The physiological costs of being colourful: nutritional control of carotenoid utilization in the American goldfinch, Carduelis tristis
The physiological costs of being colourful: nutritional control of carotenoid utilization in the American goldfinch, Carduelis tristis
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色彩缤纷的生理成本：美国金翅雀 (Caruelis tristis) 类胡萝卜素利用的营养控制
DOI：
10.1016/j.anbehav.2004.05.018
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发表时间：
2005
期刊：
影响因子：
2.5
通讯作者：
R. Parker
中科院分区：
文献类型：
--
作者：
K. McGraw;G. Hill;R. Parker
许多性选择的特征被认为是昂贵的生产，这确保他们诚实地传达信息的同种。类胡萝卜素色素沉着在许多鱼类和鸟类中被经典地认为是昂贵的性信号。人们经常认为，类胡萝卜素的颜色是“条件依赖性的”，一个人的营养或健康状况直接决定性状的表达。然而，很少有研究精确地调查了营养状况受损如何影响动物发展这些性感颜色的能力。在这里，我们研究了食物限制对雄性美洲金翅雀在羽毛生长期间生理加工类胡萝卜素的能力的影响。我们使用高效液相色谱法来确定换羽期间血液中循环的类胡萝卜素的类型和数量，以及新生长的彩色羽毛。我们表明，营养不足的影响程度，雄性金翅雀运输类胡萝卜素通过血液。食物限制的男性血液中的类胡萝卜素明显少于对照组。它们也减少了羽毛中的类胡萝卜素，羽毛颜色也变少了，但羽毛中类胡萝卜素的减少并没有明显超过血液中已经存在的抑制量。这些结果表明，这些黄色的雀形目鸟类从食物中提取类胡萝卜素（例如通过类脂胶束）或通过血液运输类胡萝卜素（例如通过脂蛋白）的方法对营养/能量状态的变化比代谢膳食色素或将代谢物沉积到羽毛中的机制更敏感。
Many sexually selected traits are thought to be costly to produce, which ensures that they communicate information honestly to conspecifics. Carotenoid pigmentation is classically considered as a costly sexual signal in many fish and birds. It is often argued that carotenoid colours are ‘condition dependent’, with an individual's nutritional or health state directly determining trait expression. However, few studies have investigated precisely how a compromised nutritional state affects an animal's capacity to develop these sexually attractive colours. Here, we studied the effect of food restriction on the ability of male American goldfinches to physiologically process carotenoids during the period of feather growth. We used high-performance liquid-chromatography to determine the types and amounts of carotenoids circulating in blood during moult as well as in newly grown colourful feathers. We show that nutritional deprivation affects the degree to which male goldfinches transport carotenoids through the bloodstream. Food-restricted males circulated significantly less blood carotenoids than controls. They also incorporated less carotenoids into feathers and grew less colourful plumage, but the decrease in plumage carotenoids did not significantly exceed the depressed amounts already present in blood. These results suggest that the means by which these yellow-coloured passerines either extract carotenoids from food (e.g. via lipoidal micelles) or transport them through blood (e.g. via lipoproteins) are more sensitive to changes in nutritional/energy state than are the mechanisms for metabolizing dietary pigments or depositing metabolites into feathers.
影响因子：
6.5
作者：
During, A;Hussain, MM;Harrison, EH
通讯作者：
Harrison, EH