Food wasting by house mice: variation among individuals, families, and genetic lines
Food wasting by house mice: variation among individuals, families, and genetic lines
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DOI：
10.1016/j.physbeh.2003.09.001
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发表时间：
2003-11-01
影响因子：
2.9
通讯作者：
Garland, T
中科院分区：
文献类型：
--
作者：
Koteja, P;Carter, PA;Garland, T
在随意的条件下，实验室家鼠(Mus Home Ticus)会将相当数量的颗粒食物碎裂，并将其散落在笼子里。这样浪费的食物比例(与所吃食物的比例)在不同个体之间差异很大，从2%到40%，但在连续的试验中高度一致，即使当老鼠从22摄氏度移动到-10摄氏度，食物消耗量翻了一番。食物浪费在性别之间或在选择了高自愿车轮行为的遗传系(10代)之间(n=4)和其未选择的对照系(n=4)之间没有差异。但在选择群内重复系间和系内家系间差异显著(全同胞组内相关系数，室温试验的Rho(F)=0.41，冷试的Rho(F)=0.34)。此外，在冷实验中，食物浪费的百分比与食物消耗量(雄性：r=-0.36，雌性：r=-0.20)和断奶时的总窝量(它们出生的窝量；r=-0.24)负相关，这两个特征可能影响达尔文的适合度。我们的结论是，在计算食物消费量时，不应毫无理由地忽视食物浪费。此外，“餐桌礼仪”可以传达关于个人家庭出身及其素质的可靠信息，因此可能在确立社会地位方面发挥作用。(C)2003 Elsevier Inc.保留所有权利。
Under ad libitum conditions, laboratory house mice (Mus domesticus) fragment considerable amounts of pelleted food and leave it scattered in their cages. The proportion of food thus wasted (in relation to food eaten) varies remarkably among individuals, from 2% to 40%, but is highly consistent in consecutive trials, even when the mice were moved from 22 to -10 degreesC and food consumption doubled. Food wasting did not differ either between the sexes or between genetic lines that had been selected (10 generations) for high voluntary wheel-running behavior (n = 4) and their unselected control lines (n = 4). However, it varied significantly among replicate lines within the selection groups and among families within the lines (coefficient of intraclass correlation for full sibs, rho(f) = 0.41 in room temperature trials and rho(f) = 0.34 in cold trials). Moreover, the percent of food wasted was negatively correlated with food consumption in the cold trials (males: r = - .36, females: r = - .20) and with total litter mass at weaning (the litters into which they were born; r = - .24), two traits that may affect Darwinian fitness. We conclude that food wastage should not be ignored without justification in calculations of food consumption. In addition, "table manners" can convey reliable information about family origin of an individual and its quality, and therefore could potentially play a role in establishment of social status. (C) 2003 Elsevier Inc. All rights reserved.