Video Experimental Relacionado
Updated: May 9, 2026
06:40
Operant Conditioning Task to Measure Song Preference in Zebra Finches
Published on: December 26, 2019
La evolución de la monogamia social en los mamíferos
1Department of Zoology, University of Cambridge, Cambridge, UK. dl384@cam.ac.uk
Science (New York, N.Y.)
|July 31, 2013
Resumen
La monogamia social en los mamíferos evolucionó a partir de antepasados solitarios, no de un alto riesgo de infanticidio. El cuidado paterno siguió, no precedió, a la monogamia, lo que sugiere una estrategia de apareamiento para los machos incapaces de defender a múltiples hembras.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Los sistemas sociales de los mamíferos.
- Ecología del comportamiento ecología del comportamiento.
Sus antecedentes:
- Los orígenes evolutivos de la monogamia social se han debatido durante más de un siglo.
- Comprender el estado ancestral de la socialidad de los mamíferos es clave para rastrear la evolución de la monogamia.
- Las hipótesis anteriores vinculaban la monogamia con factores como el riesgo de infanticidio y el cuidado paterno.
Objetivo del estudio:
- Determinar el sistema social ancestral para todos los grupos de mamíferos.
- Investigar los factores asociados con la evolución de la monogamia social en los mamíferos.
- Aclarar la relación entre el cuidado paterno, el riesgo de infanticidio y el surgimiento de la monogamia social.
Principales métodos:
- Análisis comparativo filogenético en diversos taxones de mamíferos.
- Reconstrucción de los comportamientos sociales ancestrales.
- Modelado estadístico para probar las correlaciones entre los rasgos sociales y los factores ambientales.
Principales resultados:
- El sistema social de los mamíferos ancestrales es la vida solitaria.
- La monogamia social es un rasgo derivado, que evoluciona casi exclusivamente de la ascendencia solitaria.
- La evolución de la monogamia social no estuvo fuertemente asociada con un alto riesgo de infanticidio masculino.
- El cuidado paterno parece ser una consecuencia, no un impulsor, de la monogamia social.
- La monogamia social evolucionó en contextos de baja densidad femenina y territorialidad femenina, donde los machos no podían monopolizar a múltiples hembras.
Conclusiones:
- La monogamia social en los mamíferos evolucionó principalmente a partir de antepasados solitarios.
- Los factores ambientales, como la distribución y el espaciamiento de las hembras, son los principales impulsores de la evolución de la monogamia social.
- El papel del infanticidio y el cuidado paterno en el origen de la monogamia social es secundario a las estrategias de defensa de recursos.
Videos de Conceptos Relacionados
01:20Mate Choice
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
01:54Convergent Evolution
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
01:06Natural Selection and Mating Preferences
The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
01:23Criticisms of the Evolutionary Perspective
In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...
Evolutionary psychology provides one explanation for these findings, suggesting...
01:24Evolution of New Traits in Microbes
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
00:57Inclusive Fitness
Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.