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首页> 外文期刊>The Wilson Bulletin >VARIATION IN CAROTENOID-BASED COLOR IN NORTHERN FLICKERS IN A HYBRID ZONE
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VARIATION IN CAROTENOID-BASED COLOR IN NORTHERN FLICKERS IN A HYBRID ZONE

机译：杂交带北穗体中类胡萝卜素的颜色变化

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摘要

We studied variation in the carotenoid color of flight feathers of hybrid Northern Flickers (Colaptes auratus) and its correlation with reproductive performance and survival. Color scores provided by a digital camera revealed in 218 individuals a continuous spectrum from yellow to red. Males tended to be slightly redder than females. Within individuals, an analysis of color change with age revealed that males, but not females, became redder with age. Except for yearling females, body condition did not improve with age, suggesting that color is not linked to body condition measured during incubation. We did not detect any correlations between feather color and measures of reproductive performance, such as clutch size, hatching success, or fledging success, or return rate to the study area. In a hybrid population where intraspecific variation in color is controlled partly by genes, hue or brightness may not be a useful signal of individual quality, contrary to other studies of birds. About 25% of flickers had one or more tail feathers that differed from the rest of the plumage. In each case, the "odd" feathers were paler or yellower in color and may have been caused by diet or stress when the leathers were lost and regrown during winter. Such odd colors support the hypothesis that red carotenoid pigments are costly to maintain under stressful conditions.
机译：我们研究了杂交北洋F（Colaptes auratus）的飞行羽毛的类胡萝卜素颜色的变化及其与生殖性能和生存的相关性。数码相机提供的色彩评分在218个人中揭示了从黄色到红色的连续光谱。男性往往比女性略红。在个体中，随着年龄变化的颜色分析表明，男性（而非女性）随着年龄的增长而变红。除一岁雌性外，身体状况并未随着年龄的增长而改善，这表明颜色与孵化过程中测得的身体状况无关。我们没有发现羽毛的颜色与生殖性能的度量之间的任何相关性，例如离合器的大小，孵化成功或成雏成功或返回研究区域的比率。与其他鸟类研究相反，在杂种种群中，种内颜色差异部分受基因控制，色相或亮度可能不是个体品质的有用信号。大约25％的闪烁具有一根或多根与其他羽毛不同的尾羽。在每种情况下，“奇数”羽毛的颜色都较浅或偏黄，并且可能是由于冬季丢失或重新长出皮革时饮食或压力引起的。这种奇特的颜色支持这样的假设，即在压力条件下维护红色类胡萝卜素的成本很高。

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