Results 81 to 90 of about 1,581,105 (192)

Tributaries as richness source for Oligochaeta assemblage (Annelida) of Neotropical dammed river

Brazilian Journal of Biology
Tributaries may serve as richness source for the river main channel and the zoobenthos community is a good tool to verify this kind of pattern. In this study, we aimed to characterize the benthic invertebrate assemblage in three tributaries associated to
FH Ragonha, DK Petsch, GHZ Alves, HS Santana, TS Michelan, AM Takeda   +5 more
doaj   +1 more source

Fish Assemblages in an Urbanized Neotropical Basin: Influence of Environmental Factors Across Dry and Rainy Periods

International Review of Hydrobiology, Volume 111, Issue 2, December 2026.
ABSTRACT This study investigated the effects of season and environmental disturbances on fish communities in neotropical rivers of the Sorocaba basin, a Sub‐Basin of the Paraná River in Southeast Brazil, based on sampling 1196 individuals from 49 species, including two non‐native and one threatened with extinction.
Natalia S. Alves, Daiane E. Cavallari, Welber S. Smith   +2 more
wiley   +1 more source

Morphodynamics in the Confluence of large regulated Rivers: the case of Paraná and Paranapanema Rivers

Latin American Journal of Sedimentology and Basin Analysis
The confluence of the Paraná and Paranapanema Rivers is studied according to morphology and dynamics. It is probably the only example of this type of fluvial environment involving a large, tropical and intensive regulated river.
José C. Stevaux, Renato J. Paes, André Amâncio Franco, Mário L. de C. Etchebehere, Rafaela Harumi Fujita   +4 more
doaj  

Financial comparisons of the artisanal fisheries in Urubupungá Complex in the middle Paraná River (Brazil)

Brazilian Journal of Biology, 2003
The main objective of this study was a bio-economic survey of artisanal fishing so as to compare average profit of the fishermen, in two different environments (reservoirs and river) and seasons (dry and rainy).
Ceregato S. A., Petrere Jr. M.
doaj  

Fish larvae from the upper Paraná River: do abiotic factors affect larval density?

Neotropical Ichthyology
The purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná ...
Gilmar Baumgartner, Keshiyu Nakatani, Luiz Carlos Gomes, Andréa Bialetzki, Paulo Vanderlei Sanches, Maristela Cavicchioli Makrakis   +5 more
doaj   +1 more source

Ka'aguy Mba'apo: Indigenous Illicit Work and Strategic Opacity in the Interstices of the Paraguay–Brazil Border

PoLAR: Political and Legal Anthropology Review, Volume 49, Issue 2, November 2026.
ABSTRACT This article examines how Indigenous Paĩ Tavyterã/Kaiowa communities along the Paraguay–Brazil border navigate illicit economies that have proliferated amid the expansion of soybean agribusiness and the withdrawal of the state. Drawing on long‐term ethnographic fieldwork in several communities on both sides of the border, it explores how ...
Paul Fabié
wiley   +1 more source

Dynamics of water flow and sediments in the upper Paraná River between Porto Primavera and Itaipu Dams, Brazil

Latin American Journal of Sedimentology and Basin Analysis
The following paper aims to quantify the bedload transport in the Paraná river in the Porto São José cross section (22°45’52”S; 53°10’34”W), between Porto Primavera and Itaipu dams, Brazil.
Débora Pinto Martins, Jean-Paul Bravard, José Cândido Stevaux   +2 more
doaj  

Molecular biogeography of the Neotropical fish Hoplias malabaricus (Erythrinidae:Characiformes) in the Iguaçu, Tibagi, and Paraná Rivers

Genetics and Molecular Biology, 1998
Hoplias malabaricus, the common trahira, extended its range into the Iguaçu River sometime in the last decades. To determine levels of genetic differentiation in neighboring basins of this nominal taxon, as well as to unveil the source of the invading ...
Jorge A. Dergam, Harumi Irene Suzuki, Oscar A. Shibatta, Luiz F. Duboc, Horácio F. Júlio Jr, Lúcia Giuliano-Caetano, William C. Black IV   +6 more
doaj   +1 more source

Continental scale metagenomics reveals Microcystis‐induced synchrony among aquatic taxa is exacerbated by trophic cascades

Ecography, Volume 2026, Issue 10, October 2026.
Harmful Microcystis proliferation severely threatens aquatic ecosystems globally, but its impacts on food‐web stability remain poorly understood. Here, we analyzed 1309 metagenomic samples from freshwater ecosystems across China to investigate how Microcystis abundance affects synchrony among taxa in multi‐trophic food webs (from bacteriophages to ...
Lemian Liu, Siqi Zhu, Xiaoqin Huang, Wenjia Hu, Lixiang Luo, Xiusong Pan, Jianfeng Chen   +6 more
wiley   +1 more source

Fig. 4 in Fish larvae from the upper Paraná River: Do abiotic factors affect larval density?

, 2008
Fig. 4. Scatterplot between the first Detrended Correspon- dence Analysis axis (DCA1) scores and the Principal Components [PC1 (a) and PC2 (b)] retained for interpretation. (A=Amambaí River, I=Ivaí River, P=Paraná River and R= Itaipu Reservoir).Published
Baumgartner, Gilmar, Sanches, Paulo Vanderlei, Nakatani, Keshiyu, Bialetzki, Andréa, Gomes, Luiz Carlos, Makrakis, Maristela Cavicchioli   +5 more
core   +1 more source