Okpokho N A, Craig J V, Milliken G A
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506.
Poult Sci. 1987 Dec;66(12):1905-10. doi: 10.3382/ps.0661905.
Hens of two moderately inbred White Leghorn stocks, known to differ significantly in escape and avoidance behavior, were compared for productivity traits, nervousness, and feather loss when housed four or eight per cage at densities of 348 (high), 464 (medium), and 580 (low) cm2/bird. Differences were found between stocks in sexual maturity, egg production traits, body weights, nervousness, and feather loss. The more nervous strain lost more feathers. Highest density housing depressed performance and increased nervousness and feather loss, but differences were generally lacking between the medium and lowest density housing. Group size effects were not detected for productivity traits, but hens kept in groups of eight had increased nervousness and feather loss. No interactions were detected between stocks and density, stocks and group size, or density and group size.
选取了两个中等近交程度的白来航母鸡品系，已知它们在逃避和回避行为上有显著差异，将其按每笼4只或8只饲养，饲养密度分别为348（高）、464（中）和580（低）平方厘米/只，比较其生产性能、神经质程度和羽毛脱落情况。结果发现，两个品系在性成熟、产蛋性能、体重、神经质程度和羽毛脱落方面存在差异。较神经质的品系羽毛脱落更多。最高密度饲养降低了生产性能，增加了神经质程度和羽毛脱落，但中等密度和最低密度饲养之间通常没有差异。未检测到饲养密度对生产性能的影响，但饲养在8只一组中的母鸡神经质程度和羽毛脱落有所增加。未检测到品系与饲养密度、品系与群体大小或饲养密度与群体大小之间的相互作用。
