Registro de ocorrência de duas espécies de potamotrigonídeos na região do Alto Rio Paraná e algumas considerações sobre sua biologia

Garrone‐Neto, Domingos; Haddad, Vidal; Vilela, Maria José Alencar; Uieda, Virgínia Sanches

doi:10.1590/s1676-06032007000100023

Cited by 28 publications

(28 citation statements)

References 5 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, some of them, e.g. Potamotrygon spp., Garrone-Neto et al (2007), dispersed throughout the Paraná and Tietê rivers, passing through dams using navigation locks. At present, at least 10 of these species reach stretches upstream from the Jupiá Reservoir (i.…”

Section: Resultsmentioning

confidence: 99%

“…In the rio Paraná basin, there are at least six rio Paraná potamotrygonids (P. brachyura, P. castexi, P. falkneri, P. hystrix, P. motoro, and P. schuhmacheri), all of them found just downstream from Sete Quedas Falls. After the impoundment, stingrays appeared in several kinds of environments in the upper rio Paraná basin (Agostinho et al, 2004;Garrone-Neto et al, 2007;Garrone & Sazima, 2009). Fishers of the floodplain above the Itaipu Reservoir had never seen those fish before; thus, several accidents occurred during fishing, mostly when seining on sand beaches at night.…”

Section: Potamotrygonidaementioning

confidence: 99%

See 1 more Smart Citation

A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin

et al. 2009

View full text Add to dashboard Cite

Based on long-term studies in the upper rio Paraná basin, in addition to a broad review of literature and other information, we were able to identify 33 species of native fishes in the lower rio Paraná basin that successfully colonized the upper rio Paraná after Itaipu impoundment, that flooded the natural geographic barrier constituted by the Sete Quedas Falls. These species belong to six Orders, encompassing two of Myliobatiformes, six of Characiformes, 17 of Siluriformes, six of Gymnotiformes, one of Perciformes, and one of Pleuronectiformes. Extensive remarks regarding each species, including their influence upon the native assemblage, in addition to comments on other non-indigenous species, are also provided. We conclude that, in spite of its widespread neglected by environmental impact studies, massive invasion of species is a real possibility when natural barriers are suppressed by reservoirs.Baseando-se em pesquisas de longa duração na bacia do alto rio Paraná, em adição à ampla revisão bibliográfica e outras informações, pudemos reconhecer 33 espécies nativas da bacia do baixo rio Paraná que colonizaram o alto Paraná com sucesso, após a construção de Itaipu, que inundou a barreira geográfica natural constituída pelos Saltos de Sete Quedas. Estas espécies pertencem a seis ordens, incluindo duas de Myliobatiformes, seis de Characiformes, 17 de Siluriformes, seis de Gymnotiformes, uma de Perciformes, e uma de Pleuronectiformes. Extensas observações sobre cada espécie, incluindo a influência delas sobre a assembleia nativa, além de comentários sobre outras espécies não-indígenas são igualmente fornecidos. Nós concluímos que, embora geralmente negligenciadas pelas análises de impactos ambientais, invasões massivas são possibilidades reais quando barreiras naturais são suprimidas por reservatórios.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Potamotrygonidaementioning

confidence: 99%

A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin

et al. 2009

View full text Add to dashboard Cite

show abstract

“…The versatile hunting behavior reported here for the two species of Potamotrygon likely contributed to their recent and successful colonization of new areas and habitats in the upper Paraná River (see Garrone-Neto et al, 2007 and references therein).…”

mentioning

confidence: 82%

“…These rays are often caught for ornamental trade, and occasionally used as food by riverine people (Castex, 1963;Rosa, 1985;Charvet-Almeida et al, 2002). As any other elasmobranch, potamotrygonids are carnivorous and prey on a variety of animals, from aquatic insects and crustaceans to fishes, feeding behavior of theses rays being inferred from gut analyses (Castex, 1963;Achenbach & Achenbach, 1976;Lasso et al, 1996;Lonardoni et al, 2006;Garrone Neto et al, 2007;Silva & Uieda, 2007).…”

mentioning

confidence: 99%

Stirring, charging, and picking: hunting tactics of potamotrygonid rays in the upper Paraná River

Garrone‐Neto

Sazima

2009

Neotrop. ichthyol.

View full text Add to dashboard Cite

Hunting tactics of potamotrygonid freshwater rays remain unreported under natural conditions. Three main foraging tactics of Potamotrygon falkneri and P. motoro are described here based on underwater observations in the upper Paraná River. Both species displayed similar behaviors. The most common tactic was to undulate the disc margins close to, or on, the bottom and thus stirring the substrate and uncovering hidden preys. Another tactic was to charge upon prey concentrated in the shallows. The least common tactic was to pick out prey adhered to the substrate. The first tactic is widespread in several species of marine rays in the Dasyatidae, whereas the remainder (especially picking up prey on substrata above water surface) may be restricted to the Potamotrygonidae.As táticas de caça de raias potamotrigonídeas permanecem sem registro sob condições naturais. Três táticas de forrageamento são aqui descritas para Potamotrygon falkneri e P. motoro, com base em observações subaquáticas no curso superior do rio Paraná. Ambas as espécies apresentaram comportamento semelhante. A tática mais comum foi a de ondular as margens do disco próximo ao, ou no, fundo e assim perturbando o substrato e revelando presas abrigadas. Outra tática foi a de investir sobre presas concentradas no raso. A tática menos frequente foi a de apanhar presas aderidas ao substrato. A primeira tática é comum em diversas espécies de raias marinhas da família Dasyatidae, ao passo que as outras duas (em particular apanhar presas em substratos acima da superfície da água) podem estar restritas a Potamotrygonidae.

show abstract

“…From a total of 42 recorded instances of rays' foraging over unconsolidated bottoms, association with cichlids was recorded for only seven (17%) of these. Thus, the association may be regarded as rare, possibly related to the recent colonization of the upper Paraná River by potamotrygonid rays (Garrone-Neto et al, 2007;Garrone-Neto, 2009).…”

mentioning

confidence: 99%

The more stirring the better: cichlid fishes associate with foraging potamotrygonid rays

Garrone‐Neto

Sazima

2009

Neotrop. ichthyol.

View full text Add to dashboard Cite

One hunting tactic of freshwater rays (Potamotrygonidae), termed "undulate the disc and stir substrate", is here reported to attract cichlids at two sites in the upper Paraná River. The ray species involved in such association are Potamotrygon falkneri and P. motoro, whose activity attract four cichlid species, namely Crenicichla britskii, Satanoperca pappaterra, Cichla kelberi, and Geophagus proximus, the two latter non-native species to the study area. The cichlids approach a ray when it begins to stir the substrate and form sediment clouds, and remain close to the ray during this activity only. The association is here regarded as following behavior even if very transient.Uma tática de caça das raias de água doce (Potamotrygonidae), chamada de "ondular o disco e agitar o substrato", é aqui relatada como atrativa para Cichlidae em dois locais da bacia do alto rio Paraná. As espécies de raias envolvidas nesta associação são Potamotrygon falkneri e P. motoro, cuja atividade atrai quatro espécies de ciclídeos, Crenicichla britskii, Satanoperca pappaterra, Cichla kelberi e Geophagus proximus, as duas últimas exóticas à área de estudo. Os ciclídeos se aproximam de uma raia quando esta começa a remexer o substrato e formar nuvens de sedimento, e permanecem na proximidade da raia apenas durante esta atividade. A associação é aqui considerada como comportamento de seguir, ainda que transitório.

show abstract

Registro de ocorrência de duas espécies de potamotrigonídeos na região do Alto Rio Paraná e algumas considerações sobre sua biologia

Cited by 28 publications

References 5 publications

A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin

A massive invasion of fish species after eliminating a natural barrier in the upper rio Paraná basin

Stirring, charging, and picking: hunting tactics of potamotrygonid rays in the upper Paraná River

The more stirring the better: cichlid fishes associate with foraging potamotrygonid rays

Contact Info

Product

Resources

About