Results 61 to 70 of about 3,534 (159)

Diagnosis and Off‐Label Treatment of Subcutaneous Putative Dracunculoid Nematodes in Apteronotus albifrons Originating From Wild‐Caught Fisheries

Journal of Fish Diseases, EarlyView.
ABSTRACT Apteronotus albifrons (Gymnotiformes: Apteronotidae), commonly known as the black ghost knifefish, is a high‐value ornamental fish that is susceptible to various parasites. The affected fish were wild‐caught fisheries and subsequently introduced into a commercial breeding system.
Pedro Henrique Magalhães Cardoso, Simone de Carvalho Balian, Herbert Sousa Soares, Marcelo Bahia Labruna, Gracienhe Gomes dos Santos, José Blanchard Girão Ribeiro Filho, Mauricio Laterça Martins   +6 more
wiley   +1 more source

Molecular phylogenetic analysis sheds light on the diversity and evolutionary history of the Neotropical and African Triplophyllum (Tectariaceae)

Journal of Systematics and Evolution, EarlyView.
We used a molecular approach to resolve the evolutionary lineages of Neotropical Triplophyllum, uncovering that current species circumscriptions are hindered by high morphological homoplasy in indument characters. Our results support the recognition of three new species and provide a necessary neotypification for T.
Mauricio Gonçalves Nunes, Amabily Bohn, Jefferson Prado, Regina Y. Hirai, Hanna Tuomisto, Germinal Rouhan, Paulo H. Labiak   +6 more
wiley   +1 more source

Is 30 years enough time to niche segregation between a non-native and a native congeneric fish species? Evidences from stable isotopes

Frontiers in Marine Science, 2015
The invasion of non-native species that are phylogenetically similar to native species was observed in the Upper Paraná River following the construction of the Itaipu hydroelectric plant and subsequent removal of a natural geographic barrier (Sete Quedas
Gustavo Henrique Zaia Alves
doaj   +1 more source

Changes in food‐web pathways and ecosystem functions after sidearm re‐connection in a large river (Danube, Austria)

Restoration Ecology, EarlyView.
Abstract Introduction River regulation schemes generally led to changes in riverine assemblage composition and their trophic status, which often is reflected in a general loss or decrease of characteristic species and a concomitant increase or dominance of generalist species.
Hubert Keckeis, Andrea Funk, Elisabeth Bondar Kunze, Marcel Liedermann, Michael Tritthart, David Ramler, Helmut Habersack, Thomas Hein   +7 more
wiley   +1 more source

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

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

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