Results 31 to 40 of about 251 (129)

A traíra Hoplias aff. malabaricus (Bloch, 1794) na planície de inundação do alto rio Paraná : influência sobre as assembléias de peixes e aspectos da auto-ecologia. [PDF]

, 2005
Cap.1: This study tested experimentally the hypothesis that traíra Hoplias aff. malabaricus is a keystone predator in isolated lagoons of the upper Paraná River floodplain.
Ana Cristina Petry
openalex   +2 more sources

Aquatic and Terrestrial Invertebrates Support Fish Assemblages of Amazonian Streams

Freshwater Biology, Volume 71, Issue 5, May 2026.
ABSTRACT The Amazonian stream network is remarkable not only for its extent but also for its rich fish diversity. These streams are interconnected with the surrounding forests. However, key ecological aspects of Amazonian freshwater ecosystems, such as energy flows and carbon sources sustaining fish assemblages, remain poorly understood. In this study,
Pedro H. S. Basilio, Cecília G. Leal, Débora R. de Carvalho, Gabriel L. Brejão, Dennys H. C. Drager, Gilberto N. Salvador, Marcos A. Alves‐Filho, Vladimir E. Costa, Gabriel O. Ferraz, Gustavo S. Ferreira, Rafael P. Leitão, Luciano F. A. Montag, Jady V. A. S Santos, Everton C. Silva, Paulo S. Pompeu   +14 more
wiley   +1 more source

Effects of flooding regime on the feeding activity and body condition of piscivorous fish in the Upper Paraná River floodplain Efeitos do regime de cheias sobre a atividade alimentar e condição corporal de peixes piscívoros na planície de inundação do Alto Rio Paraná

Brazilian Journal of Biology, 2009
Flood pulses affect floodplain enrichment via the incorporation of nutrients and terrestrial biomass. As a result, they positively affect the body condition of aquatic organisms.
KDG. Luz-Agostinho, AA. Agostinho, LC. Gomes, HF. Júlio-Jr., R. Fugi   +4 more
doaj   +1 more source

Anthropogenic Factors Drive the Depletion of Fish Functional Β Diversity Within and Outside Two National Reserves in the Peruvian Amazon

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 12, December 2025.
ABSTRACT Understanding the impact of human activities on fish communities is critical for the effective conservation of Amazonian ecosystems. In this study, we sampled environmental DNA (eDNA) from 17 sites (lakes and rivers) in two Peruvian national reserves, Pacaya‐Samiria and Allpahuayo‐Mishana, using a metabarcoding approach with four genetic ...
B. Prat, C. Mariac, J.‐F. Renno, C. García‐Dávila, C. Angulo, G. Estivals, F. Duponchelle   +6 more
wiley   +1 more source

Fig. 2 in Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)

, 2011
Fig. 2. Average daily water temperatures registered at Yalca Lake during an annual cycle (a), and frequency distribution of the average daily temperatures (b).Published as part of Balboni, Leandro, Colautti, Dario César & Baigún, Claudio Rafael Mariano ...
Baigún, Claudio Rafael Mariano, Colautti, Dario César, Balboni, Leandro   +2 more
core   +1 more source

The Role of Fish in Nutrient Recycling Across a Conservation Gradient in Neotropical Streams

Freshwater Biology, Volume 70, Issue 10, October 2025.
ABSTRACT Fish play a crucial role in nutrient recycling within various aquatic ecosystems, but how their contribution varies across streams with different levels of disturbance remains poorly understood. In our study, we investigated the role of fish assemblage in nutrient cycling within eight Neotropical streams characterised by varying degrees of ...
Ronny José de Morais, Gaston E. Small, Samantha Salomão Caramori, Fabrício Barreto Teresa   +3 more
wiley   +1 more source

Effects of temperature on prey consumption and growth in mass of juvenile trahira Hoplias aff. malabaricus (Bloch, 1794) [PDF]

, 2018
PETRY, Ana Cristina; AGOSTINHO, Angelo Antonio; PIANA, Pitágoras Augusto; GOMES, Luiz Carlos. Effects of temperature on prey consumption and growth in mass of juvenile trahira Hoplias aff. malabaricus (Bloch, 1794).
PETRY, A.C.; AGOSTINHO, A.A.; PIANA, P.A.; GOMES, L.C.
core  

Illuminating the Dark: Using eDNA Metabarcoding to Study the Unique Ichthyofauna of the Furnas Formation Sinkholes

Environmental DNA, Volume 7, Issue 4, July–August 2025.
Using eDNA metabarcoding, we assessed fish diversity in isolated sinkholes in southern Brazil, uncovering signs of local extinction and species persistence. This approach offers a non‐invasive tool for biodiversity assessment and informs conservation efforts in unique karst environments.
Luz E. De la Ossa‐Guerra, Daniel M. Limeira, Roger H. Dalcin, Heron O. Hilário, Daniel C. Carvalho, Roberto F. Artoni   +5 more
wiley   +1 more source

Neotropical Monogenoidea. 23. Two new species of Gyrodactylus (Gyrodactylidae) from a Cichlid and an Erythrinid fish of Southeastern Brazil

Memorias do Instituto Oswaldo Cruz, 1995
Two new species of Gyrodactylus Nordmann, 1832 (Platyhelminthes, Monogenoidea) are described from fishes collected from southeastern Brazil. Gyrodactylus geophagensis n. sp.
Walter A. Boeger, Flávio Popazoglo
doaj   +1 more source

Assessing fish diversity in abandoned mining ponds in Madre de Dios, Peru, using environmental DNA

Environmental DNA, Volume 6, Issue 1, January–February 2024.
We surveyed four lentic systems in Madre de Dios, Peru: two abandoned mining ponds created by ASGM and two unmined oxbow lakes as a reference to assess fish recolonization. We compared two alternative eDNA processing methods and contrasted our results with historic data from traditional biodiversity monitoring. Our results indicate that eDNA could be a
Camila Timana‐Mendoza, Alonso Reyes‐Calderon, Patrick Venail, Julio M. Araújo‐Flores, Mónica C. Santa‐Maria   +4 more
wiley   +1 more source