Developmental adjustments of house sparrow (Passer domesticus) nestlings to diet composition
Developmental adjustments of house sparrow (Passer domesticus) nestlings to diet composition
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DOI：
10.1242/jeb.023911
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发表时间：
2009-05-01
影响因子：
2.8
通讯作者：
Karasov, William H.
中科院分区：
文献类型：
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作者：
Brzek, Pawel;Kohl, Kevin;Karasov, William H.
家雀雏鸟在出生后的前3天主要以昆虫为食，之后种子逐渐变得更加重要。我们测试了幼鸟消化道大小和功能能力的发育变化是否与饮食无关，或者可以通过食物类型进行修改。在实验室条件下，我们手喂年轻的家麻雀，无论是无淀粉的昆虫样饮食，主要是基于蛋白质和脂肪，或含淀粉的饮食与基质的混合物类似，提供给年长的雏鸟在自然巢时，他们逐渐断奶从昆虫到种子饮食。整体发展的模式，在身体大小和体温调节能力，并在消化器官的大小增加，是相对相似的家雀雏鸟发展的两种饮食。然而，在碳水化合物分解中起重要作用的总肠道麦芽糖酶活性，在喂食含淀粉饲料的家雀雏鸟中至少高出两倍（P
House sparrow nestlings are fed primarily on insects during the first 3 days of their life, and seeds become gradually more important afterwards. We tested whether developmental changes in size and functional capacity of the digestive tract in young house sparrows are genetically hard-wired and independent of diet, or can be modified by food type. Under laboratory conditions, we hand-fed young house sparrows with either a starch-free insect-like diet, based mainly on protein and fat, or a starch-containing diet with a mix of substrates similar to that offered to older nestlings in natural nests when they are gradually weaned from an insect to a seed diet. Patterns of overall development in body size and thermoregulatory ability, and in alimentary organ size increase, were relatively similar in house sparrow nestlings developing on both diets. However, total intestinal maltase activity, important in carbohydrate breakdown, was at least twice as high in house sparrow nestlings fed the starch-containing diet (P