Differences in catecholamine metabolism and behaviour in neonatal broiler and layer chicks

S. Saito, T. Takagi, T. Koutoku, E. S. Saito, H. Hirakawa, S. Tomonaga, T. Tachibana, D. M. Denbow, M. Furuse

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


1. To clarify the difference in behavioural activities and catecholamine metabolism between layer and broiler-type chicks two experiments were conducted. 2. In experiment 1, 1-d-old male layer and broiler chicks were placed in an open-field area and their responses were investigated for 10 min. The responses of the two strains were remarkably different, with broilers being less active than layers. Vocalisations rapidly decreased in broilers whereas those of layers remained elevated during the 10 min. 3. In experiment 2, 1-d-old chicks of both strains were killed and brain catecholamine concentrations were determined in three parts of the brain: telencephalon, optic lobe and brain stem. 4. In the whole brain, dopamine (DA) and dihydroxyphenylacetic acid (DOPAC) were significantly higher in broilers. However, the values for norepinephrine (NE), epinephrine (E) and 4-hydroxy-3-methoxyphenylacetic acid (HVA) were similar between strains. The ratios of metabolite/precursor were also calculated: HVA/DOPAC was higher in layers, while NE/DA, E/NE and DOPAC/DA were not significantly different between strains. 5. These results suggest that behavioural activities differ greatly, while there are some differences in catecholamine metabolism between the two strains.

Original languageEnglish
Pages (from-to)158-162
Number of pages5
JournalBritish Poultry Science
Issue number2
Publication statusPublished - Apr 2004

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology


Dive into the research topics of 'Differences in catecholamine metabolism and behaviour in neonatal broiler and layer chicks'. Together they form a unique fingerprint.

Cite this