scholarly journals A barrier to upstream migration in the fish passage of Itaipu Dam (Canal da Piracema), Paraná River basin

2012 ◽  
Vol 10 (4) ◽  
pp. 697-704 ◽  
Author(s):  
Hélio Martins Fontes Júnior ◽  
Theodore Castro-Santos ◽  
Sergio Makrakis ◽  
Luiz Carlos Gomes ◽  
João Dirço Latini
Keyword(s):  
Fish Passage ◽  
Neotropical Region ◽  
Paraná River ◽  
System Component ◽  
Upstream Migration ◽  
Prochilodus Lineatus ◽  
Parana River ◽  
Itaipu Dam ◽  
Low Efficiency ◽  
Main Barrier

The majority of the fish passages built in the Neotropical region are characterised by low efficiency and high selectivity; in many cases, the benefits to fish populations are uncertain. Studies conducted in the Canal da Piracema at Itaipu dam on the Parana River indicate that the system component designated as the Discharge channel in the Bela Vista River (herein named Canal de deságue no rio Bela Vista or CABV), a 200 m long technical section, was the main barrier to the upstream migration. The aim of this study was to evaluate the degree of restriction imposed by the CABV on upstream movements of Prochilodus lineatus and Leporinus elongatus, Characiformes. Fish were tagged with passive integrated transponders (PIT tags) and released both downstream and upstream of this critical section. Individuals of both species released downstream of the CABV took much more time to reach the upper end of the system (43.6 days vs. 15.9 days), and passed in much lower proportions (18% vs. 60.8%) than those tagged upstream of this component. Although more work is needed to differentiate between fishway effects and natural variation in migratory motivation, the results clearly demonstrate passage problems at the CABV.

scholarly journals Chromosomal Characterization of Prochilodus lineatus from Paraná River, Corrientes, Argentina. I.

CYTOLOGIA ◽  
2011 ◽  
Vol 76 (2) ◽  
pp. 219-222 ◽  
Author(s):  
Lilian Cristina Jorge ◽  
Sebastián Sanchez ◽  
Orlando Moreira Filho
Keyword(s):  
Paraná River ◽  
Prochilodus Lineatus ◽  
Parana River

scholarly journals Morphological differentiation among migratory fish species from the Paraná River basin

2012 ◽  
Vol 12 (4) ◽  
pp. 41-49 ◽  
Author(s):  
Lucileine de Assumpção ◽  
Maristela Cavicchioli Makrakis ◽  
Sergio Makrakis ◽  
Pitágoras Augusto Piana ◽  
Patrícia Sarai da Silva ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Fish Passage ◽  
Paraná River ◽  
Migratory Fish ◽  
Migratory Species ◽  
Caudal Peduncle ◽  
Parana River ◽  
Maximum Body ◽  
Paraná River Basin

This study characterized the morphological differences among migratory fish species from the Paraná River Basin. A total of 177 adult fish of Leporinus elongatus, Leporinus macrocephalus, Prochilodus lineatus, Salminus brasiliensis, Pimelodus maculatus, Pinirampus pirinampu, Pseudoplatystoma corruscans, Pterodoras granulosus, and Rhaphiodon vulpinus were sampled in the Canal da Piracema, a fish passage system at Itaipu Dam, Paraná River. The migratory species were analyzed through 22 morphometric measurements and fineness ratio to identify morphological patterns related to swimming performance. Four species groups were indicated by the Cluster analysis: I) R. vulpinus; II) P. corruscans; III) L. macrocephalus, L. elongatus, P. lineatus, P. maculatus, and S. brasiliensis - measurements of head height and anal fin length formed this group; and IV) P. granulosus and P. pirinampu - measurements of maximum body width and caudal peduncle width contributed to form this group. The morphometric variables that most contributed to the distinction were head length and mouth width for groups I and II. The species R. vulpinus and P. granulosus differed from other species, showing fineness ratios of 9.4 and 3.7, respectively. Leporinus elongatus, L. macrocephalus, P. lineatus, P. maculatus, and S. brasiliensis showed significant differences from other species, with ratios ranging from 4.57 to 5.19, indicating that these species may be better swimmers. Long-distance migratory species using the Piracema Canal to ascend upstream areas differed morphologically, morphological characteristics such as a narrow caudal peduncle and maximum body length, besides to the values of the fineness ratio, were essential to differentiate the migratory species.

scholarly journals Trophic position of bottom-feeding fish in the Upper Paraná River floodplain

2009 ◽  
Vol 69 (2 suppl) ◽  
pp. 573-581 ◽  
Author(s):  
CA. Lopes ◽  
E. Benedito ◽  
LA. Martinelli
Keyword(s):  
Trophic Position ◽  
Paraná River ◽  
Food Sources ◽  
Prochilodus Lineatus ◽  
River Floodplain ◽  
Parana River ◽  
Spatial Differences ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River ◽  
Paraná River Floodplain

The δ15N composition of bottom-feeding fish (iliophagous = Apareiodon affinis, Cyphocharax nagelii, Prochilodus lineatus, Steindachnerina brevipinna and S. insculpta; detritivorous = Loricariichthys platymetopon and Liposarcus anisitsi; benthophagous = Satanoperca pappaterra and Hoplosternum littorale) and their primary food sources were investigated in the upper Paraná River floodplain during rainy seasons in different environments (lotic and lentic). Two hypotheses were tested: i) that the trophic position and isotopic values of the investigated organisms (fish and food resources) vary spatially; and ii) that trophic position and isotopic compositions differ among iliophagous, detritivorous and benthophagous fish. C4 macrophytes, periphyton and phytoplankton were isotopically different in sites analyzed. Significant isotopic differences occurred in the species of each trophic category. Spatial differences were observed in the isotopic composition of P. lineatus and L. platymetopon, whose values were more enriched in the Paraná River and Pau Véio Lake. Significant spatial differences in trophic position were observed for L. platymetopon and H. littorale, which presented the highest values in the Paraná and Baía rivers, respectively. Trophic positions were significantly different among the species that composed each trophic category. These findings demonstrate that in energy-flow studies in detrital food chains generalizations concerning the grouping of fish into trophic categories and/or habitats should only be carried out after careful investigations of the local/specific trophic dynamics of the organisms.

Neoechinorhynchus curemai (Acanthocephala: Neoechinorhynchidae) in Prochilodus lineatus (Osteichthyes: Prochilodontidae) from the Paraná River, Brazil

2005 ◽  
Vol 134 (1-2) ◽  
pp. 111-115 ◽  
Author(s):  
R.S. Santos ◽  
M.L. Martins ◽  
N.G. Marengoni ◽  
C.J. Francisco ◽  
R.S. Piazza ◽  
...  
Keyword(s):  
Paraná River ◽  
Prochilodus Lineatus ◽  
Parana River

scholarly journals Fish passage system in an irrigation dam (Pilcomayo River basin ): when engineering designs do not match ecohydraulic criteria

2012 ◽  
Vol 10 (4) ◽  
pp. 741-750 ◽  
Author(s):  
Claudio R. M. Baigún ◽  
John M. Nestler ◽  
Priscilla Minotti ◽  
Norberto Oldani
Keyword(s):  
Fish Passage ◽  
Water Levels ◽  
Upstream Migration ◽  
Prochilodus Lineatus ◽  
Hydrological Variability ◽  
Engineering Designs ◽  
Standard Designs ◽  
The Many ◽  
Upper Pool ◽  
Dissipation Power

The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomayo River. In addition, the many fish that concentrate immediately downstream of the dam may suffer high mortality when they are stranded during low water periods. The goals of this study are to determine if fish are able to pass the spillway and to assess if the design of the installed ladders (pool and weir type) effectively supports upstream migration of Prochilodus lineatus (sábalo). Results showed that only fish longer than 39 cm should be able to ascend the spillway chute, but when water levels on the spillway crest are over 0.4 m. Fish are also unable to jump from spillway toe to spillway crest because the downstream dissipation pool does not meet the minimum depth criterion for fish to accelerate to sufficient velocity. Fish ladders have insufficient number of pools and some pool dimensions and designs depart from accepted standard designs. Volumetric dissipation power in the upper pool of each fish ladder is too low for fish to rest. Also, attraction flows relative to total spillway discharge at the entrance to each fishway are insufficient. Fish passage failures of both the spillway and pool and weir systems in La Estrella marsh can be traced to the "salmon-centric" concept used by the designers. We conclude that the Route 28 Dam design including its fish passage systems, do not follow criteria to cope with the strong hydrological variability and bioecological characteristics of fish inhabiting pulsatile systems such as La Estrella marsh.

scholarly journals Predicting the invasive potential of the cladoceran Daphnia lumholtzi Sars, 1885 (Crustacea: Cladocera: Daphniidae) in the Neotropics: are generalists threatened and relicts protected by their life-history traits?

2016 ◽  
Author(s):  
Francisco Diogo R. Sousa ◽  
Alexandre V. Palaoro ◽  
Lourdes M.A. Elmoor-Loureiro ◽  
Alexey A. Kotov
Keyword(s):  
River Basin ◽  
Native Species ◽  
Neotropical Region ◽  
Paraná River ◽  
Climatic Niche ◽  
Relict Species ◽  
Daphnia Lumholtzi ◽  
Parana River ◽  
South Central ◽  
Paraná River Basin

<p>            Invasive species are one of the major threats to biodiversity, which is aggravated in poorly known groups, such as<em> </em>cladocerans. <em>Daphnia lumholtzi </em>Sars (Cladocera: Anomopoda: Daphniidae)<em> </em>is currently invading the Neotropical region, and there are few records of this process. Our goal was to predict the invasive scenario for <em>D. lumholtzi </em>in the Neotropics using species distribution modelling and to assess the climatic overlap of the invader with the native species. We trained our MaxEnt model using occurrence records from native and invaded areas and projected it in the Neotropics. Additionally, we compared the climatic niche of some native species with the invader’s niche. Our model showed high environmental suitability in areas connected by the lowland Paraná River Basin (southwestern Brazil, eastern Argentina and Uruguay), in south-central Chile and Atlantic coastal areas. Widely distributed native species showed climatic overlap with the invader, while relict species did not. <em>Daphnia lumholtzi</em> thrives in warm and stable environments (e.g. the Paraná River basin), which of concern because the invader could already be spreading in that area. Native species could suffer due to climatic niche similarity, while natural barriers and local environmental conditions may protect relict species. We urge the need for further studies to understand this invasion process more fully.   </p>

scholarly journals Experimental assessment of the effects of a Neotropical nocturnal piscivore on juvenile native and invasive fishes

2012 ◽  
Vol 10 (1) ◽  
pp. 167-176 ◽  
Author(s):  
Alejandra F. G. N. Santos ◽  
Carles Alcaraz ◽  
Luciano N. Santos ◽  
Carmino Hayashi ◽  
Emili García-Berthou
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Ictalurus Punctatus ◽  
Habitat Complexity ◽  
Paraná River ◽  
Microhabitat Use ◽  
Prochilodus Lineatus ◽  
Parana River ◽  
Shoaling Behavior ◽  
Paraná River Basin

We experimentally examined the predator-prey relationships between juvenile spotted sorubim Pseudoplastystoma corruscans and young-of-the-year invasive and native fish species of the Paraná River basin, Brazil. Three invasive (peacock bass Cichla piquiti, Nile tilapia Oreochromis niloticus, and channel catfish Ictalurus punctatus) and two native (yellowtail tetra Astyanax altiparanae and streaked prochilod Prochilodus lineatus) fish species were offered as prey to P. corruscans in 300 L aquaria with three habitat complexity treatments (0%, 50% and 100% structure-covered). Prey survival was variable through time and among species (C. piquiti < O. niloticus < A. altiparanae < P. lineatus < I. punctatus), depending largely on species-specific prey behavior but also on prey size and morphological defenses. Habitat complexity did not directly affect P. corruscans piscivory but some prey species changed their microhabitat use and shoaling behavior among habitat treatments in predator's presence. Pseudoplatystoma corruscans preyed preferentially on smaller individuals of those invasive species with weak morphological defensive features that persisted in a non-shoaling behavior. Overall, our results contrast with those in a companion experiment using a diurnal predator, suggesting that nocturnal piscivores preferentially prey on different (rather diurnal) fish species and are less affected by habitat complexity. Our findings suggest that recovering the native populations of P. corruscans might help controling some fish species introduced to the Paraná River basin, particularly C. piquiti and O. niloticus, whose parental care is expected to be weak or null at night.

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

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Jislaine Cristina Silva ◽  
Rafael Rogério Rosa ◽  
Eliana Maria Galdioli ◽  
Claudemir Martins Soares ◽  
Wladimir Marques Domingues ◽  
...  
Keyword(s):  
Invasive Species ◽  
Fish Fauna ◽  
Taxonomic Composition ◽  
Main Channel ◽  
Paraná River ◽  
Long Distance ◽  
Prochilodus Lineatus ◽  
Parana River ◽  
Composition And Structure ◽  
Eggs And Larvae

Abstract 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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