2014
DOI: 10.1590/1982-0224-20130116
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Pools and rapids as spawning and nursery areas for fish in a river stretch without floodplains

Abstract: This study aimed to evaluate the importance of two environments situated in the main channel of the Peixe River (a tributary of the upper Uruguay River) on fish reproduction and initial growth. Ichthyoplankton, macrozooplankton, and zoobenthos collections were taken on a monthly basis from October 2011 to March 2012, sampling a rapids and a pool environment. The instrument used for the capture of the ichthyoplankton in both environments was a light trap. In total, 795 eggs and 274 larvae were captured. The spe… Show more

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Cited by 23 publications
(23 citation statements)
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“…The hydrodynamic conditions of lotic environments, especially water direction and velocity, increase connectivity between important environments for the different phases of the fish life cycle, being responsible for driving eggs and newly hatched larvae from spawning to nursery grounds (Baumgartner, Nakatani, Gomes, Bialetzki, & Sanches, ; Lechner, Keckeis, & Humphries, ). The distribution pattern we observed has previously been recorded in the Uruguay River (Ávila‐Simas et al, ; Reynalte‐Tataje, Agostinho et al, ; Ziober, Reynalte‐Tataje, & Zaniboni‐Filho, ) and in other watersheds (Lechner et al, ; Suzuki & Pompeu, ; Widmer, Fluder, Kehmeier, Medley, & Valdez, ).…”
Section: Discussionsupporting
confidence: 84%
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“…The hydrodynamic conditions of lotic environments, especially water direction and velocity, increase connectivity between important environments for the different phases of the fish life cycle, being responsible for driving eggs and newly hatched larvae from spawning to nursery grounds (Baumgartner, Nakatani, Gomes, Bialetzki, & Sanches, ; Lechner, Keckeis, & Humphries, ). The distribution pattern we observed has previously been recorded in the Uruguay River (Ávila‐Simas et al, ; Reynalte‐Tataje, Agostinho et al, ; Ziober, Reynalte‐Tataje, & Zaniboni‐Filho, ) and in other watersheds (Lechner et al, ; Suzuki & Pompeu, ; Widmer, Fluder, Kehmeier, Medley, & Valdez, ).…”
Section: Discussionsupporting
confidence: 84%
“…Because the Upper Uruguay River lacks floodplains, transitional pools and backwaters tend to form, creating important breeding areas for fish. A previous study found that preflexion larvae were associated with pools in a tributary of the Upper Uruguay River (Ávila‐Simas et al, ). Similarly, fish larvae between flexion and postflexion stages were found in backwater areas of the Broken River, Australia (King, ).…”
Section: Discussionmentioning
confidence: 94%
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“…The present study cannot confirm if M. paucisquamatus uses streams to spawn, but the absence of immature fish in our samples indicates that smaller fish use other habitats for some period of time, probably smaller water bodies. Considering that the upper rio Tocantins runs through the valley and lowland areas are naturally scarce (Ribeiro et al, 1995), recruitment dynamics may involve spawning in small tributaries where larvae and juveniles grow, and migration to main channels as they attain larger sizes and sexual maturity; a pattern analogous to other embedded rivers (Ávila-Simas et al, 2014). Future studies must further investigate these dynamics to identify spawning and growing sites, but our results indicate that adults live in the main channel while early life forms and juveniles grow in other, yet unknown, habitats.…”
Section: Discussionmentioning
confidence: 99%