Your browser doesn't support javascript.
loading
Synchronization to light and mealtime of daily rhythms of locomotor activity, plasma glucose and digestive enzymes in the Nile tilapia (Oreochromis niloticus).
Guerra-Santos, Bartira; López-Olmeda, José Fernando; de Mattos, Bruno Olivetti; Baião, Alice Borba; Pereira, Denise Soledade Peixoto; Sánchez-Vázquez, Francisco Javier; Cerqueira, Robson Bahia; Albinati, Ricardo Castelo Branco; Fortes-Silva, Rodrigo.
Afiliação
  • Guerra-Santos B; Department of Animal Science and Veterinary Medicine, Campus Salvador, Federal University of Bahia (UFBA), 40170-110, Bahia, Brazil.
  • López-Olmeda JF; Department of Physiology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.
  • de Mattos BO; Department of Animal Science and Veterinary Medicine, Campus Salvador, Federal University of Bahia (UFBA), 40170-110, Bahia, Brazil.
  • Baião AB; Laboratory of Fish Nutrition and Feeding Behaviour (AquaUFRB), Faculty of Fishing Engineering (NEPA), Center of Agricultural Science, Environmental and Biological (CCAAB), University of Bahia (UFRB), 44380-000 Cruz das Almas, Brazil.
  • Pereira DSP; Laboratory of Fish Nutrition and Feeding Behaviour (AquaUFRB), Faculty of Fishing Engineering (NEPA), Center of Agricultural Science, Environmental and Biological (CCAAB), University of Bahia (UFRB), 44380-000 Cruz das Almas, Brazil.
  • Sánchez-Vázquez FJ; Department of Physiology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain.
  • Cerqueira RB; Laboratory of Fish Nutrition and Feeding Behaviour (AquaUFRB), Faculty of Fishing Engineering (NEPA), Center of Agricultural Science, Environmental and Biological (CCAAB), University of Bahia (UFRB), 44380-000 Cruz das Almas, Brazil.
  • Albinati RCB; Department of Animal Science and Veterinary Medicine, Campus Salvador, Federal University of Bahia (UFBA), 40170-110, Bahia, Brazil.
  • Fortes-Silva R; Laboratory of Fish Nutrition and Feeding Behaviour (AquaUFRB), Faculty of Fishing Engineering (NEPA), Center of Agricultural Science, Environmental and Biological (CCAAB), University of Bahia (UFRB), 44380-000 Cruz das Almas, Brazil. Electronic address: fortes@ufrb.edu.br.
Comp Biochem Physiol A Mol Integr Physiol ; 204: 40-47, 2017 02.
Article em En | MEDLINE | ID: mdl-27845249
The light-dark cycle and feeding can be the most important factors acting as synchronizers of biological rhythms. In this research we aimed to evaluate synchronization to feeding schedule of daily rhythms of locomotor activity and digestive enzymes of tilapia. For that purpose, 120 tilapias (65.0±0.6g) were distributed in 12 tanks (10 fish per tank) and divided into two groups. One group was fed once a day at 11:00h (zeitgeber time, ZT6) (ML group) and the other group was fed at 23:00h (ZT18) (MD group). The fish were anesthetized to collect samples of blood, stomach and midgut at 4-hour intervals over a period of 24h. Fish fed at ML showed a diurnal locomotor activity (74% of the total daily activity occurring during the light phase) and synchronization to the feeding schedule, as this group showed anticipation to the feeding time. Fish fed at MD showed a disruption in the pattern of locomotor activity and became less diurnal (59%). Alkaline protease activity in the midgut showed daily rhythm with the achrophase at the beginning of the dark phase in both ML and MD groups. Acid protease and amylase did not show significant daily rhythms. Plasma glucose showed a daily rhythm with the achrophase shifted by 12h in the ML and MD groups. These results revealed that the feeding time and light cycle synchronize differently the daily rhythms of behavior, digestive physiology and plasma metabolites in the Nile tilapia, which indicate the plasticity of the circadian system and its synchronizers.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Fosfatase Ácida / Glicemia / Ritmo Circadiano / Tilápia / Fosfatase Alcalina / Comportamento Alimentar / Amilases / Luz / Locomoção Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Comp Biochem Physiol A Mol Integr Physiol Assunto da revista: BIOLOGIA MOLECULAR / FISIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Fosfatase Ácida / Glicemia / Ritmo Circadiano / Tilápia / Fosfatase Alcalina / Comportamento Alimentar / Amilases / Luz / Locomoção Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Comp Biochem Physiol A Mol Integr Physiol Assunto da revista: BIOLOGIA MOLECULAR / FISIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos