Results 101 to 110 of about 90,255 (204)

Joint effects of elevated copper and temperature in juvenile Tambaqui exposed in black and white waters of the Amazon

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study aimed to investigate how exposure to elevated water temperature and metal concentration jointly affect the physiology of Amazonian fish. Aboard a research vessel in the Amazon, we evaluated the effects of water temperature (river T°C at 31.5°C and a + 4°C increase to 35.5°C) and of 3‐h copper (Cu) exposure (up to 600 μg/L) in ...
Anne Crémazy   +6 more
wiley   +1 more source

Amazonian drought of 2023: Environmental conditions relevant to fishes

open access: yesJournal of Fish Biology, EarlyView.
Abstract This paper provides a platform for the following studies within this Special Issue. ‘Ecophysiology of fishes in the two great tributaries of the Amazon in the Anthropocene’. It documents the water quality conditions and accompanying zooplankton community structure and biomass relative to fish health in the Rio Negro and Rio Solimões during the
Ora E. Johannsson   +10 more
wiley   +1 more source

Gestión del marketing en empresas hoteleras de la Amazonía colombiana

open access: yesRevista Facultad de Ciencias Económicas
En la investigación se analiza la correlación que existe entre variables estratégicas y operativas con la gestión del mercadeo en plataformas digitales de las empresas hoteleras de una región de la Amazonía colombiana en los últimos tres años.
Cristian Hernández Gil   +1 more
doaj   +1 more source

Concepción matemática indígena en la Amazonía colombiana [PDF]

open access: yes, 2008
La presentación hace referencia a las dificultades que se tienen en la investigación con grupos nativos; a la necesidad de estar acordes con su idiosincrasia para acceder a los espacios comunicativos y de aprendizaje con ellos, que manejan lógicas de ...
Higuera, Clara
core   +1 more source

Cosmología y transformación en la percepción de los kichwa- lorocachi del pueblo ancestral Kawsay Sacha. Río Curaray. Amazonía ecuatoriana [PDF]

open access: yes, 2020
Este artículo es resultado de un estudio más amplio que indaga elementos del sistema cosmológico kichwa. La temática ha sido explorada desde la década de los 80 a partir del llamado giro ontológico perspectivista que conjuga modelos teóricos resultado ...
Yela Dávalos, Diego Fernando
core  

Feeding ecology of an Amazonian electric knifefish under altered flood‐pulse dynamics caused by hydroelectric damming

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study evaluated the effects of the controlled flood pulse on diet composition, trophic niche breadth and feeding intensity of Archolaemus janeae, an electric knifefish species with a restricted distribution in the Amazon Basin. Monthly samples were collected from December 2020 to November 2021 in the Volta Grande stretch of the Xingu ...
Ana F. V. N. M. Costa   +8 more
wiley   +1 more source

Genética de poblaciones amazónicas: la historia evolutiva del jaguar, ocelote, delfín rosado, mono lanudo y piurí, reconstruida a partir de sus genes [PDF]

open access: yes, 2007
The Amazon has more than the half of the world's biodiversity. Nevertheless, the major fraction of the Amazon species has unknown evolutionary histories. This is also certain for mammals and birds.
Corrales, C.   +4 more
core   +1 more source

A new, conspicuously pigmented Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the Río Tigre, Loreto, Peru

open access: yesJournal of Fish Biology, EarlyView.
Abstract A new species of Pyrrhulina is described based on morphological and molecular evidence. Pyrrhulina punctata is distinguished from all congeners by the presence of a series of 7 to 16 irregular blotches of dark pigmentation on the flanks, equally marked in juveniles and adult specimens, the presence of 26–28 lateral‐line scales, 17–21 maxillary
Andre Netto‐Ferreira   +4 more
wiley   +1 more source

El Perú frente al cambio climático : resultados de investigaciones franco-peruanas [PDF]

open access: yes, 2014
En diez capítulos este libro trata de : las interacciones entre la tectónica y el clima que explican el relieve actual y que, de una manera sorprendente, dan origen a los hot-spots de biodiversidad del piedemonte amazónico ; la evolución del clima a lo ...
González Molina, S. (coord.)   +2 more
core  

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