2012
DOI: 10.1590/s0044-59672012000200018 View full text |Buy / Rent full text
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Abstract: Freshwater stingrays, or potamotrygonids, are restricted to Neotropical river drainages. These elasmobranchs are well adapted to freshwater environments and the number of described species gradually increases as further research is carried out. Some of the first studies on their systematics and natural history were carried out in the 1960s and 1970s in southern South America. However, there is no new published data on potamotrygonids from Uruguayan waters since then (except for local journal reports from sport… Show more

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“…Recent classifications of this family included five genera, Heliotrygon , Paratrygon , Plesiotrygon , Potamotrygon and Styracura [2,3]. One of the first described freshwater stingray was P. motoro , which is the most widespread species of the whole family across South America, found in freshwater rivers in Uruguay, Paraná-Paraguay, Orinoco, and Amazon River basins [1,4,5].…”
Section: Introductionmentioning
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“…Recent classifications of this family included five genera, Heliotrygon , Paratrygon , Plesiotrygon , Potamotrygon and Styracura [2,3]. One of the first described freshwater stingray was P. motoro , which is the most widespread species of the whole family across South America, found in freshwater rivers in Uruguay, Paraná-Paraguay, Orinoco, and Amazon River basins [1,4,5].…”
Section: Introductionmentioning
“…A second assumption of our analysis is that fishermen practice tail mutilation throughout the study area. Although there are no quantifications of the incidence of this practice, it is well known that tail mutilation is widespread along the Paraná River and in most other South American river basins where river stingrays occur (Castex, 1963;Rincon, 2006;Duncan et al, 2010;Garrone Neto, 2010;Oddone et al, 2012;Gama and Rosa, 2013;Rincon et al, 2013). In addition, Rincon (2006) has shown that the abundance of tailless river stingrays decreases with distance from fishing villages, which indicates a direct relationship between stingray tail mutilation and fishing effort.…”
Section: Yearmentioning
“…Castex, 1963;Garrone Neto, 2010), as well as in many other South American rivers (e.g. Rincon, 2006;Duncan et al, 2010;Oddone et al, 2012;Gama and Rosa, 2013;Rincon et al, 2013). When fishermen catch a river stingray, it is very common that they cut off its tail just anterior to the sting (Rosa et al, 2010).…”
Section: Introductionmentioning