Leukocyte allometries in birds are not affected by captivity
Leukocyte allometries in birds are not affected by captivity
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鸟类的白细胞异质性不受圈养的影响
DOI：
10.1002/jez.2591
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Downs, Cynthia J.
中科院分区：
文献类型：
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作者：
Martin, Lynn B.;Ruhs, Emily Cornelius;Oakey, Samantha;Downs, Cynthia J.
身体大小影响许多性状，但通常是以异速生长或不成比例的方式。例如，大型鸟类和哺乳动物物种循环的一些免疫细胞比基于简单几何原理的预期要多得多。到目前为止，这种超测量免疫缩放主要是在动物园居住的个体中描述的，因此免疫超异速生长是否具有任何自然相关性仍然不清楚。在这里，我们问野生鸟类的粒细胞和淋巴细胞异速生长是否与圈养物种中描述的不同。我们以前对鸟类免疫细胞浓度的异速生长研究是在条件温和且相当一致的圈养动物身上进行的。在自然条件下，感染、压力、营养、气候和无数其他因素都可能改变免疫特性，从而掩盖免疫细胞和身体大小之间的任何种间比例关系。与这种预期相反，我们没有发现证据表明圈养和野生物种之间的免疫细胞异速生长不同，尽管我们不得不依赖于细胞比例数据，因为野生物种的浓度数据不足。我们的研究结果表明，即使在多变和具有挑战性的自然环境中，免疫异速生长也会持续存在，并可能影响疾病生态和进化。
Body size affects many traits, but often in allometric, or disproportionate ways. For example, large avian and mammalian species circulate far more of some immune cells than expected for their size based on simple geometric principles. To date, such hypermetric immune scaling has mostly been described in zoo‐dwelling individuals, so it remains obscure whether immune hyper‐allometries have any natural relevance. Here, we asked whether granulocyte and lymphocyte allometries in wild birds differ from those described in captive species. Our previous allometric studies of avian immune cell concentrations were performed on animals kept for their lifetimes in captivity where conditions are benign and fairly consistent. In natural conditions, infection, stress, nutrition, climate, and myriad other forces could alter immune traits and hence mask any interspecific scaling relationships between immune cells and body size. Counter to this expectation, we found no evidence that immune cell allometries differed between captive and wild species, although we had to rely on cell proportion data, as insufficient concentration data were available for wild species. Our results indicate that even in variable and challenging natural contexts, immune allometries endure and might affect disease ecology and evolution.