Zone de Texte: We found foraging activity was restricted to the central hours of the day, being maximum between 12 and 17 hours, and significantly different from the morning and the afternoon. This fact is clearly related to the opening rhythm of flowering. Besides, foraging time in the central hours was different from the rest, varying between 3 and 50 seconds. Zone de Texte: Biology and reproduction of the water hyacinth in the Guadiana River (Badajoz) Trinidad Ruiz Téllez, Elsa Martín de Rodrigo López, Gloria Lorenzo Granado, Eva Albano Pérez, Adolfo Muñoz Rodríguez, Juan Manuel Sánchez Guzmán. Zone de Texte: We found foraging activity was restricted to the central hours of the day, being maximum between 12 and 17 hours, and significantly different from the morning and the afternoon. This fact is clearly related to the opening rhythm of flowering. Besides, foraging time in the central hours was different from the rest, varying between 3 and 50 seconds. Zone de Texte: Biology and reproduction of the water hyacinth in the Guadiana River (Badajoz) Trinidad Ruiz Téllez, Elsa Martín de Rodrigo López, Gloria Lorenzo Granado, Eva Albano Pérez, Adolfo Muñoz Rodríguez, Juan Manuel Sánchez Guzmán.

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