scholarly journals A new genus and species of the Monticelliinae (Eucestoda: Proteocephalidea), a parasite of Pseudoplatystoma fasciatum (Pisces: Siluriformes) from the Parana River basin (Argentina), with comments on microtriches of proteocephalideans

2013 ◽  
Vol 60 (3) ◽  
pp. 248-256 ◽  
Author(s):  
Nathalia J. Arredondo ◽  
Alain de Chambrier ◽  
Alicia A. Gil de Pertierra
Keyword(s):  
River Basin ◽  
New Genus ◽  
Paraná River ◽  
New Genus And Species ◽  
Parana River ◽  
Paraná River Basin

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

2011 ◽  
Vol 11 (2) ◽  
pp. 55-62 ◽  
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.

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

Biologia ◽  
2017 ◽  
Vol 72 (6) ◽  
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

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

2000 ◽  
Vol 60 (4) ◽  
pp. 633-636 ◽  
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.

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 Description of a new genus and species of Candonopsini (Crustacea, Ostracoda, Candoninae) from the alluvial valley of the Upper Parana River (Brazil, South America)

2012 ◽  
Author(s):  
Janet Higuti ◽  
Koen Martens
Keyword(s):  
New Genus ◽  
Terminal Segment ◽  
Paraná River ◽  
New Combination ◽  
New Genus And Species ◽  
Alluvial Valley ◽  
Parana River ◽  
Mandibular Palp ◽  
Upper Paraná River ◽  
Basal Width

The genus Candobrasilopsis gen. nov. is here described, with C. rochai gen. nov. sp. nov. as type species, from the alluvial valley of the Upper Paraná River. The enigmatic Candonopsis brasiliensis Sars, 1901 is here redescribed and transferred to this new genus, the new combination being Candobrasilopsis brasiliensis (Sars, 1901). The new candonid genus belongs to the tribe Candonopsini, because of the absence of the proximal seta on the caudal ramus. It is closely related to Latinopsis Karanovic & Datry, 2009, because of the relatively short terminal segment of the mandibular palp (length less than 1.5 times the basal width, while this segment is longer than three times the basal width in Candonopsis) and the large and stout b-seta on the T1. However, it differs markedly from Latinopsis in the size and shape of the calcified inner lamellae of both valves and in the type of hemipenis. We also discuss the doubtful allocation of several other genera to the Candonopsini, raise Abcandonopsis Karanovic, 2004 to generic status and reassess the uncertain position of Candonopsis anisitsi Daday, 1905 within Latinopsis.

scholarly journals Fish, Piquiri River, Upper Paraná River basin, Paraná state, Brazil

Check List ◽  
2006 ◽  
Vol 2 (3) ◽  
pp. 9 ◽  
Author(s):  
Éder André Gubiani ◽  
Arlei José Holzbach ◽  
Gilmar Baumgartner ◽  
Leontino Borges de Rezende Neto ◽  
Fernando Bergmann
Keyword(s):  
River Basin ◽  
Paraná River ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Paraná River Basin

None

FISH DIVERSITY DOWNSTREAM OF HYDROPOWER PLANTS OF THE UPPER PARANÁ RIVER BASIN, BRAZIL

2016 ◽  
Author(s):  
RAFAEL COUTO ROSA SOUZA ◽  
RAONI ROSA RODRIGUES ◽  
ANA CAROLINA LACERDA RÊGO ◽  
ÁTILA RODRIGUES ARAÚJO ◽  
IVO GAVIÃO PRADO ◽  
...  
Keyword(s):  
River Basin ◽  
Paraná River ◽  
Fish Diversity ◽  
Parana River ◽  
Hydropower Plants ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Paraná River Basin
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