Title

• Melatonin and other tryptophan metabolites: Rhythms outside the animal world and some novel, presumably universal pathways  
  Rüdiger Hardeland

    1

• Circadian rhythms in visual function in Limulus  
  B-A. Battelle

    19

• Neuropeptides and the circadian clock in crustacean. Review and update  
  Durán-Lizarraga ME, Escamilla-Chimal EG, Prieto-Sagredo J and Fanjul-Moles ML

    41

• Circadian rhythms in insects  
  Claudio R. Lazzari and Teresita C. Insausti

    75

• Biological rhythms in the colony of stingless bees  
  Mirian David Marques and Cintia Etsuko Yamashita

    93

• Biological rhythms in fish  
  Carvalho, Maria Raquel and Menna-Barreto, Luiz

    109

• Food entrainment: A multioscillatory system  
  Carolina Escobar, Manuel Angeles-Castellanos, Roberto Salgado Delgado, Katia Rodríguez González and Ruud M. Buijs

    121

• Non-photic entrainment of the circadian system in mammals: A developmental approach  
  Ivette Caldelas, Rodrigo Montúfar-Chaveznava, Margarita Martínez-Gómez and Robyn Hudson

    143

• Feeding as a regulator of biochemical circadian rhythms in the liver  
  Germán Adrián Báez-Ruiz, Alma Dalia Luna-Moreno, Olivia Vázquez-Martínez and Mauricio Díaz-Muñoz

    159

• Neuronal activity in the suprachiasmatic nuclei: Cellular and molecular mechanisms  
  Raúl Aguilar-Roblero, Javier Alamilla, Clara Mercado, Vania Carmona-Alcocer and Christopher S. Colwell

    185