The impacts of road infrastructure on wildlife are of mounting concern. Amidst a growing body of literature on vehicle–wildlife collisions, few studies focus on primates. We examined a long-term dataset (2000–2018) of community-reported welfare cases for four species of monkeys: colobus ( Colobus angolensis palliatus ), Sykes’s monkey ( Cercopithecus mitis albogularis ), vervet ( Chlorocebus pygerythrus hilgerti ), and baboon ( Papio cynocephalus cynocephalus ). We analyzed collision rates using annual census data along a 10-km road section through the suburban town of Diani, Kenya. Vehicle–monkey collisions represented 705 of 1896 cases (37%), which was the most common anthropogenic cause of injury and death. The mean number of monthly vehicle–monkey collisions was 3 (range 0–10), and 83% of collisions led to death of the monkey. We found 1) higher degrees of terrestrialism were associated with lower number of collision cases; 2) no differences in the collision rates between juveniles, subadults, and adults across species, but collisions involving infants occurred at lower rates; 3) similar collision rates for female and male colobus and baboons, whereas Sykes’s monkey females and vervet males were more frequently involved in collisions than the other sex; 4) no correlation between the number of hotel bed-nights (a measure of tourist numbers) and vehicle collisions; and 5) drier days correlated with increased rates of vehicle–monkey collisions across all species. This study highlights the risks of roads for monkeys, and that collision rates vary with species, age class, and, in some species, sex and that rainfall is one factor that affects these rates.

中文翻译：

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2000 年至 2018 年，肯尼亚迪亚尼市郊公路上四种猴子的车辆碰撞

道路基础设施对野生动物的影响越来越受到关注。在越来越多的关于车辆与野生动物碰撞的文献中，很少有研究关注灵长类动物。我们检查了社区报告的四种猴子福利案例的长期数据集（2000-2018 年）：疣猴 (Colobus angolensis palliatus)、赛克斯猴 (Cercopithecus mitis albogularis)、长尾猴 (Chlorocebus pygerythrus hilgeraboon (Chlorocebus pygerythrus hilgeraboon) 和 pio食蟹猴 食蟹猴）。我们使用年度人口普查数据分析了穿过肯尼亚郊区城镇迪亚尼的 10 公里路段的碰撞率。车辆与猴子的碰撞占 1896 起案例中的 705 起（37%），这是最常见的人为伤害和死亡原因。每月车辆-猴子碰撞的平均次数为 3（范围 0-10），83% 的碰撞导致猴子死亡。我们发现 1) 较高程度的地球现象与较低的碰撞案例数量相关；2) 不同物种的幼体、亚成体和成体之间的碰撞率没有差异，但涉及婴儿的碰撞发生率较低；3）雌性和雄性疣猴和狒狒的碰撞率相似，而赛克斯的雌猴和雄性黑尾猴比其他性别更频繁地参与碰撞；4）酒店住宿夜数（游客人数的衡量标准）与车辆碰撞之间没有相关性；5) 干燥的日子与所有物种的车-猴碰撞率增加相​​关。这项研究强调了道路对猴子的风险，碰撞率因物种、年龄等级以及某些物种的性别而异，降雨是影响这些发生率的一个因素。