Inter- and intrahabitat dietary variability of chacma baboons (Papio ursinus) in South African savannas based on fecal δ13C, δ15N, and %N
Inter- and intrahabitat dietary variability of chacma baboons (Papio ursinus) in South African savannas based on fecal δ13C, δ15N, and %N
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DOI：
10.1002/ajpa.20253
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发表时间：
2006-02-01
影响因子：
2.8
通讯作者：
Codron, J
中科院分区：
文献类型：
--
作者：
Codron, D;Lee-Thorp, JA;Codron, J
狒狒是饮食通才，以不同的比例消耗各种各样的食物。因此，很难量化和解释这些灵长类动物的饮食行为。我们提出了稳定的碳（δ（13）C）和氮（δ（15）N）同位素数据，和百分比氮（%N），来自南非的两个热带稀树草原环境中生活的查克玛狒狒（Papio ursinus）的粪便：多山的沃特伯格地区和低洼的克鲁格国家公园。生活在沃特伯格更同质化景观的狒狒比生活在克鲁格公园的狒狒消耗更多的同位素异质性饮食。草和其他基于C-4的食物占克鲁格公园狒狒大量饮食的10-20%（平均）。来自沃特伯格的碳同位素数据表明，狒狒的饮食中含有30-50%的草，这比非洲大草原上的狒狒普遍报道的要高。根据对多肉植物进食的观察，我们提出，沃特伯格狒狒食用的是C-4草和CAM光合多肉植物的混合物，其组合比例在5-75%之间变化（平均值为-35%）。狒狒粪便中的δ（15）N低于同域分布的有蹄类动物，这可能是由于低水平的动物食性、在地下植物部位觅食或在克鲁格公园种群中使用人类食物的组合。狒狒粪便中的N含量始终高于同域的有蹄类食草动物，表明狒狒比其他热带稀树草原哺乳动物消耗更大比例的富含蛋白质的食物。这些数据表明，查克玛狒狒调整其饮食行为，以最大限度地提高蛋白质摄入量，无论其环境如何。(c)2005 Wiley-Liss，Inc.
Baboons are dietary generalists, consuming a wide range of food items in varying proportions. It is thus difficult to quantify and explain the dietary behavior of these primates. We present stable carbon (delta(13)C) and nitrogen (delta(15)N) isotopic data, and percentage nitrogen (%N), of feces from chacma baboons (Papio ursinus) living in two savanna environments of South Africa: the mountainous Waterberg region and the low-lying Kruger National Park. Baboons living in the more homogeneous landscapes of the Waterberg consume a more isotopically heterogeneous diet than their counterparts living in Kruger Park. Grasses and other C-4-based foods comprise between similar to 10-20% (on average) of the bulk diet of Kruger Park baboons. Carbon isotopic data from the Waterberg suggest diets of similar to 30-50% grass, which is higher than generally reported for baboons across the African savanna. Based on observations of succulent-feeding, we propose that baboons in the Waterberg consume a Mix Of C-4 grasses and CAM-photosynthesizing succulents in combined proportions varying between similar to 5-75% (average, -35%). Fecal delta(15)N of baboons is lower than that of sympatric ungulates, which may be due to a combination of low levels of faunivory, foraging on subterranean plant parts, or the use of human foods in the case of Kruger Park populations. Fecal N levels in baboons are consistently higher than those of sympatric ungulate herbivores, indicating that baboons consume a greater proportion of protein-rich foods than do other savanna mammals. These data suggest that chacma baboons adapt their dietary behavior so as to maximize protein intake, regardless of their environment. (c) 2005 Wiley-Liss, Inc.