as alternative migratory routes. Nevertheless, it is important to emphasize the need for an adequate distance between the spawning site and the complete early embryonic and larval development, preventing the drift of larvae to inappropriate places, such as reservoirs, where they can be preyed upon or settle to the substrate Olden, 2016).…”

Section: Discussionmentioning

confidence: 99%

Importance of dam-free stretches for fish reproduction: the last remnant in the Upper Paraná River

et al. 2017

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Aim: This study uses the abundance of fish eggs and larvae to evaluate the importance of the main channel of the Paraná River and the adjacent areas of the floodplain, in the last dam-free stretch in the Brazilian territory, for the spawning and development of fish of different reproductive guilds, in order to obtain subsidies to assist in the management and conservation policies of this area, focusing on the maintenance of dam-free areas. Methods: Data were taken quarterly from August 2013 to May 2015, in 25 sites, grouped into three biotopes: main channel, tributaries and lagoons. Possible spatial variations in fish spawning and development as well as composition and structure of larvae were evaluated. Results: Higher densities of eggs were found in tributaries (Paracaí and Amambai rivers) and greater densities of larvae were observed in lagoons (Saraiva). Significant differences in composition and structure of larvae were detected only between sampling stations. As for taxonomic composition, 29 taxa were recorded, mostly non-migratory. However, long-distance migratory were also widely distributed, such as Brycon orbignyanus, Pseudoplatystoma corruscans, Prochilodus lineatus, Piaractus mesopotamicus and Rhaphiodon vulpinus, as well as invasive species Platanichthys platana and Hemiodus orthonops. In turn, Salminus brasiliensis presented low occurrence. Conclusions: This study evidenced that different species spawn in the region, mainly in tributaries, and their eggs and larvae are transported to the main channel of the Paraná River and adjacent lagoons, to complete their early development. The capture of larvae of important migratory species suggests that this environment still exhibits suitable conditions for their reproduction, mainly due to the presence of dam-free tributaries. Also, they emphasize the importance of the integrity of these environments for the maintenance of the regional fish fauna, and it is extremely important the monitoring of reproduction of the most endangered species, as well as of invasive species.

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Impact of the Três Marias dam on the reproduction of the forage fish Astyanax bimaculatus and A. fasciatus from the São Francisco River, downstream from the dam, southeastern Brazil

Cited by 29 publications

References 24 publications

Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil

Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil

Comparative analyses of reproductive activity inSchizodon knerii(Steindachner, 1875) (Characiformes: Anostomidae) in three sections of the São Francisco River basin

Importance of dam-free stretches for fish reproduction: the last remnant in the Upper Paraná River

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