Species’ activity patterns are driven by the need to meet basic requirements of food, social interactions, movement, and rest, but often are influenced by a variety of biotic and abiotic factors. We used camera-trap data to describe and compare the activity patterns of the relatively poorly studied tayra (Eira barbara) across 10 populations distributed from the south of Mexico to the north of Argentina, and attempted to identify biotic or abiotic factors that may be associated with variation in level of diurnality. In a subset of sites we also aimed to document potential seasonal variation in activity. We used a kernel density estimator based on the time of independent photographic events to calculate the proportion of diurnal, crepuscular, and nocturnal activity of each population. Tayras were mostly active during diurnal periods (79.31%, 759 records), with a lower proportion of crepuscular activity (18.07%, 173 records) yet we documented some variation in patterns across the 10 study areas (activity overlap coefficient varied from Δ ₄ = 0.64 to Δ ₁ = 0.95). In northern localities, activity peaked twice during the day (bimodal) with most activity ocurring in the morning, whereas closer to the geographical equator, activity was constant (unimodal) throughout the day, peaking at midday: activity either was unimodal or bimodal in southern localities. Despite investigating multiple potential abiotic and biotic predictors, only latitude was associated with variation in the proportion of diurnal activity by tayras across its range, with increased diurnal activity closer to the equator. Seasonal comparisons in activity showed a tendency to reduce diurnality in dry versus rainy seasons, but the pattern was not consistently significant. This is the most comprehensive description of tayra activity patterns to date, and lends novel insight into the potential flexibility of the species to adapt to local conditions.

中文翻译：

---

tayra ( Eira barbara ) 分布的活动模式

物种的活动模式是由满足食物、社会交往、运动和休息等基本要求的需要驱动的，但往往受到各种生物和非生物因素的影响。我们使用相机陷阱数据来描述和比较研究相对较少的 tayra ( Eira barbara) 分布在从墨西哥南部到阿根廷北部的 10 个种群中，并试图确定可能与昼夜水平变化相关的生物或非生物因素。在一部分站点中，我们还旨在记录活动的潜在季节性变化。我们使用基于独立摄影事件时间的核密度估计器来计算每个种群的昼夜活动、黄昏活动和夜间活动的比例。Tayras是在昼夜周期（79.31％，759个记录）主要活性，与黄昏活性（18.07％，173个记录）的比例较低但我们跨越10个研究区记录在图案的一些变化（活度重叠系数变化从Δ  ₄ = 0.64 至 Δ  ₁= 0.95）。在北部地区，活动在白天出现两次高峰（双峰），大部分活动发生在早晨，而在靠近地理赤道的地方，全天活动是恒定的（单峰），在中午达到顶峰：南部的活动要么是单峰的，要么是双峰的地方。尽管研究了多个潜在的非生物和生物预测因子，但只有纬度与泰拉斯在其范围内的昼夜活动比例的变化有关，靠近赤道的昼夜活动增加。活动的季节性比较表明，旱季与雨季的昼夜性趋于减少，但这种模式并不总是显着的。这是迄今为止对 tayra 活动模式最全面的描述，