Results 51 to 60 of about 4,832 (194)

Oxygen consumption from air and water, ammonia and urea‐N excretion, and Na+ fluxes during progressive aquatic hypoxia in Amazonian armoured catfish Pterygoplichthys gibbiceps and Pterygoplichthys pardalis

Journal of Fish Biology, EarlyView.
Abstract The Amazonian loricariid fish Pterygoplichthys gibbiceps, from the Rio Negro, and Pterygoplichthys pardalis, from the Rio Solimões, are facultative air‐breathers that can use the stomach as an air‐breathing organ. Measurement of oxygen uptake under progressive aquatic hypoxia revealed a relatively high hypoxia resistance of both species.
Bernd Pelster, Chris M. Wood, Adalberto Luis Val   +2 more
wiley   +1 more source

Camallanus tridentatus (Drasche) (Nematoda: Camallanidae): new taxonomically important morphological data

Memorias do Instituto Oswaldo Cruz, 2009
Camallanus tridentatus is redescribed on the basis of the examination of specimens obtained from the stomach, caeca and intestine of the naturally infected arapaima Arapaima gigas (Schinz) from the Mexiana Island, Amazon River Delta, Brazil.
Cláudia Portes Santos, František Moravec   +1 more
doaj   +1 more source

Perspectivas da produção comercial do pirarucu. [PDF]

, 2019
Diversos grupos de pesquisa de vários países da Bacia Amazônica vêm desenvolvendo pesquisas com o pirarucu, Arapaima gigas, devido principalmente a seu crescimento rápido e a grande demanda por sua carne.
CRESCÊNCIO, R.
core  

Extensive Karyotype Reorganization in the Fish Gymnotus arapaima (Gymnotiformes, Gymnotidae) Highlighted by Zoo-FISH Analysis. [PDF]

, 2018
The genus Gymnotus (Gymnotiformes) contains over 40 species of freshwater electric fishes exhibiting a wide distribution throughout Central and South America, and being particularly prevalent in the Amazon basin.
Ferguson-Smith, Malcolm A, Machado, Milla de Andrade, Nagamachi, Cleusa Y, O'Brien, Patricia CM, Pieczarka, Julio C, Silva, Fernando HR   +5 more
core   +2 more sources

Nitrogen excretion and oxygen consumption under severe hypoxia in siluriform fishes from the Amazon

Journal of Fish Biology, EarlyView.
Abstract Siluriform fishes collected from the Rio Negro and Rio Solimões proved to be highly resistant to aquatic hypoxia. In all four species analysed in this study, aquatic oxygen consumption significantly decreased from normoxic levels at water PO2 values near 1 kPa. Air‐breathing activity was observed only in Sturisoma sp. (Rio Negro).
Bernd Pelster, Chris M. Wood, Adalberto Luis Val   +2 more
wiley   +1 more source

Cetobacterium Is a Major Component of the Microbiome of Giant Amazonian Fish (Arapaima gigas) in Ecuador

Animals, 2018
Arapaima gigas is a large air-breathing fish found in Amazonian rivers, a characteristic that gives this species an advantage in oxygen-deprived waters.
Carolina Ramírez, Jaime Coronado, Arturo Silva, Jaime Romero   +3 more
doaj   +1 more source

Efeito da densidade de estocagem na homogeneidade do crescimento de juvenis de pirarucu em ambiente confinado. [PDF]

, 2019
O objetivo deste trabalho foi avaliar o efeito da densidade de estocagem sobre a homogeneidade do crescimento de juvenis de pirarucu (Arapaima gigas) em tanques-rede de pequeno volume.
CAVERO, B. A. S., CRESCENCIO, R., GANDRA, A. L., ITUASSÚ, D. R., PEREIRA-FILHO, M., ROUBACH, R.   +5 more
core  

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

Challenges and Opportunities in Finfish Nutrition [PDF]

, 2006
Much of the criticism leveled at aquaculture (e.g., dependency on animal-derived feedstuffs, nutrient-laden effluent discharges, and increased organic contamination in edible products) can be traced to the feeds in use. Accordingly, finfish nutritionists
Ahn C. N., Alcantara F. B., Balfry S. K., Bimbo A. P., Bimbo A. P., Bobek B., Bock C. L., Bonomi A., Bransden M. P., Buhler D. R., Chamberlain G. W., Choct M., Christopher C. Kohler, Cowey C. B., Craig S. Kasper, Delgado C., Duo L., Fuller R., Furuichi M., Furuichi M., Gampule S. P., Gatlin D. M., Gatlin D. M., Gouillou-Coustans M. F., Halver J. E., Hardy R. W., Hardy R. W., Hardy R. W., Helland S., Hinrichs D. E., Hu F. B., Hung S. S. O., Imbiriba E. P., Jesse T. Trushenski, Jobling M., Kaiser J. B., Kiron V., Krogdahl A., Lall S. P., Leaf A., Li Y., Luquet P., Lutz C. G., MacMillan R., Mahan D. C., McClain W. R., Meyers S. P., Mommsen T. P., Mommsen T. P., Munoz A., Padilla-Perez P., Pereira-Filho M., Phillips S. M., Raboy V., Rebaza A. M., Richardson N. L., Riepe J. R., Roubach R., Rumsey G. L., Saad C. R. B., Sandholm M., Sargent J. R., Satoh S., Shimeno S., Shimeno S., Singh R. P., Tacon A. G. J., Tait M. J., Timmons M. B., Tucker J. W., Verlhac V., Viola S., Wilson R. P., Wilson R. P., Wilson R. P.   +74 more
core   +2 more sources

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