Record of ascending passage of potamotrygonid stingrays through navigation locks: implications for the management of non-native species in the Upper Paraná River basin, Southeastern Brazil

Abstract: Albinism has been recorded in Neotropical freshwater fishes, mostly for nocturnal or cryptobiotic species. We report herein a case of albinism in the catfish Cambeva guareiensis (Trichomycteridae) from the Guareí River basin, Upper Paraná River basin, southeastern Brazil. The albino fish was caught with seven individuals with typical color pattern of the species. The features of the albino fish in life and shortly after preservation are described and illustrated.

Download Full-text

Activity and habitat use of two species of stingrays (Myliobatiformes: Potamotrygonidae) in the upper Paraná River basin, Southeastern Brazil

Neotropical Ichthyology ◽

10.1590/s1679-62252012000100008 ◽

2012 ◽

Vol 10 (1) ◽

pp. 81-88 ◽

Cited By ~ 14

Author(s):

Domingos Garrone Neto ◽

Virgínia Sanches Uieda

Keyword(s):

Habitat Use ◽

River Basin ◽

Habitat Diversity ◽

Sandy Beaches ◽

Paraná River ◽

Southeastern Brazil ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Paraná River Basin

The life history of freshwater stingrays (Potamotrygonidae) under natural conditions has been poorly documented. In this study, we investigated theperiod of activity and the habitat use of two species of the genus Potamotrygon in the upper Paraná River basin, Southeastern Brazil. Potamotrygon falkneri and P. motoro are similar to each other as far as the analyzed behavior is concerned. Individuals of both species segregate according to their size, and in function of the depth and period of the day. Younger individuals inhabit mostly sandy beaches and places that are no deeper than four meters throughout the whole day. Bigger stingrays realize bathymetric migrations, alternating their position between places deeper than eight meters during the day, and shallow areas at night. Individuals of intermediate size inhabit transition environments that have greater habitat diversity. Both species presented mostly nocturnal habits, especially regarding their feeding behavior. The behavioral patterns observed seem to go through ontogenetic variations and probably change throughout the year, between dry and wet seasons.

Download Full-text

Ichthyofauna of two streams (silted and reference) in the Upper Paraná river basin, Southeastern Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842004000500004 ◽

2004 ◽

Vol 64 (4) ◽

pp. 757-765 ◽

Cited By ~ 14

Author(s):

L. Casatti

Keyword(s):

River Basin ◽

Dominant Species ◽

Fish Assemblages ◽

Paraná River ◽

Southeastern Brazil ◽

Riparian Management ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Paraná River Basin

In this study the fish assemblages of the silted Águas Claras stream (AC) was compared with that of a reference, the São Carlos stream (SC), so as to identify potential fish indicators of integrity or degradation. Both streams, located about 5 km from one another, are part of the Upper Paraná river basin, Brazil, and present similar physiographical features. Twenty-one species were collected in AC (1,271 specimens) and 18 in SC (940 specimens). In AC, dominant species e.g., Corydoras aeneus (sandy pools), Serrapinnus notomelas, and Pyrrhulina australis (warm marginal shallow pools) were those favored by new microhabitats linked to siltation and removal of the riparian vegetation. Changes in the composition of the marginal vegetation resulted in dominance of species such as Hisonotus francirochai (marginal grasses). In SC the dominant species was Phalloceros caudimacultus, abundant in marginal shallow pools, and Trichomycterus diabolus. and Hypostomus nigromaculatus, exclusively riffle-dwelling species, which were absent in AC. Fish assemblage monitoring is recommended for use in riparian management programs in order to evaluate negative instream sedimentation effects.

Download Full-text

Population aspects of Bryconamericus stramineus in streams of the upper Paraná River basin, Brazil

Biota Neotropica ◽

10.1590/s1676-06032011000200006 ◽

2011 ◽

Vol 11 (2) ◽

pp. 55-62 ◽

Cited By ~ 5

Author(s):

Lilian Paula Vasconcelos ◽

Yzel Rondon Súarez ◽

Sidnei Eduardo Lima-Junior

Keyword(s):

River Basin ◽

Paraná River ◽

Ovary Development ◽

Recruitment Pattern ◽

Growth Coefficient ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Sexually Mature ◽

Paraná River Basin

In order to describe some aspects of the population ecology of Bryconamericus stramineus in the Guiraí River basin, upper Paraná River basin, samples were taken bimonthly from October 2006 to August 2007 at seven sites in the basin. A total of 960 individuals, including 532 females, 316 males, and 112 of undetermined sex, were collected. A significant variation in the sex ratio was observed (Χ2 = 32.82; p < 0.001). Females were larger (59.7 mm) than males (58.9 mm); however, males showed a larger angular growth coefficient (b) than females. It was estimated that 50% of females were sexually mature at 36.4 mm. The highest rate of ovary development was observed in October, while in June 2007 no mature females were found. Mean fecundity was estimated at 313 eggs, and the relative fecundity was 184.6 eggs/g. The asymptotic was estimated at 62.8 mm and the growth rate at 0.76. The growth performance index was calculated at 3.47, the longevity at 3.94 years and the mortality (M) at 1.18 years. The recruitment pattern of the species showed peaks concentrated in periods of low rainfall.

Download Full-text

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil

Genetics and Molecular Biology ◽

10.1590/s1415-47572011005000028 ◽

2011 ◽

Vol 34 (3) ◽

pp. 496-501 ◽

Cited By ~ 1

Author(s):

Ana Flávia Reusing ◽

Erasmo Renesto ◽

Fábio F. Roxo ◽

Cláudio H. Zawadzki

Keyword(s):

River Basin ◽

Paraná River ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Two Populations ◽

Paraná River Basin

Download Full-text

Chromosomal characteristics of rDNA in a conserved karyotype of two Sternopygus macrurus (Gymnotiformes: Sternopygidae) populations from upper Paraná River basin

Biologia ◽

10.1515/biolog-2017-0071 ◽

2017 ◽

Vol 72 (6) ◽

Cited By ~ 4

Author(s):

Carlos Alexandre Fernandes ◽

Lucas Baumgärtner ◽

Leonardo Marcel Paiz ◽

Vladimir Pavan Margarido ◽

Ana Luiza de Brito Portela-Castro

Keyword(s):

River Basin ◽

Paraná River ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Paraná River Basin

AbstractKaryotype and chromosomal characteristics of both minor and major rDNA of

Download Full-text

New record of planktonic cladoceran to the upper Paraná River, Brazil: Bosmina huaroensis Delachaux, 1918

Revista Brasileira de Biologia ◽

10.1590/s0034-71082000000400013 ◽

2000 ◽

Vol 60 (4) ◽

pp. 633-636 ◽

Cited By ~ 2

Author(s):

L. F. M. VELHO ◽

F. A. LANSAC-TÔHA ◽

C. C. BONECKER

Keyword(s):

River Basin ◽

New Record ◽

First Record ◽

Paraná River ◽

Parana River ◽

First Occurrence ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Paraná River Basin

In this paper we register the first occurrence of Bosmina huaroensis Delachaux, 1918 in the upper Paraná River basin, which is probably the first record to Brazil. Illustrations and an updated description of the species are given.

Download Full-text