Results 51 to 60 of about 3,430 (184)

Glicosí­­metro portátil como ferramenta alternativa para monitoramento da glicose sanguí­­nea em lambaris Astyanax altiparanae: efeitos do estresse e sexo

open access: yesBoletim do Instituto de Pesca, 2017
A eficácia do medidor portátil de glicemia (Accu-Chek Active®) foi avaliada em lambaris adultos (Astyanax altiparanae), comparando-se os valores registrados aos obtidos por meio do método enzimático laboratorial. A glicemia de machos e fêmeas adultos e
Elyara Maria PEREIRA-DA-SILVA   +1 more
doaj   +1 more source

Life‐History and Landscape Context Shaping the Spatial Genetic Structure of the Migratory Amazonian Fish Prochilodus nigricans

open access: yesFreshwater Biology, Volume 71, Issue 6, June 2026.
ABSTRACT The Neotropical migratory fish Prochilodus nigricans plays a critical ecological and socioeconomic role in the Amazon basin. Nevertheless, little is known about its populations and the genetic diversity pattern of the species. In light of this, the current study investigates the spatial genetic structure and diversity of P.
Ueslei Lopes   +5 more
wiley   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

open access: yesGeostandards and Geoanalytical Research, Volume 50, Issue 2, Page 369-389, June 2026.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro   +7 more
wiley   +1 more source

Guerra-Peixe

open access: yesPer Musi
In this paper we examine the meaning of “folkloric objectivity” (and, thus, of direct folklore and diluted folklore), an expression coined by Brazilian composer César Guerra-Peixe (1914-1993) between the 1950s and 1970s. Attempting to detect the presence of folklore in his compositions for the classic guitar, we also consider the genesis of the works ...
openaire   +1 more source

Integrative taxonomy reveals four new species of the armoured catfish genus Pareiorhina (Siluriformes: Loricariidae) from the upper Paraná River basin, Brazil

open access: yesJournal of Fish Biology, Volume 108, Issue 6, Page 1906-1933, June 2026.
Abstract Four new species of the small‐sized armoured catfish genus Pareiorhina are described from mountain ranges in the Grande River drainage, upper Paraná River basin, based on morphological and molecular species delimitation methods. Molecular analyses based on the cytochrome oxidase subunit I (COI) marker recovered Pareiorhina as polyphyletic ...
Pedro L. C. Uzeda   +6 more
wiley   +1 more source

Caracterí­­sticas morfométricas e rendimento corporal do suruvi Steindachneridion scriptum agrupados por sexo

open access: yesBoletim do Instituto de Pesca, 2018
A determinação do formato do corpo, razões morfométricas e rendimento corporal é importante para a caracterização das espécies e avaliação do seu potencial produtivo.
Otavio Rechsteiner MAGHELLY   +3 more
doaj  

FISH PREDATORS OF THE GOLDEN MUSSEL Limnoperna fortunei IN DIFFERENT ENVIRONMENTS IN A SOUTH AMERICAN SUBTROPICAL RIVER

open access: yesBoletim do Instituto de Pesca, 2019
This study aimed to evaluate whether the golden mussel, Limnoperna fortunei, identified in the upper Uruguay River for the first time in 2012, has been incorporated into the diet of the ichthyofauna present in different environments of a Neotropical ...
Sunshine de Ávila-Simas   +2 more
doaj   +1 more source

Integrative taxonomy reveals two new species of whiptail catfishes Loricaria (Siluriformes: Loricariidae) from northeastern Brazil

open access: yesJournal of Fish Biology, Volume 108, Issue 6, Page 2080-2097, June 2026.
Abstract Two new species of whiptail catfish, Loricaria (Siluriformes: Loricariidae), were discovered in the Munim and Itapecuru river basins, Maranhão State, northeastern Brazil, through an integrative taxonomic approach combining morphology and mitochondrial DNA.
Ananda. C. Serejo‐Saraiva   +4 more
wiley   +1 more source

Crescimento e sobrevivência de larvas de suruvi Steindachneridion scriptum nos primeiros dias de vida: influência de diferentes alimentos e fotoperí­­odos

open access: yesBoletim do Instituto de Pesca, 2018
O objetivo deste estudo foi avaliar o crescimento e a sobrevivência das larvas de suruvi, Steindachneridion scriptum, com a utilização de quatro tipos de alimento (larvas de Prochilodus lineatus, Artemia sp., farinha de peixe e ração com 40% de proteí ...
Jackson Haroldo SCHÜTZ   +3 more
doaj  

Diagnóstico da pesca artesanal na usina hidrelétrica de Machadinho, alto Rio Uruguai - Brasil

open access: yesBoletim do Instituto de Pesca, 2018
O reservatório de Machadinho, formado no ano de 2001, está localizado na região do alto rio Uruguai. Procurando diagnosticar a pesca neste reservatório, assim como a composição ictiofauní­­stica ao longo dos anos após o represamento foram aplicados ...
Gianfrancisco SCHORK   +4 more
doaj  

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