Sex and seasonal differences in diet and nutrient intake in Verreaux's sifakas (Propithecus verreauxi).
Sex and seasonal differences in diet and nutrient intake in Verreaux's sifakas (Propithecus verreauxi).
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DOI：
10.1002/ajp.22595
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发表时间：
2017-04
影响因子：
2.4
通讯作者：
Fichtel C
中科院分区：
文献类型：
--
作者：
Koch F;Ganzhorn JU;Rothman JM;Chapman CA;Fichtel C
食物供应的波动是生活在季节性气候下的灵长类动物面临的主要挑战。由于繁殖的能量成本很高，食物供应的变化对雌性来说尤其具有挑战性。因此，女性必须适应不同生殖阶段的特殊需求，以适应资源的季节性供应。马达加斯加的气候季节性很强，粮食供应变化极大。我们调查了马达加斯加西部干燥落叶林中雌性和雄性猴（Propithecus verreauxi）的饮食成分、营养和能量摄入的季节性变化。我们研究了女性如何根据不同的生殖阶段调整饮食。季节性影响了男女的饮食；特别是在旱季（4 月至 10 月），食物（特别是水果）的供应量较低，与食物和水果供应量较高的雨季（11 月至 3 月）相比，男性和女性的营养和能量摄入量减少。不同生殖阶段性别饮食的比较表明，在哺乳后期（11月至1月），女性的食物摄入量较高，因此常量营养素（粗蛋白、脂肪和非结构性碳水化合物（TNC））和能量的摄入量高于男性。这些差异在女性怀孕期间并不存在，两性在该阶段的常量营养素和能量摄入量相似。在哺乳后期观察到的雌性常量营养素摄入量的增加可能与该繁殖阶段更高的能量需求有关。因此，观察到的饮食模式表明，雌性狐猴正在遵循一种资本繁殖策略，即雌性可能会储存足够的营养物质，以应对食物供应不足时期的繁殖成本。
Fluctuations in food availability are a major challenge faced by primates living in seasonal climates. Variation in food availability can be especially challenging for females, because of the high energetic costs of reproduction. Therefore, females must adapt the particular demands of the different reproductive stages to the seasonal availability of resources. Madagascar has a highly seasonal climate, where food availability can be extremely variable. We investigated the seasonal changes in diet composition, nutrient and energy intake of female and male sifakas (Propithecus verreauxi) in a dry deciduous forest in western Madagascar. We examined how females adjust their diet to different reproductive stages. Seasonality affected the diet of both sexes; particularly in the dry season (Apr–Oct) with low availability of food items, especially fruits, males and females had a reduced nutrient and energy intake compared to the wet season (Nov–Mar) with higher food and fruit availability. The comparison of the diet between sexes in different reproductive stages showed that during the late stage of lactation (Nov–Jan) females had higher food intake, and as a result they had a higher intake of macronutrients (crude protein, fat and non‐structured carbohydrates (TNC)) and energy than males. These differences were not present during the pregnancy of females, with both sexes having similar intake of macronutrients and energy during that stage. The increase in the intake of macronutrients observed for females during late lactation could be related to the higher energetic demands of this stage of reproduction. Thus, the observed pattern in the diet indicates that sifaka females are following a capital breeding strategy, whereby females potentially store enough nutrients to cope with the reproduction costs in periods of low food availability.
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影响因子：
2.5
作者：
HARRISON, MJS
通讯作者：
HARRISON, MJS
影响因子：
2.5
作者：
Donati, Giuseppe;Baldi, Nicoletta;Borgognini-Tarli, Silvana M.
通讯作者：
Borgognini-Tarli, Silvana M.
影响因子：
2.3
作者：
Hemingway, CA
通讯作者：
Hemingway, CA
DOI：
10.1017/cbo9780511542343.012
发表时间：
2005-01-01
期刊：
SEASONALITY IN PRIMATES: STUDIES OF LIVING AND EXTINCT HUMAN AND NON-HUMAN PRIMATES
影响因子：
--
作者：
Janson, Charles;Verdolin, Jennifer
通讯作者：
Verdolin, Jennifer
影响因子：
2.8
作者：
Droescher, Iris;Rothman, Jessica M.;Kappeler, Peter M.
通讯作者：
Kappeler, Peter M.