Results 61 to 70 of about 4,289 (221)

Radiotagging a long-distance migratory characid fish: reproduction after surgery, tag losses, and effects in weight

Neotropical Ichthyology, 2021
Although biotelemetry studies bring useful information, tagging is a highly invasive procedure. For this reason, we assess if intracoelomic tagging alters survivorship, weight gain and/or reproductive capacity of a neotropical migratory fish.
Alexandre Peressin, João de Magalhães Lopes, Alessandra Gomes Bedore, Carlos Bernardo Mascarenhas Alves, Ivo Gavião Prado, Paulo Santos Pompeu   +5 more
doaj   +1 more source

Role of glucose in enhancing life and potency of Cirrhinus mrigala spermatozoa during cryopreservation [PDF]

, 2015
Cryopreservation of fish gametes is an emerging technology and breeding with cryopreserved gametes is advancement in fish seed production. Success of cryopreservation is evaluated by the post - thaw motility of the spermatozoa, an for which energy is ...
Betsy, C. Judith, Kumar, J. Stephen Sampath, Rajagopalasamy, C. B. T.   +2 more
core   +2 more sources

Estudios ictiologicos en la laguna La Cuarentena (Isla Carabajal), rio Parana, Argentina : edad y crecimiento del "sabalo" (Prochilodus lineatus (Val.), periodo 1984-1985 (Pisces, Curimatidae) [PDF]

, 1991
L'objectif est de connaître l'âge et la croissance du #Prochilodus lineatus$ dans la lagune La Cuarentena (31°45'15"S - 60°37'30"W) et d'établir des comparaisons avec d'autres milieux lenitiques et lotiques du Parana moyen, les échantillons ont été ...
Carozza, C., Cordiviola de Yuan, E.
core  

The effects of endosulfan on P450 1A gene expression, antioxidant enzymes activity and histopathological alterations in liver of Persian sturgeon (Acipenser persicus Borodin, 1987) [PDF]

, 2016
The effects of 14 days exposure to sublethal concentrations of endosulfan (10 and 40 μg L−1) were investigated in mRNA- P450 1A expression, antioxidant enzymes (SOD and CAT) activity and histopathological alterations of Persian sturgeon (Acipenser ...
Khalili, M., Pourkazemi, M., Reza Imanpour, M., Safari, R.   +3 more
core   +1 more source

Desempeno del sabalo Prochilodus lineatus en policultivo con pacu Piaractus mesopotamicus

Latin American Journal of Aquatic Research, 2016
In fish farming 30% of the nutrients provided are retained as animal biomass, and the remainder is lost in the sediments. An alternative is to produce in polyculture, to take advantage of space and food. The aim of this work was to compare and evaluate the growth of Prochilodus lineatus (PL) in monoculture, in contrast to polyculture of PL and pacu ...
Della Rosa, Paola, Ortiz, Julio C, Cáceres, Antonio de la C, Sánchez, Sebastián, Roux, Juan P   +4 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

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

Population genetic structuring in pacu (Piaractus mesopotamicus) across the Paraná-Paraguay basin: evidence from microsatellites [PDF]

, 2009
The Paraná-Paraguay basin encompasses central western Brazil, northeastern Paraguay, eastern Bolivia and northern Argentina. The Pantanal is a flooded plain with marked dry and rainy seasons that, due to its soil characteristics and low declivity, has a ...
CALCAGNOTTO, Daniela, DESALLE, Rob
core   +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

Acute morphological and physiological effects of lead in the neotropical fish Prochilodus lineatus

Brazilian Journal of Biology
The present study investigated lead effects on gill morphology, hematocrit, blood sodium, glucose, lipids, protein, and cholesterol of Prochilodus lineatus exposed to two sublethal lead concentrations for 96 h.
C. B. R. Martinez, M. Y. Nagae, C. T. B. V. Zaia, D. A. M. Zaia   +3 more
doaj   +1 more source