Results 51 to 60 of about 744 (155)

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

A new species of Aphanoblastella (Monogenea: Dactylogyridae) parasitic on Rhamdia quelen (Siluriformes: Heptapteridae) from Southeastern Brazil = Nova espécie de Aphanoblastella (Monogenea: Dactylogyridae) parasito de Rhamdia quelen (Siluriformes: Heptapteridae) do sudeste do Brasil

Acta Scientiarum: Biological Sciences, 2009
Aphanoblastella juizforense sp. nov. is described in the gills of the heptapterid fish Rhamdia quelen (Quoy et Gaimard, 1824) from the Paraibuna River, Juiz de Fora, Minasn Gerais State, Brazil.
Adriano Reder de Carvalho, Luiz Eduardo Roland Tavares, José Luis Luque   +2 more
doaj  

Hematological and morphometric blood value of four cultured species of economically important tropical foodfish

Neotropical Ichthyology
The use and validation of fish health monitoring tools have become increasingly evident due to aquaculture expansion. This study investigated the hematology and blood morphometrics of Piaractus mesopotamicus, Brycon orbignyanus, Oreochromis niloticus and
Genoefa Amália Dal'Bó, Fernanda Garcia Sampaio, Marcos Eliseu Losekann, Julio Ferraz de Queiroz, Alfredo José Barreto Luiz, Verena Hildegard Gyárfas Wolf, Vitória Teodoro Gonçalves, Maria Lidia Carra   +7 more
doaj   +1 more source

INCLUSÃO DE DIFERENTES FONTES DE AMIDO NA DIETA DE JUNDIÁS (Rhamdia quelen): PARÂMETROS METABÓLICOS E BIOQUÍMICOS

Ciência Animal Brasileira, 2013
This study was conducted to evaluate the influence of ingestion of different sources of starch on enzymatic and metabolic indicators in blood and liver of Rhamdia quelen. The experiment was conducted during 20 days in water recirculation system.
Naglezi de Menezes Lovatto, Fernanda Rodrigues Goulart, Viviani Correia, Cristiano Costenaro Ferreira, Leila Picolli da Silva, João Radünz Neto   +5 more
doaj   +1 more source

Freqüência alimentar e crescimento de alevinos de jundiá, Rhamdia quelen [PDF]

Ciência Rural, 2005
O jundiá, Rhamdia quelen, é uma espécie de peixe nativa ainda pouco conhecida cientificamente, mas que tem atraído a atenção de produtores e pesquisadores devido a várias características favoráveis à sua inclusão na lista de peixes criados comercialmente
Paulo César Falanghe Carneiro, Jorge Daniel Mikos   +1 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

Cephalic Musculature of the Pacman Catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes, Pseudopimelodidae)

Journal of Morphology, Volume 286, Issue 5, May 2025.
The head of the Pacman catfish (Lophiosilurus alexandri [L. alexandri]) is strongly depressed, broad, and with a large mouth, roughly resembling those of Lophius piscatorius and Chaca bankanensis. Also, they are bottom dwellers and have ambush behavior for fish predation.
Rafael da Silva Marques, Isabela Ohara, Oscar Akio Shibatta   +2 more
wiley   +1 more source

Acute toxicity test of agricultural pesticides on silver catfish (Rhamdia quelen) fingerlings Teste de toxicidade aguda de pesticidas agrícolas em alevinos de jundiás (Rhamdia quelen)

Ciência Rural, 2008
Toxicity risks of agricultural pesticides to fishes are pivotal. Currently, many questions remain unsolved regarding to the toxicity of commonly used pesticides to silver catfish (Rhamdia quelen), a South American catfish.
Luiz Carlos Kreutz, Leonardo José Gil Barcellos, Tális Oliveira Silva, Deniz Anziliero, Daiana Martins, Monique Lorenson, Ariane Marteninghe, Leonardo Bolognese da Silva   +7 more
doaj   +1 more source

Biologia reprodutiva e desova induzida de duas espécies de bagres (Osteichthyes: Siluriformes) da bacia do rio São Francisco = Reproductive biology and induced spawning of two catfish species (Osteichthyes: Siluriformes) from the São Francisco river basin

Acta Scientiarum: Biological Sciences, 2006
Rhamdia quelen e Pseudopimelodus charus são dois bagres que atingem porte acima de 2 kg. Espécimes receberam dose única de extrato bruto de hipófise de carpa comum EBHC (2,5 mg kg-1 de peixe nos machos e 6 mg kg-1 de peixe nas fêmeas).
Edson Vieira Sampaio, Yoshimi Sato
doaj  

Subchronic effects of dipyrone on the fish species Rhamdia quelen

Ecotoxicology and Environmental Safety, 2011
The use of the non-steroidal anti-inflammatory drugs such as dipyrone is so widespread that this drug and its metabolites have been detected in effluents and surface water. This study aimed to evaluate the potential toxic effects of dipyrone on the aquatic environment, using a native fish species, Rhamdia quelen.
J H, Pamplona, E T, Oba, T A, da Silva, L P, Ramos, W A, Ramsdorf, M M, Cestari, C A Oliveira, Ribeiro, A R, Zampronio, H C Silva, de Assis   +8 more
openaire   +2 more sources