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In vivo Tetracycline Labelling as a Measure of Rearing‐system Influence on Chicken‐bone Dynamics
Author(s) -
Vitorovic D.,
Nikolic Z.,
Cvetkovic D.
Publication year - 1995
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1995.tb00015.x
Subject(s) - cage , humerus , tibia , broiler , biology , anatomy , zoology , veterinary medicine , medicine , mathematics , combinatorics
Summary The objective of this study was to estimate the internal dynamics of leg (tibia) and wing (humerus) bones in light and heavy types of chicken, reared in cages and on the floor. The ratio of floor‐to‐cage area was 3:1. All chicks were fed a standard broiler mixture (0‐4 weeks with 0.9% Ca and 0.7% P; 4–7 weeks with 0.8% Ca and 0.5% P). Each bird was given two intraperitoneal injections of 30 mg/kg of oxy‐tetracycline at 2‐day intervals. The results showed no significant differences between floor‐and cage‐reared birds in tibial‐osteon appositional rates. However, there was a significant rearing‐system effect on humerus internal dynamics. Seven‐week‐old light chicks, reared on the floor, had humeri with a higher appositional rate than those reared in the cages.