Video Experimental Relacionado
Updated: Oct 25, 2025

07:28
Non-aversive Animal Restraint Enabling Recording of Optomotor Reflex in Ground Squirrels
Published on: July 25, 2025
1.1K
Las ardillas acrobáticas aprenden a saltar y aterrizar en las ramas de los árboles sin caerse
Nathaniel H Hunt1,2, Judy Jinn3, Lucia F Jacobs3
1Department of Biomechanics, University of Nebraska, Omaha, Omaha, NE, USA. nhunt@unomaha.edu.
Resumen
Las ardillas de zorro equilibran la distancia y la flexibilidad de las ramas al saltar. Aprenden rápidamente a ajustar sus saltos y usar aterrizajes ágiles, demostrando biomecánica y cognición para la navegación en el dosel.
Área de la Ciencia:
- Biomecánica
- La cognición animal
- La locomoción arbórea
Sus antecedentes:
- Los animales arbóreos dependen de saltar para viajar y evadir a los depredadores.
- El salto exitoso implica decisiones biomecánicas complejas y aprender de la experiencia.
Objetivo del estudio:
- Investigar cómo las ardillas zorro (Sciurus niger) toman decisiones de salto a través de distancias de brecha variables y cumplimiento de ramas.
- Comprender el papel del aprendizaje y los comportamientos adaptativos en la locomoción arbórea.
Principales métodos:
- Observación de ardillas de zorro en libertad en ramas simuladas con distancias de separación controladas y cumplimiento.
- Analizando estrategias de lanzamiento y maniobras de aterrizaje.
- Evaluar el aprendizaje a través de la exposición repetida a rayos desconocidos y compatibles.
Principales resultados:
- Las ardillas equilibraron la distancia y el cumplimiento de las ramas al decidir dónde lanzarse.
- Aprendieron rápidamente a modificar la generación de impulsos en superficies compatibles.
- Las maniobras de aterrizaje ágiles y los comportamientos de "parkour" adaptativos facilitaron la navegación exitosa de saltos desafiantes.
Conclusiones:
- Las ardillas de zorro integran la biomecánica y la cognición para estrategias efectivas de cruce de brechas.
- El aprendizaje y los comportamientos adaptativos son cruciales para una robusta locomoción arbórea.
- Las ardillas muestran una sofisticada toma de decisiones y resolución de problemas durante el salto.
Videos de Conceptos Relacionados
Rab Cascades
2.9K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
2.9K
Survival Tree
189
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
189
Epiphytes, Parasites, and Carnivores
15.3K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
15.3K
Rolling Without Slipping
4.3K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
4.3K
Hydraulic Jump
269
A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
269
Hydraulic Jump: Problem Solving
228
To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
228

