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Comportamiento de los insectos: las bandas migratorias protegen a los grillos.

Gregory A Sword1, Patrick D Lorch, Darryl T Gwynne

  • 1Northern Plains Agricultural Research Laboratory, US Department of Agriculture, Agricultural Research Service, Sidney, Montana 59270, USA. gsword@sidney.ars.usda.gov

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Las bandas migratorias de grillos y langostas mormonas ofrecen seguridad en números. Unirse a estos grupos masivos de insectos reduce significativamente el riesgo de depredación de un individuo, lo que sugiere que este comportamiento evolucionó para la protección del grupo.

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Área de la Ciencia:

  • Ecología Ecología Ecología.
  • Ecología del comportamiento Ecología del comportamiento.
  • Entomología Entomología.

Sus antecedentes:

  • Los grillos mormones y las langostas juveniles forman enormes bandas migratorias.
  • Estas bandas pueden devastar las áreas agrícolas.
  • Las razones detrás de la formación de la banda no se entienden bien.

Objetivo del estudio:

  • Investigar las ventajas ecológicas y evolutivas de la formación de bandas migratorias en grillos y langostas mormonas.
  • Para determinar si la pertenencia a una banda proporciona beneficios a los insectos individuales.

Principales métodos:

  • Se empleó radiotelemetría para rastrear insectos individuales dentro de bandas migratorias.
  • El estudio se centró en grillos mormones y langostas juveniles.

Principales resultados:

  • Se descubrió que la pertenencia a una banda reduce significativamente la probabilidad de que los insectos individuales sean presa.
  • El movimiento colectivo y los grandes números dentro de las bandas parecen ofrecer una protección sustancial.

Conclusiones:

  • Las bandas migratorias en estos insectos probablemente evolucionaron como una estrategia para evitar a los depredadores.
  • La vida en grupo proporciona una ventaja de supervivencia para los individuos dentro de estas grandes agregaciones.