Video Experimental Relacionado
Updated: May 29, 2026
07:37
Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus (Murayama), Using a Low-Cost, Small, and Easily Constructed Flight Mill
Published on: August 6, 2018
El vuelo a baja humedad ambiental aumenta el catabolismo de proteínas en las aves migratorias
Alexander R Gerson1, Christopher G Guglielmo
1Department of Biology, Advanced Facility for Avian Research, University of Western Ontario, London, Ontario N6A 5B7, Canada. agerson2@uwo.ca
Science (New York, N.Y.)
|September 10, 2011
Resumen
La migración de las aves utiliza proteínas como combustible para conservar el agua. Los estudios muestran que el catabolismo de las proteínas ayuda a mantener el equilibrio hídrico durante los vuelos largos, especialmente en condiciones secas.
Área de la Ciencia:
- Fisiología de las aves.
- Las estrategias metabólicas en la migración animal.
- La homeostasis osmótica también es una homeostasis osmótica.
Sus antecedentes:
- La grasa es el principal combustible para el vuelo migratorio de las aves, pero también se utilizan proteínas.
- El catabolismo de las proteínas produce significativamente más agua por kilojoule que el catabolismo de las grasas.
- Una hipótesis sugiere que el catabolismo de proteínas ayuda al equilibrio del agua durante los vuelos sin escalas.
Objetivo del estudio:
- Para probar la hipótesis de la proteína por agua en aves migratorias.
- Para investigar el papel del catabolismo de proteínas en el mantenimiento del equilibrio hídrico durante el vuelo.
- Para determinar el efecto de la humedad atmosférica en el uso de combustible durante la migración de las aves.
Principales métodos:
- Las zorras de Swainson (Catharus ustulatus) volaron en un túnel de viento climático.
- Los experimentos se llevaron a cabo a una temperatura constante (18 ° C) durante un máximo de 5 horas.
- Las condiciones de vuelo variaron entre ambientes de alta y baja humedad.
Principales resultados:
- El vuelo en condiciones secas condujo a una mayor pérdida de masa magra.
- Las tasas de producción de agua endógena fueron más altas en condiciones de baja humedad.
- La concentración plasmática de ácido úrico aumentó durante el vuelo en ambientes secos.
Conclusiones:
- La humedad atmosférica influye en la composición del combustible utilizado durante el vuelo aéreo.
- La deposición de proteínas y el catabolismo parecen ser una estrategia metabólica para mantener la homeostasis osmótica durante la migración.
- Estos hallazgos apoyan la hipótesis de proteína por agua en las aves migratorias.
Videos de Conceptos Relacionados
00:53Migration
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
02:27Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
01:47Osmoregulation in Insects
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
00:48Optimal Foraging
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
01:26Requirements for Human Life
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
01:24Factors Affecting Respiration
Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process: