Results 81 to 90 of about 2,121 (199)

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract [PDF]

International Journal of Morphology, 2017
The present study describes the morphology and histology of the digestive tract of juvenile pirarucu, which is a Neotropical fish species with great potential for aquaculture in the Amazon region. Three size classes of pirarucu juveniles from commercial fish farms were sampled for histological examination of the oesophagus, stomach, pyloric caeca ...
Rodrigues, Ana Paula Oeda, Cargnin-Ferreira, Eduardo   +1 more
openaire   +2 more sources

Dietary Probiotics Improve Growth, Immunity and Disease Resistance in Fish Against Aeromonas hydrophila Infection

Aquaculture, Fish and Fisheries, Volume 6, Issue 2, April 2026.
Probiotics offer a promising alternative to antibiotics for managing Aeromonas hydrophila infections in aquaculture. Dietary supplementation of probiotics increases fish health, growth performance, and immune responses, while reducing antibiotic reliance in fish farming.
Md. Ridwanul Islam, Md. Adnan Sajib, Nurunnahar Nadira, Alokesh Kumar Ghosh   +3 more
wiley   +1 more source

Evidence of polygamy in the socially monogamous Amazonian fish Arapaima gigas (Schinz, 1822) (Osteoglossiformes, Arapaimidae)

Neotropical Ichthyology
Arapaima gigas is one of the largest freshwater fishes of the world. It is socially monogamous, forming pairs, constructing a nest and providing parental care.
Izeni Pires Farias, Adam Leão, Yane Santos Almeida, Júlia Tovar Verba, Marcelo Crossa M., Alexandre Honczaryk, Tomas Hrbek   +6 more
doaj   +1 more source

Unravelling the life history of Amazonian fishes through otolith microchemistry [PDF]

Royal Society Open Science, 2016
Amazonian fishes employ diverse migratory strategies, but the details of these behaviours remain poorly studied despite numerous environmental threats and heavy commercial exploitation of many species.
Theodore W. Hermann, Donald J. Stewart, Karin E. Limburg, Leandro Castello   +3 more
doaj   +1 more source

Exploring ecohydrology through the lens of local fishers in the Bolivian Amazon

Ecosphere, Volume 17, Issue 4, April 2026.
Abstract The natural flow regimes of Andean‐Amazon tributaries play a vital role in sustaining their rich biodiversity and productive local fisheries, but ongoing and proposed alteration of river flow regimes by large dams threatens to negatively impact river ecosystems. Despite its importance, our understanding of how hydrologic variability influences
Lina G. Terrazas‐Villarroel, Jochen Wenninger, Marcelo Heredia‐Gómez, Nick van de Giesen, Michael E. McClain   +4 more
wiley   +1 more source

Tensile Properties of 3D‐Printed Porous Bouligand Structured Polymer Plates

Macromolecular Materials and Engineering, Volume 311, Issue 4, April 2026.
The tensile performance of porous Bouligand‐structured polymers is governed by pitch angle and fiber spacing. Experimental and FEA results reveal optimal strength and stiffness at 30∘$^\circ$, with mechanical efficiency scaling with density. These tunable bioinspired architectures bridge cellular solids and composites, offering lightweight, damage ...
Praveenkumar Subhash Patil, Edward D. McCarthy, Parvez Alam   +2 more
wiley   +1 more source

Unprotected Waters: When Protection Fails In Freshwater

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 3, March 2026.
ABSTRACT Invasive species are a major driver of biodiversity loss in protected areas (PAs), yet their impacts in aquatic environments are less well documented. This study investigated the occurrence and distribution of nonnative freshwater fish in federal PAs in Brazil.
Aymar Orlandi Neto, Éder André Gubiani, Igor Paiva Ramos   +2 more
wiley   +1 more source

Scanning x-ray fluorescence microscopy data for Arapaima sp.

, 2016
Scanning x-ray fluorescence microscopy raw data (drift-corrected) for Arapaima sp., including Ca, Zn, and Sr.
Donald J. Stewart (2912312), Karin E. Limburg (497824), Leandro Castello (3259857), Theodore W. Hermann (3259854)   +3 more
core   +1 more source

Tectonostratigraphic Evolution of the Guyana Basin: Implications for Sediment Routing and Slope Stability

Basin Research, Volume 38, Issue 2, March–April 2026.
Seismic profile across the Guyana Basin showing the main tectonostratigraphic units and an order‐of‐magnitude increase in sedimentation rates since the Middle Miocene corresponding with the onset of sedimentation dominated by mass transport deposits. ABSTRACT The Guyana Basin developed in an evolving tectonic setting, but a lack of subsurface data has ...
Deron Saul, Uisdean Nicholson
wiley   +1 more source

Estudos de cestóides de peixes do Brasil

Memorias do Instituto Oswaldo Cruz, 1974
Os autores iniciam com este trabalho um estudo sistemático de determinação dos cestóides de peixes depositados na Coleção helmintológica do Instituto Oswaldo Cruz.
A. Arandas Rego, Julio C. dos Santos, Paulo P. Silva   +2 more
doaj   +1 more source