Hematological parameters vary with life history stage in the pale-breasted thrush (Turdus leucomelas)

The avian life cycle is composed by a progressive sequence of life history stages (LHS). Changes in energy expenditure and exposure to stressors at different LHS require corresponding changes in behavior, physiology, and morphology. Variation in hematological parameters, such hematocrit (Hct), hemoglobin (Hb), and heterophil to lymphocyte ratio (H/L ratio), can have permissive, stimulatory, and preparative actions to help maintain homeostasis through different LHS. Few studies have examined differences in these parameters among different LHS in free-living birds, with most of them restricted to temperate zones. We collected blood samples and measured hematological parameters every week for over a year from a population of a common resident bird species in southeastern Brazil, the pale–breasted thrush (Turdus leucomelas). Hematocrit and hemoglobin concentration were highest during the onset of the reproduction and lowest during molt. Furthermore, H/L ratios were higher at the end of the ..., , , # Hematological parameters vary with life history stage in the pale-breasted thrush (Turdus leucomelas) [https://doi.org/10.5061/dryad.5qfttdzdq](https://doi.org/10.5061/dryad.5qfttdzdq) This dataset was collected in the Universidade Estadual Paulista (UNESP) - Rio Claro in Sao Paulo, Brazil (2017) **ID**: individual metallic band id given to each individual **day**: day of the year when capture occurred **hour and hour.ori**: **hour.ori** indicates the real hour each individual got captured. For **hour** we considered time, in minutes, after 6:00am. **Temperature**: mean temperature, in celsius, at the time of capture. **sex**: sex of each captured individual **LHS**: life history stage of each individual at the time they got captured **hematocrit**: hematocrit value (%) for each individual **hemoglobin**: hemoglobin level (g/dL) for each individual **weight**: body mass, in grams, for each individual **H_L and H_L.trans**: H/L ratio (heterophil to lymphocyte ratio) and H/L...鸟类的生命周期由一系列递进的生活史阶段（life history stage, LHS）构成。不同生活史阶段的能量消耗变化以及面临的胁迫因子暴露情况，要求其行为、生理与形态特征做出相应调整。血液学参数的变异——如红细胞比容（hematocrit, Hct）、血红蛋白（hemoglobin, Hb）以及异嗜性粒细胞与淋巴细胞比值（heterophil to lymphocyte ratio, H/L比值）——可发挥许可、刺激与预备性作用，助力个体在不同生活史阶段维持内稳态。目前针对野生鸟类不同生活史阶段间上述血液学参数差异的研究较为匮乏，且多数相关研究局限于温带区域。 本研究于巴西东南部的普通留鸟种群——白胸鸫（Turdus leucomelas）——中，耗时一年以上每周采集血液样本并测定其血液学参数。研究发现，红细胞比容与血红蛋白浓度在繁殖启动阶段达到峰值，而在换羽期降至最低；此外，H/L比值在……末期更高。 # 白胸鸫（Turdus leucomelas）血液学参数随生活史阶段变化 [https://doi.org/10.5061/dryad.5qfttdzdq](https://doi.org/10.5061/dryad.5qfttdzdq) 本数据集采集于巴西圣保罗州里奥克拉鲁的圣保罗州立大学（Universidade Estadual Paulista, UNESP）（2017年） **ID**：为每只个体佩戴的金属环标识编号 **day**：捕获当日的年序日 **hour 与 hour.ori**：**hour.ori** 表示每只个体实际被捕获的时刻；**hour** 以当日6:00之后的分钟数计算捕获时刻对应的时长。 **Temperature**：捕获时的平均气温（单位：摄氏度） **sex**：捕获个体的性别 **LHS**：个体被捕获时所处的生活史阶段 **hematocrit**：每只个体的红细胞比容值（单位：%） **hemoglobin**：每只个体的血红蛋白水平（单位：g/dL） **weight**：个体体质量（单位：克） **H_L 与 H_L.trans**：H/L比值（异嗜性粒细胞与淋巴细胞比值）及H/L……