2015
DOI: 10.1590/s1984-46702015000400002
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Abstract: Among the environmental variables, temperature was the most important and the Mantel test detected a significant correlation between temperature and the densities, only for P. lineatus (r = 0.09, p = 0.03). The species in our data chose for spawning tributaries that are not dammed, of which most are outside conservation areas. Therefore, recruitment, maintenance and possible actions aiming to recover the stocks of these species are dependent on the conservation of tributaries and floodplain lakes in the region… Show more

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Cited by 18 publications
(10 citation statements)
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“…In particular, in the Upper Paraná River floodplain, although we have adopted a design with few samplings and only one equipment, the capture of eggs and larvae was considerable (592 eggs and 6,618 larvae) when compared, for example, to the study by Gogola et al (2010) developed exclusively during the reproductive period (October to March), in tributaries and lagoon of the Ilha Grande National Park, in which the authors found 8,029 eggs and 25,190 larvae. This result indicates that despite the fact that it is under several human impacts, the only dam-free stretch in the Upper Paraná River can still be considered an important breeding site for fish species, corroborating the results found by Baumgartner et al (2004), Bialetzki et al (2005), Gogola et al (2010Gogola et al ( , 2013, Reynalte-Tataje et al (2011, Barzotto et al (2015) and Silva et al (2016), which sampled some of the stations here evaluated, with most of the samples performed during the reproductive period.…”
Section: Discussionsupporting
confidence: 88%
See 1 more Smart Citation
“…In particular, in the Upper Paraná River floodplain, although we have adopted a design with few samplings and only one equipment, the capture of eggs and larvae was considerable (592 eggs and 6,618 larvae) when compared, for example, to the study by Gogola et al (2010) developed exclusively during the reproductive period (October to March), in tributaries and lagoon of the Ilha Grande National Park, in which the authors found 8,029 eggs and 25,190 larvae. This result indicates that despite the fact that it is under several human impacts, the only dam-free stretch in the Upper Paraná River can still be considered an important breeding site for fish species, corroborating the results found by Baumgartner et al (2004), Bialetzki et al (2005), Gogola et al (2010Gogola et al ( , 2013, Reynalte-Tataje et al (2011, Barzotto et al (2015) and Silva et al (2016), which sampled some of the stations here evaluated, with most of the samples performed during the reproductive period.…”
Section: Discussionsupporting
confidence: 88%
“…In this context, this study uses the abundance of eggs and larvae of fish to evaluate the importance of the main channel of the Paraná River and the areas adjacent to the floodplain in the last dam-free stretch of the basin 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. Unlike other studies already conducted in this area Nakatani et al, 2004;Bialetzki et al, 2005;Daga et al, 2009;Gogola et al, 2010Gogola et al, , 2013Reynalte-Tataje et al, 2011Barzotto et al, 2015), our approach in the present study allows to evaluate all biotopes (main channel, tributaries and lagoons) of this remnant at the same time, that is, a representation of how the reproductive dynamics of local species occur during reproductive events. The questions to be answered with this approach were: What are the biotopes used for spawning and development?…”
Section: Introductionmentioning
confidence: 99%
“…Sporadic spawnings of migratory species were also observed in a stretch of less than 10 km between the Itá reservoir and the Machadinho dam in the Uruguay River (Reynalte‐Tataje, Nuñer et al, ). Barzotto, Sanches, Bialetzki, Orvati, and Gomes () found indications that Prochilodus lineatus spawned in regions where this activity is uncommon (drift areas), and they associated this fact to the reproductive plasticity of this species, as has also been observed in studies of its spawning resulting from hormonal induction (Britski, ; Castro, ; Godoy, ). However, spawning does not guarantee that recruitment will be successful, because it depends on the availability of adequate environments for downstream larval growth (Reynalte‐Tataje, Nuñer et al, ).…”
Section: Discussionmentioning
confidence: 72%
“…The presence of larvae of newly hatched migratory species in tributaries indicates that these species use them as spawning grounds and migratory routes (Barzotto et al, ; Gogola et al, ). Therefore, the results of this study suggest that the tributaries of the lower Pará River, mainly the Peixe and Picão Rivers, are suitable spawning areas for migratory species, considering the significant numbers of newly hatched Prochilodus larvae recorded and the presence of the Anostomidae family, which encompasses migrants such as Megaleporinus obtusidens (Valenciennes 1837) (Ávila‐Simas, Reynalte‐Tataje, & Zaniboni‐Filho, ).…”
Section: Discussionmentioning
confidence: 99%
“…A link between floods and river landings suggested an association between the recruitment of migratory fishes and water level (Quirós & Cuch, 1989;Rabuffetti et al, 2016). Other investigations conducted in the Upper River Paraná (Bailly, Agostinho & Suzuki, 2008;Gomes & Agostinho, 1997;Oliveira, Suzuki, Gomes & Agostinho, 2015;Suzuki et al, 2009) showed a relationship between high flood events and the recruitment of migratory species; however, on the basis of young fish surveys, the details of the initial dynamics of recruitment by monitoring earlier stages of fishes are less frequent (Barzotto, Sanches, Bialetzki, Orvati & Gomes, 2015;Zaniboni-Filho & Schulz, 2003).…”
Section: Introductionmentioning
confidence: 99%