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J. Yngvesson M. Wedin S. Gunnarsson L. Jönsson H. Blokhuis A. Wallenbeck 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2017,67(3-4):123-133
Perching is important for broiler welfare, however, hampered by body weight. In a mixed flock, resting behaviour and location were compared between three broiler hybrids (Rowan Ranger, Hubbard CYJA57 &; Ross 308; n?=?100/hybrid), differing in growth. Rearing was in a large littered pen (1.84 birds/m2), with perches. Behaviour and position was observed in focal birds on daytime and as group scans on daytime (days 11, 45, 61 and 80) and night-time (days 63, 70 and 77). Birds were slaughtered at 84 days and accumulated mortality in fast-growing birds was 20% and 2% in slow-growing. Resting frequency did not differ though fast-growing broilers perched less and lower, at night (P?.01) and day (P?.01). On daytime, males disturbed birds resting on the floor more than females did (P?.05). Disrupted rest is a potential welfare issue in broilers, hence perches or other elevated structures would improve welfare. 相似文献
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