Tracking forced moult by computer tomography and serum biochemical parameters in laying hens

Róbert Romvári, András Szabó, Gabriella Andrássy-Baka, Zoltán Sütö, Tamás Molnár, Bázár György, Péter Horn

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

For a complex investigation of forced moulting 27 Hy-Line Brown laying hens were exposed to total feed withdrawal with ad libitum water supply, for a trial period of 12 days. Computer tomography for the determination of the total body composition and its changes was performed on days 0, 6, 12 and after 3 wks of refeeding. Blood samples were collected every 3 days for the monitoring of the metabolic status of the hens. Compared to the initial values at the 6th and 12th days of moulting the volume of fat depots, abdominal organs and muscle tissue were reduced to 52.5, 59.7, 85.0, %, and 29.5, 43.5 and 77.9%, respectively. Following the regeneration period of 3 weeks respective values were 89.6, 100.1 and 86.1%, indicating a nearly fully reversible process. Body composition data were exactly quantified using a 3D smoothing method. Blood metabolic parameters indicated changes referring to total feed deprivation (triacylglycerol, total and HDL cholesterol) and low activity (creatinine) as well as the consequent cessation of egg yolk and shell production (total protein, Ca). The enzymatic adaptation was much less pronounced. It was stated that the in vivo CT scanning may be an effective tool for the comparison of alternative moulting methods.

Original languageEnglish
Pages (from-to)245-251
Number of pages7
JournalArchiv fur Geflugelkunde
Volume69
Issue number6
Publication statusPublished - Dec 1 2005

Keywords

  • Blood serum
  • Computer tomography
  • Forced moulting
  • Layers
  • Metabolite

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

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    Romvári, R., Szabó, A., Andrássy-Baka, G., Sütö, Z., Molnár, T., György, B., & Horn, P. (2005). Tracking forced moult by computer tomography and serum biochemical parameters in laying hens. Archiv fur Geflugelkunde, 69(6), 245-251.