Drinking frequency in wild lactating chimpanzees ( Pan troglodytes schweinfurthii ) and their offspring
Drinking frequency in wild lactating chimpanzees ( Pan troglodytes schweinfurthii ) and their offspring
复制标题
野生哺乳黑猩猩（Pan troglodytes schweinfurthii）及其后代的饮水频率
DOI：
10.1002/ajp.23371
复制
发表时间：
2022
影响因子：
2.4
通讯作者：
Murray, Carson M.
中科院分区：
文献类型：
--
作者：
Nelson, Rachel S.;Lonsdorf, Elizabeth V.;Terio, Karen A.;Wellens, Kaitlin R.;Lee, Sean M.;Murray, Carson M.
维持水分平衡对机体健康至关重要，哺乳期女性必须平衡个体需求与产奶量和后代水分。灵长类动物的奶是稀释的，在相当长的一段时间里被认为是婴儿补水的主要来源。很少有研究调查哺乳可能给雌性灵长类动物带来的水合负担。在这项研究中，我们调查了野生黑猩猩（泛穴居种）雌性和后代饮酒频率的变异来源。我们假设雌性会经历季节性和哺乳期的水合负担，并调整其饮酒行为以适应这些负担，但这种水合负担在不同统治地位的雌性之间会有所不同。我们还预测，胎次将与母亲饮酒频率有关，因为初产女性仍在为自己的成长投资。最后，我们预测后代在干旱季节会喝更多的水，随着年龄的增长，奶水作为水源会减少，但高等级雌性的后代会受到这些影响的缓冲。通过对贡贝国家公园41年母亲和后代行为的长期数据分析，我们发现母亲在旱季喝得更多，但在此期间，不同等级的母亲之间没有显著差异。在哺乳期后期，低等级的雌性明显比中高等级的雌性喝得多。后代在旱季和年龄增长时也会喝得更多，但没有证据表明那些母亲地位高的后代会有缓冲。虽然我们研究的黑猩猩不经常喝酒，但它们确实表现出明显的饮酒行为变化，这表明季节性和生殖的水分负担。
Maintaining water balance is essential for organismal health, and lactating females must balance individual needs with milk production and offspring hydration. Primate milk is dilute and presumed to be the primary source for infant hydration for a considerable time period. Few studies have investigated the hydration burden that lactation may place on female primates. In this study, we investigated sources of variation in female and offspring drinking frequency among wild chimpanzees (Pan troglodytes). We hypothesized females would experience seasonal and lactation hydration burdens and adjust their drinking behavior to accommodate these, but this hydration burden would vary between females of different dominance ranks. We also predicted that parity would relate to maternal drinking frequency since primiparous females are still investing in their own growth. Finally, we predicted that offspring would drink more in the dry season and as they aged and lost milk as a water source, but that offspring of high‐ranking females would be buffered from these effects. Using 41 years of long‐term data on the behavior of mothers and offspring of Gombe National Park, we found that mothers drank more in the dry season, but there was no significant difference between mothers of different ranks during this period. Low‐ranking females drank significantly more than mid‐ and high‐ranking females during late lactation. Offspring also drank more in the dry season and as they aged, but there was no evidence of buffering for those with high‐ranking mothers. While chimpanzees in our study population drank infrequently, they do demonstrate noticeable shifts in drinking behavior that suggests seasonal and reproductive hydration burdens.