Results 61 to 70 of about 4,281 (217)

Early life stages and interannual variations of fish from Canoas reservoirs, lower Paranapanema River, Brazil

ACTA OF FISHERIES AND AQUATIC RESSOURCES, 2022
Aim: To verify variations of early fish stages through density, species composition and ecological attributes in the lower Paranapanema River. Methods: The Canoas I and Canoas II reservoirs were sampled during three reproductive periods (RP´s) between 2012 and 2015. Eggs and larvae were collected using conical-cylindrical plankton nets and juveniles by
João Ferraz, Iago Geller, Diego Garcia, Alan Pereira, Mariana Pine, Lucas Jarduli, Andréa Bialetzki, Mário Orsi   +7 more
openaire   +1 more source

The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]

, 2019
The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto, Cingolani, Carlos Alberto, Etcheverry, Ricardo Oscar, Lajoinie, Maria Florencia, Lanfranchini, Mabel Elena, Recio, C., Sial, A.N.   +6 more
core   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Genetic diversity of the species Leporinus elongatus (Teleostei: Characiformes) in the Canoas Complex - Paranapanema River [PDF]

Neotropical Ichthyology, 2012
Dams constructed along waterways interrupt the dispersion and migration of aquatic organisms, affecting mainly the abundance of migratory fish species. Translocation mechanisms have been constructed at dams aiming to minimize their impact on fish species migration behavior.
Ramos, Juliano Vilas Boas, Sodré, Leda Maria Koelblinger, Orsi, Mário Luís, Almeida, Fernanda Simões de   +3 more
openaire   +4 more sources

Effects of Landscape Characteristics on Abundance of Giant Anteaters in Intensively Farmed Areas

Biotropica, Volume 57, Issue 6, November 2025.
In this study, we analyzed the abundance of giant anteaters in 55 landscapes within a 34,000 km2 region that has undergone significant transformation due to intensive agricultural practices, particularly the cultivation of sugarcane. In each landscape, we used three camera traps to record the presence of this species. Our occupancy models revealed that
Samia C. dos Reis, Larissa L. Bailey, Adriano G. Chiarello   +2 more
wiley   +1 more source

Identification and description of distinct B chromosomes in Cyphocharax modestus (Characiformes, Curimatidae)

Genetics and Molecular Biology, 2008
Cytogenetic analyses were performed in Cyphocharax modestus, collected at Paranapanema River and Tietê River (São Paulo State, Brazil). A karyotype with 2n = 54 chromosomes was observed in the animals from both Brazilian freshwater river systems.
Lessandra Viviane De Rosa Santos, Fausto Foresti, Cesar Martins, Claudio Oliveira, Adriane Pinto Wasko   +4 more
doaj   +1 more source

Spatial variation in the trophic category of fish assemblages in longitudinal stretches in a Neotropical reservoir

Anais da Academia Brasileira de Ciências, 2023
The spatial gradients created after the installation of large reservoirs produce a great diversity of biotopes, which affects the distribution and structuring of aquatic communities, mainly fish.
THIAGO D. GARCIA, BARBARA A. QUIRINO, LUCAS R. JARDULI, EDMIR D. CARVALHO, ANA PAULA VIDOTTO-MAGNONI   +4 more
doaj   +1 more source

Ecological investigation of zooplankton abundance in the river Haraz, northeast Iran: Impact of environmental variables [PDF]

, 2011
The influence of physicochemical properties of Haraz river on its zooplankton composition and abundance were investigated at three sites for one year between August 2009 and July 2010.
Akhavan Moslem, Jafari Naser, Nabavi Mohamad Saiad   +2 more
core   +1 more source

Aboveground biomass accumulation in Brazilian semi‐deciduous seasonal Atlantic Forest restoration sites over a 20‐year time series

Restoration Ecology, Volume 33, Issue 8, November 2025.
The role of forests undergoing restoration in mitigating climate change is widely accepted. However, periodic assessment of aboveground biomass (AGB) accumulation in actively restored areas is scarce, particularly in tropical forests. Here, we estimated AGB as an indicator of carbon stocks in six Atlantic Forest native species reforestations aged 4–20 ...
Giovanna G. Lemos, Fátima A. Arcanjo, José M. D. Torezan   +2 more
wiley   +1 more source

Diversity of fish species in the River Paranapanema‐Jurumirim Reservoir transition region (São Paulo, Brazil)

Italian Journal of Zoology, 1998
Abstract The diversity of fish species in an transition zone between the River Paranapanema and the head mouth of the Jurumirim Reservoir was evaluated. Fish samples were collected from October 1995 to September 1996, by experimental fishing (gill‐nets and sieve), in three marginal shallow lagoons and two channel river zones.
Carvalho, E. D., Da Silva, VFB, Fujihara, C. Y., Henry, R., Foresti, F.   +4 more
openaire   +3 more sources