Hegyi Gergely, Laczi Miklós, Kötél Dóra, Csörgő Tibor
Department of Systematic Zoology and Ecology ELTE Eötvös Loránd University Budapest Hungary.
Department of Anatomy, Cell and Developmental Biology ELTE Eötvös Loránd University Budapest Hungary.
Ecol Evol. 2020 Oct 12;10(23):13087-13094. doi: 10.1002/ece3.6898. eCollection 2020 Dec.
Sexually dimorphic ornamental traits are widely regarded as indicators of nutritional condition. However, variation of nutritional condition outside the reproductive and the ornament production seasons has rarely been considered, although it affects the generality of information content, especially for ornaments that may be used across the year. We measured several indicators of migratory and molt condition in male and female blackcaps () during their autumn migration, and quantified their crown reflectance. We detected robust correlations between migratory and molt condition indices, and the correlation structure was similar in the two sexes. Furthermore, the across-season measure of body condition was positively related to the darkness of the black crown in males, while being unrelated to reflectance traits of the reddish crown in females. Our results reinforce the possibility that some melanin-based ornaments may be year-round indicators of individual quality via their dependence on nutritional condition.
两性异形的观赏性特征被广泛视为营养状况的指标。然而，尽管营养状况的变化会影响信息内容的普遍性，特别是对于可能全年都被使用的观赏性特征，但生殖季节和观赏性特征产生季节之外的营养状况变化却很少被考虑。我们在雄性和雌性黑顶林莺秋季迁徙期间测量了几个迁徙和换羽状况的指标，并对它们头顶的反射率进行了量化。我们检测到迁徙和换羽状况指数之间存在显著相关性，且两性的相关结构相似。此外，身体状况的跨季节测量与雄性黑色头顶的颜色深度呈正相关，而与雌性红色头顶的反射率特征无关。我们的结果强化了这样一种可能性，即一些基于黑色素的观赏性特征可能通过其对营养状况的依赖而成为个体质量的全年指标。
