Results 41 to 50 of about 47,996 (245)

Fish, Barra Bonita River, upper Paraná River basin, state of Paraná, Brazil. [PDF]

open access: yesCheck List, 2008
The Barra Bonita River is an affluent of the left margin of the Ivaí River, upper Paraná River basin. Fishsamples were conduced in November 2006 (spring) and in February 2007 (summer), in three sampling stations alongthe Barra Bonita River, using gill ...
Bifi, A. G.   +3 more
doaj   +4 more sources

Rickettsia parkeri in Argentina

open access: yesEmerging Infectious Diseases, 2008
Clinical reports of an eschar-associated rickettsiosis in the Paraná River Delta of Argentina prompted an evaluation of Amblyomma triste ticks in this region. When evaluated by PCR, 17 (7.6%) of 223 questing adult A.
Santiago Nava   +5 more
doaj   +1 more source

First record of Pithophora oedogonia (Montagne) Wittrock (Pithophoraceae) in the Upper Paraná River floodplain, Brazil [PDF]

open access: yesCheck List, 2015
Pithophora is the only genus recorded of the Pithophoraceae family in Brazil. Pithophora specimens were found close to banks of Hydrilla verticillata (L.F.) Royle in the Upper Paraná River floodplain.
Vanessa Algarte   +3 more
doaj   +3 more sources

Ichthyological ecoregions of Argentina [PDF]

open access: yes, 2002
The Argentine Republic is situated in the southernmost portion of the American continent, occupying over 2,785,600 km2 not including the Antarctic territory. The country ranges from subtropical areas (21º46’S) to subantarctic regions (55º03’S), extending
López, Hugo Luis   +2 more
core  

Application of Principal Component Analysis and Probabilistic Neural Networks in Ferralsols Recovery Evaluation Through Planting of Mabea Fistulifera and Eucalyptus Urograndis

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT This study presents an innovative assessment model for analyzing the evolution of degraded soils subjected to different reclamation strategies. The proposal combines statistical and artificial intelligence tools to jointly integrate multiple physical and chemical soil properties, allowing for a more synthetic view of the processes.
Melissa Alexandre Santos   +7 more
wiley   +1 more source

Genetic variability and evidence of founder effect in Hemiodus orthonops (Characiformes: Hemiodontidae) from the upper Paraná River basin, Brazil

open access: yesActa Scientiarum: Biological Sciences, 2017
  Hemiodus orthonops is a small fish of the Hemiodontidae family, order Characiformes, with a maximum of 25 cm standard length. Until recently, H. orthonops was an endemic species from the Paraná-Paraguay basin and it was absent from the upper Paraná ...
Liégie Alher Marques, Erasmo Renesto
doaj   +1 more source

Fishes (Osteichthyes: Actinopterygii) from the Pirapó River drainage, upper Paraná River basin, Paraná state, Brazil [PDF]

open access: yesCheck List, 2012
In this study we conducted an ichthyofaunistic survey in the Pirapó River drainage, upper Paraná River basin, based on voucher specimens deposited in the Coleção Ictiológica do Nupélia/UEM.
João Pagotto   +3 more
doaj   +3 more sources

Taxonomy and diversity of Marcgraviaceae, north of the São Francisco river, northeast Brazil

open access: yesNordic Journal of Botany, EarlyView.
This study provides a comprehensive assessment of Marcgraviaceae species diversity north of the São Francisco river in northeastern Brazil, analyzing species richness and distribution patterns across 384 000 km² of phytogeographic domains. Through field collections, herbarium studies (both physical and digital), and detailed morphological analyses, we ...
Thales Carvalho   +4 more
wiley   +1 more source

Nucleotide diversity of Hemigrammus cf. marginatus (Characiformes, Characidae) in the upper Paraná river floodplain - doi: 10.4025/actascibiolsci.v34i3.6669

open access: yesActa Scientiarum: Biological Sciences, 2012
Characidae is the largest and more diversified family from Characiformes and presents several classification problems, with several genera currently allocated as incertae sedis, such as the genus Hemigrammus.
Thiago Cintra Maniglia   +5 more
doaj   +1 more source

Morphology, flow structure, and sediment transport in the Paraná and Piquiri Rivers confluence, Brazil

open access: yesRevista Brasileira de Geomorfologia, 2023
Confluences are places of complex interaction of flow and sediments coming from different channels. Studies at large confluences have advanced the understanding of these environments on a larger scale.
Altair Bennert   +3 more
doaj   +1 more source

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