Bacterial bioerosion in human and animal bones from subtropical environments (Northern Pampa/Middle Paraná River Basin, República Argentina)

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

Relationships between photosynthetic plant types in the diet of herbivore mammals and in the environment in the lower Paraná river basin, Argentina

Revista chilena de historia natural ◽

10.4067/s0716-078x2010000200011 ◽

2010 ◽

Vol 83 (2) ◽

Cited By ~ 2

Author(s):

NORA MADANES ◽

RUBÉN D QUINTANA ◽

MARIELA BIONDINI ◽

DANIEL LOPONTE

Keyword(s):

River Basin ◽

Paraná River ◽

Parana River ◽

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

Morphological differentiation among migratory fish species from the Paraná River basin

Biota Neotropica ◽

10.1590/s1676-06032012000400003 ◽

2012 ◽

Vol 12 (4) ◽

pp. 41-49 ◽

Cited By ~ 2

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.

Download Full-text