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La elección de la pareja en las lagunas de ciervos en barbecho.

T H Clutton-Brock¹, M Hiraiwa-Hasegawa, A Robertson

¹Department of Zoology, University of Cambridge, UK.

|August 10, 1989

Resumen

Las hembras de los ciervos en barbecho eligen parejas en función de los rasgos masculinos, no de la ubicación del territorio. Los experimentos mostraron que el éxito del apareamiento masculino persistió incluso después de los cambios de territorio, lo que indica que la elección femenina impulsa la dinámica del lek.

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Área de la Ciencia:

Ecología del comportamiento Ecología del comportamiento.
Biología evolutiva Biología evolutiva.
Comportamiento animal Comportamiento animal.

Sus antecedentes:

Los sistemas de apareamiento Lek involucran a los machos defendiendo territorios para oportunidades de apareamiento.
La elección femenina es un factor clave en la evolución de lek, pero la base de esta elección es objeto de debate.
Los factores potenciales incluyen el fenotipo masculino, la calidad del territorio o la interferencia entre los machos.

Objetivo del estudio:

Investigar los factores primarios que impulsan la elección de pareja femenina en los lagos de ciervos en barbecho.
Para diferenciar entre la preferencia femenina por los rasgos masculinos frente a las características del territorio.

Principales métodos:

Manipulación experimental de las posiciones del territorio para los búfalos en barbecho en un lek.
Observación y registro del éxito del apareamiento y los movimientos de las hembras entre territorios.
Análisis de las correlaciones entre el fenotipo masculino, la ubicación del territorio y el éxito del apareamiento.

Principales resultados:

Las diferencias de éxito en el apareamiento masculino persistieron después de los intercambios de territorio experimentales.
La posición del territorio en relación con el centro del lek no tuvo un impacto significativo en el éxito del apareamiento.
Las hembras se movían libremente entre territorios, y la interferencia masculina era mínima.

Conclusiones:

El ciervo de barbecho hembra elige principalmente a sus parejas en función de los rasgos fenotípicos masculinos, no de los atributos del territorio.
La elección femenina, en lugar de la defensa del territorio o la competencia entre machos, parece ser el principal impulsor del éxito del apareamiento en esta población lek.
El tamaño del harén fue el factor inmediato que influyó en los movimientos de las hembras entre los machos.