Effects of the Scale and Spatial Distribution of the Food Resource and Animal State on Diet Selection: An Example with Sheep
Effects of the Scale and Spatial Distribution of the Food Resource and Animal State on Diet Selection: An Example with Sheep
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DOI：
10.2307/5259
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发表时间：
1994-10
影响因子：
4.8
通讯作者：
G. Edwards;J. Newman;A. Parsons;J. Krebs
中科院分区：
文献类型：
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作者：
G. Edwards;J. Newman;A. Parsons;J. Krebs
1.通过两个试验研究了食物资源规模、空间分布和动物状态对绵羊日粮选择的影响。2.在实验1中，允许室内围栏中的绵羊从含有150 g谷物（优选）和150 g稻草（非优选）绵羊颗粒的均匀混合物的贴片（碗）中进食2分钟。为了测试单个食物项目的空间尺度（大小）如何影响饮食选择的能力，将两种类型的颗粒切割成20、15、10或5 mm长（直径均为5 mm）。为了测试动物状态对饮食选择的影响，在禁食0（未禁食）、18或24 h后对绵羊进行测试。3.在所有的治疗中，绵羊选择的饮食与提供的50%不同
1. The effects of the scale and spatial distribution of the food resource and animal state on diet selection of sheep were examined in two experiments. 2. In Experiment 1, sheep in indoor pens were allowed to feed for 2 min from a patch (bowl) that contained a homogeneous mixture of 150 g of cereal (preferred) and 150 g of straw (non-preferred) sheep pellets. To test how the spatial scale (size) of individual food items affected the capacity for diet selection, both types of pellets were cut to either 20, 15, 10 or 5 mm long (all 5 mm in diameter). To test the effects of animal state on diet selection, the sheep were tested after fasting for 0 (not fasted), 18 or 24 h. 3. In all treatments, sheep selected a diet that differed from the 50% on offer