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La nocturnidad en los dinosaurios se infería de la morfología del anillo escleral y la órbita
1Department of Evolution and Ecology, University of California, Davis, CA 95616, USA. lschmitz@ucdavis.edu
Science (New York, N.Y.)
|April 16, 2011
Resumen
Los arcosaurios del Mesozoico, incluidos los dinosaurios, exhibieron diversos patrones de actividad como nocturna y diurna. Esta investigación revela la partición del nicho temporal en el Mesozoico, similar a los animales modernos.
Área de la Ciencia:
- Paleobiología Paleobiología.
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
Sus antecedentes:
- Los patrones de actividad diaria son cruciales para que las especies puedan dividir hábitats y recursos.
- Comprender la partición del nicho temporal en especies extintas es un desafío debido a los limitados datos fósiles.
Objetivo del estudio:
- Para investigar los patrones de actividad diel de los archosaurios del Mesozoico.
- Proporcionar evidencia para la partición de nichos temporales durante la era Mesozoica.
Principales métodos:
- Análisis de la morfología del anillo escleral y de la órbita en 33 archosaurios fósiles (dinosaurios y pterosaurios).
- Comparación de las adaptaciones del ojo fósil con los patrones de actividad de los amniotas existentes.
Principales resultados:
- Los ojos de los arcosaurios del Mesozoico estaban adaptados para la actividad nocturna, diurna y catemeral.
- Los arcosáuridos voladores (pterosaurios) eran principalmente diurnos.
- Los depredadores terrestres mostraban tendencias nocturnas, mientras que los grandes herbívoros eran catémricos.
Conclusiones:
- Los arcosaurios del Mesozoico demostraron diversos patrones de actividad diel.
- La evidencia sugiere que la partición de nicho temporal estaba presente en el Mesozoico.
- Los factores ecológicos probablemente impulsaron la evolución de estos patrones de actividad, reflejando las especies existentes.
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