Results 41 to 50 of about 469 (179)

Genetic diversity of migratory fish populations of the Rio Grande Reservoir (São Paulo, Brazil)

Semina: Ciências Agrárias, 2019
In recent years, anthropogenic factors such as pollution, overfishing, and construction of hydroelectric plants have significantly impacted natural fish populations. Research focusing on genetically evaluation of these impacts is necessary to objectively
Nelson Mauricio Lopera-Barrero, Felipe Pinheiro de Souza, Ed Christian Suzuki de Lima, Angela Maria Urrea-Rojas, Pedro Luiz de Castro, Elenice Souza dos Reis Goes, Victor César Freitas Pandolfi, Andrei Lincoln Yamachita, Carlos Antonio Lopes de Oliveira, Natália Gonçalves Leite, Ricardo Pereira Ribeiro   +10 more
doaj   +1 more source

First evidence of a spawning site of the endangered fish Brycon orbignyanus (Valenciennes, 1850) (Characiformes, Bryconidae) in the Middle Uruguay River, Brazil

Acta Limnologica Brasiliensia, 2020
: Aim This study provides the first direct evidence about the location of a spawning site of Brycon orbignyanus (Valenciennes, 1850) in the Middle Uruguay River.
David Augusto Reynalte-Tataje, Marlon da Luz Soares, Marthoni Vinicius Massaro, Rodrigo Bastian, Fernando Mayer Pelicice   +4 more
doaj   +1 more source

Reprodução em cativeiro de piracanjuba Brycon orbignyanus assistida por marcador molecular como estratégia de conservação [PDF]

, 2014
The freshwater fauna of fish in Brazil is particularly diverse and a lot of these species that compose it are not naturally found elsewhere. Such diversity has a high number of stocks in natural watercourses, which have suffered significant reduction as ...
Oliveira, Daniela José de
core   +4 more sources

Optimization of heterologous microsatellites in Piracanjuba

Pesquisa Agropecuária Brasileira, 2015
: The objective of this work was to evaluate 41 microsatellite markers for heterologous amplifications in piracanjuba (Brycon orbignyanus). Some markers were tested for the first time.
Fausto Moreira da Silva Carmo, Érico Macedo Polo, Marcos Antônio da Silva, Gabriel de Menezes Yazbeck   +3 more
doaj   +1 more source

Fish Sperm Subpopulations Detection, Separation, and Application: Current State and Trends

Reviews in Aquaculture, Volume 18, Issue 4, September 2026.
Modern advances in sperm biology highlight the necessity of recognising intra‐ejaculate heterogeneity as a central concept for advancing both the fundamental understanding of fertilisation processes and the development of artificial reproduction techniques in fishes. ABSTRACT Sperm subpopulations represent a fundamental manifestation of intra‐ejaculate
Viktoriya Dzyuba, William V. Holt, Borys Dzyuba   +2 more
wiley   +1 more source

Genetic Structure and Conservation Strategies for the Endangered Catfish Steindachneridion melanodermatum (Siluriformes, Pimelodidae) in the Iguaçu River, Brazil

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 6, June 2026.
ABSTRACT The endemic catfish Steindachneridion melanodermatum from the Iguaçu River basin, southern Brazil, is one of the most threatened pimelodid species. Comprehension of its genetic structure is imperative to the formulation of long‐term efficacious conservation strategies. A genetic analysis was conducted on three populations from the lower Iguaçu
Jesús Hernández‐Gómez, Caio Felipe da Silva, Carolina de Oliveira Magalhães, Bruno Henrique Mattiello, Juliano Tupan Coragem, Ricardo Utsunomia, Fabio Porto‐Foresti, Fernanda Dotti do Prado, Roberto Ferreira Artoni   +8 more
wiley   +1 more source

Fig. 4 in Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction [PDF]

, 2019
Fig. 4. Ontogenetic variations in the diet of Brycon orbignyanus in the Upper Paraná River floodplain. FI = fish; AI = aquatic invertebrates; TI = terrestrial invertebrates; TP = terrestrial plants; AP = aquatic plants.Published as part of Tonella, Lívia
Dias, Rosa Maria, Junior, Oscar Barroso Vitorino, Fugi, Rosemara, Agostinho, Angelo Antonio, Tonella, Lívia Helena   +4 more
core   +1 more source

Monitoring of Salmonella spp. in Native Fish Farms in the Pantanal and Cerrado Biomes, Brazil: Serotype Diversity, Antimicrobial Resistance Profiles, and Multivatiate Patterns 

Journal of Food Safety, Volume 45, Issue 6, December 2025.
This study investigated Salmonella spp. occurrence, serotypes, antimicrobial resistance, and associated environmental and management factors in 25 native fish farms located in the Pantanal and Cerrado biomes, Brazil. A total of 184 fish and environmental samples were analyzed using standardized methods and multivariate statistics. Salmonella spp.
Yuri Duarte Porto, Fabíola Helena dos Santos Fogaça, Wagner de Souza Tassinari, Adriana Oliveira Andrade, Adelino Cunha Neto, Luciano Carlos de Arruda, Jaqueline Oliveira dos Reis, Janine Passos Lima, Luciana Kimie Savay‐da‐Silva, Eduardo Eustáquio de Souza Figueiredo   +9 more
wiley   +1 more source

Diversidad genética de piracanjuba usada en programas de repoblación con marcadores microsatélites Genetic diversity of piracanjuba used in stock enhancement programs with microsatellite markers

Pesquisa Agropecuária Brasileira, 2010
El objetivo de este trabajo fue estimar la diversidad genética de un lote de Brycon orbignyanus usado en programas de repoblación, a través de marcadores microsatélites.
Maria del Pilar Rodriguez-Rodriguez, Nelson Mauricio Lopera-Barrero, Ricardo Pereira Ribeiro, Jayme Aparecido Povh, Lauro Vargas, Rodolfo Nardez Sirol, Carolina Bespalhok Jacometo   +6 more
doaj   +1 more source

Low‐Effort eDNA Sampling Reveals Fish Community Patterns in a Neotropical River Basin

Environmental DNA, Volume 7, Issue 4, July–August 2025.
Low eDNA sampling effort (< 10 sample sites) using a portable on‐site kit with syringe filters and a modest water volume (< 500 mL per site) provided a rapid and robust snapshot of fish biodiversity. Environmental DNA based species richness increases along the upstream‐downstream gradient showing a significant negative correlation with river elevation ...
Daniel Cardoso Carvalho, Heron Oliveira Hilário, Igor Henrique Nascimento, Guilherme Costa Berger, Paulo Santos Pompeu   +4 more
wiley   +1 more source