在不同的资源选择环境中养的母的子大小,形状复杂性和横向性
R V Holt1, L Skånberg2, L J Keeling2
1Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, Ås, P.O. Box 5003, N-1432 Ås, Norway.
概括
幼发育期间的环境丰富没有影响产母的子大小或复杂性. 的横向性显示出右侧偏差,的特征与个体的状况有关,而不是养殖治疗的福利指标.
科学领域:
- 动物科学动物科学
- 伦理学 伦理学 伦理学
- 动物福利 动物福利
背景情况:
- 在家禽中,形态与信号条件有关.
- 环境的丰富可能会影响生理压力和发育.
- 的横向性,大小和复杂性是全静电负荷的潜在指标.
研究的目的:
- 调查幼儿发育期间环境丰富 (资源选择) 对产卵母形态学的影响.
- 要确定子的大小,复杂性 (粗性) 和横向性是否受到单个或多个资源选择的影响.
- 评估的特征是否可以作为福利的综合指标,以应对养殖条件.
主要方法:
- 一个2x2因数交叉实验,在两个发育期内,将幼暴露在单个或多个选择的子和子类型中.
- 使用成年的图像分析 (第27周) 来测量毛面积,周长和粗度.
- 记录了的侧面性 (左侧或右侧偏差),并分析了与养育治疗和身体状况的关联.
主要成果:
- 与预测相反,在资源选择治疗和毛面积,周边长度,粗度或横向性之间没有发现显著的关联.
- 在所有治疗组中观察到边度的整体右侧偏差.
- 左的有比右更短的周长;个体的特征与的体重和羽毛/损伤相关.
结论:
- 在幼养殖期间通过选择资源来丰富环境并没有改变产母的形态发育.
- 特征似乎反映了个人的身体状况,而不是作为与基本环境丰富相关的福利状况的敏感指标.
- 该研究表明,经测试的环境丰富水平对福利带来了潜在的上限效应,不足以改变发展轨迹.
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