Results 61 to 70 of about 304 (125)

Seasonal Forest Resources Support Fish Biomass in Floodplain Lakes of an Amazonian Tributary

Freshwater Biology, Volume 70, Issue 11, November 2025.
ABSTRACT The Flood Pulse Concept is a foundational ecological theory that emphasizes the critical role of lateral connectivity between a river channel and its floodplain. Many tropical rivers inundate the surrounding floodplain in the flood stage, thereby receiving large amounts of terrestrial organic matter that can be decomposed by microbes and ...
Timothy D. Jardine, Francisco Villamarín, Joseph E. Hawes, Joao Campos‐Silva, Cristina M. Jacobi, Stephen Srayko, Alexander Pelletier, William E. Magnusson   +7 more
wiley   +1 more source

Larvas de nematóides de importância zoonótica encontradas em traíras (Hoplias malabaricus bloch, 1794) no município de Santo Antonio do Leverger, MT Nematode larvae with zoonotical importance found in trairas (Hoplias malabaricus) in Santo Antonio do Leverger, Mato Grosso, Brazil

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2007
In order to investigate the prevalence of nematode larvae with zoonotical importance in trairas (Hoplias malabaricus), necropsy exams were done 30 specimes from Santo Antonio do Leverger, Mato Grosso, Brazil.
L.A. Barros, J. Moraes Filho, R.L. Oliveira   +2 more
doaj   +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

Primeiro registro de albinismo em traí­­ra Hoplias malabaricus no Brasil

Boletim do Instituto de Pesca, 2018
Este trabalho é o primeiro registro de ocorrência de uma fêmea adulta de traí­­ra, Hoplias malabaricus, capturada no estado de Pernambuco, que apresentou caracterí­­sticas de albinismo total.
Tatiene Rossana Móta SILVA, Thiago André Tavares de ARAÚJO, Álvaro José de Almeida BICUDO   +2 more
doaj  

Length-weight relationship of trahira Hoplias aff. malabaricus (Bloch, 1794) in a regulated stream of southern Brazil

Biotemas, 2016
This paper presents an allometric study of the length-weight relationship of Hoplias aff. malabaricus collected in the Chasqueiro Reservoir and Stream in southern Brazil. During the study, 112 specimens were collected with total lengths ranging from 124
Fabiano Corrêa, Edson Fontes De Oliveira, Juvêncio Pouey, Sérgio Piedras   +3 more
doaj   +1 more source

Performance of eDNA Filtration Methods for Monitoring Fish Diversity in a Hyper‐Tidal Estuary

Environmental DNA, Volume 7, Issue 5, September–October 2025.
This study evaluates four eDNA filtering methods, three manual filters (0.45, 1.2, and 5 μm) and a passive method, the metaprobe, across a salinity gradient in a hyper‐tidal estuarine ecosystem. Results show that the 0.45 μm filter detected the highest species richness (39 species), followed by the metaprobe (35 species), and the 1.2 μm (34 species ...
Jake M. Jackman, Naiara Guimarães Sales, Chiara Benvenuto, Andrea Drewitt, Andrew Wolfenden, Peter E. Robins, Ilaria Coscia, Allan D. McDevitt   +7 more
wiley   +1 more source

Effects of dietary methylmercury on liver and kidney histology in the neotropical fish Hoplias malabaricus

Ecotoxicology and Environmental Safety, 2007
Methylmercury is a potent toxic present in Amazonian fish species due to gold mining activities. In the present work, we investigated the morphological effects of methylmercury in liver and kidney of Hoplias malabaricus feeding contaminated prey fish over 70 days.
M, Mela, M A F, Randi, D F, Ventura, C E V, Carvalho, E, Pelletier, C A, Oliveira Ribeiro   +5 more
openaire   +2 more sources

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

The fish fauna in tropical rivers: The case of the Sorocaba river basin, SP, Brazil

Revista de Biología Tropical, 2003
A survey was carried out on the fish species in the Sorocaba River basin, the main tributary of the left margin of the Tietê River, located in the State of São Paulo, Brazil. The species were collected with gill nets.
Welber Senteio Smith, Miguel Petrere, Walter Barrella   +2 more
doaj  

Antagonistic Rewiring and Turnover Patterns in a Neotropical Fish–Parasite Metanetwork

Freshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT Integrating beta‐diversity and network analyses is an emerging approach for understanding the spatial structure of species communities. For instance, although the presence of hosts affects parasite species distribution, environmental factors can either restrict or promote the occurrence of certain parasite species by changing the abundance of ...
Ana Paula Lula Costa, Paulo R. Guimarães, Andre A. Padial   +2 more
wiley   +1 more source