Results 41 to 50 of about 582 (123)

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

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

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

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

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  

Larger Fish Upstream: Testing the Drivers of Fish Longitudinal Size Distribution in a Stream

Freshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT The “larger fish upstream pattern” (LFUP), where fish size increases from river mouths toward headwaters, is widely documented, but the drivers remain unclear. Here, we tested whether LFUP is related to species reproductive strategies or environmental factors (differential growth, predation, competition). Using historical data (1994–1998) from
Pedro Wolf, Piatã Marques, Rosana Mazzoni   +2 more
wiley   +1 more source

Long‐Term Effects of Land Use and Cover Change and Dam Rupture on Ichthyofauna in a Neotropical Stream

International Review of Hydrobiology, Volume 110, Issue 1, Page 5-12, June 2025.
ABSTRACT This study evaluates land use and land cover (LULC) changes and their impacts on the fish community of a neotropical stream in the Sorocaba River basin, Brazil, from 2006 to 2023. The watershed experienced landscape changes over time, categorized into four periods: rural interventions, urban interventions, restorative interventions, and post ...
Nícholas de P. Nicomedes, Thiago M. R. Santos, Luís G. N. de Carvalho, Beatriz C. G. Prieto, Camila S. Bento, Larissa L. M. Silva, Flavia C. de Paiva, Natalia S. Alves, Welber S. Smith   +8 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  

LEVANTAMENTO PARASITOLÓGICO EM Hoplias Malabaricus, Bloch, (1794) (TRAIRA) DE ÁGUAS DA REGIÃO DE SANTA MARIA - RS

Ciência Rural, 1992
No presente trabalho estudou-se os parasitos encontrados em 139 traíras coletadas nas diferentes estações do ano em lagoas e açudes do município de Santa Maria, RS.
Ana Maria Weiblen, Deodoro Atlante Brandão   +1 more
doaj   +1 more source

Distribution pattern of two fish species in a coastal stream in Southeast Brazil

Brazilian Journal of Biology
Longitudinal distribution of Mimagoniates microlepis and Hoplias malabaricus was analyzed in a coastal stream system in Southeast Brazil. Six sites were sampled by electrofishing in seven months, from July 94 to July 95. Densities of M. microlepis, and H.
R. MAZZONI, R. IGLESIAS-RIOS
doaj   +1 more source