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科学美国人60秒: 鸟喙的形状不仅仅取决于食物

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Bird Beak Shapes Depend on More Than Diet

鸟喙的形状不仅仅取决于食物

The shape of the beaks of different species of Galapagos finches played an important part in Darwin’s conception of natural selection.“In our field there is this presumption that the beak shape…in birds is quite correlated with what they eat and how they eat it. So, their feeding ecologies.”

加拉帕戈斯群岛不同品种雀喙的形状在达尔文的天然选择概念中起了重要作用。“在咱们的研讨范畴,有这样一种假定:鸟类的喙形……与它们吃什么以及怎么吃休戚相关。”所以,它们的饮食生态。”

Guillermo Navalón, a PhD student at the University of Bristol in the U.K., and a co-author of a new study that found that the connection between beak shape and diet isn’t as tight as we thought. The study is in the journal Evolution.

吉尔莫·纳瓦隆,英国布里斯托尔大学的博士生一项新研讨发现,喙形和饮食之间的联络并不像咱们幻想的那么严密。这项研讨宣布在《进化》杂志上

Navalón and his colleagues analyzed photographs of museum specimens of 176 bird skulls. They looked at beak shape and size in almost all of the orders of modern birds, and compared the beaks with other factors, such as feeding behavior and body size. And they found that the beak shape was indeed somewhat tied to what birds feed on and how they eat it—but the relationship was actually surprisingly weak, accounting for just 12 percent of beak shape variation.

纳瓦隆和他的搭档剖析了176个鸟类头骨标本的博物馆相片。他们研讨了简直一切现代鸟类的喙的形状和巨细,并将喙与其他要素进行了比较,比方进食行为和体型。他们发现,鸟喙的形状确真实某种程度上与鸟类以什么为食以及它们怎么进食有关——但这种联系实际上出奇地弱小,只占鸟喙形状改变的12%。

“The explanation that we extract from there is that the beaks are basically surrogate hands in the birds. They are used for a plethora of different functions beyond feeding ecology. Like the beak in general in birds have many other functions. So they use it for display, nest construction, singing, thermoregulation in some cases like toucans or like hornbills…so there is like a lot of factors that probably have intervened in the evolution of beaks in birds.”

“咱们从中得出的解说是,喙基本上是鸟类的署理手。除了喂食生态外,它们还被用于许多不同的功用。就像鸟类的喙一般,还有许多其他的功用。所以他们用它来展现、筑巢、歌唱、调理体温,在某些情况下,比方巨嘴鸟或犀鸟……所以可能有许多要素影响了鸟类喙的进化。”

Bird Beak Shapes Depend on More Than Diet

The shape of the beaks of different species of Galapagos finches played an important part in Darwin’s conception of natural selection.“In our field there is this presumption that the beak shape…in birds is quite correlated with what they eat and how they eat it. So, their feeding ecologies.”

Guillermo Navalón, a PhD student at the University of Bristol in the U.K., and a co-author of a new study that found that the connection between beak shape and diet isn’t as tight as we thought. The study is in the journal Evolution.

Navalón and his colleagues analyzed photographs of museum specimens of 176 bird skulls. They looked at beak shape and size in almost all of the orders of modern birds, and compared the beaks with other factors, such as feeding behavior and body size. And they found that the beak shape was indeed somewhat tied to what birds feed on and how they eat it—but the relationship was actually surprisingly weak, accounting for just 12 percent of beak shape variation.

“The explanation that we extract from there is that the beaks are basically surrogate hands in the birds. They are used for a plethora of different functions beyond feeding ecology. Like the beak in general in birds have many other functions. So they use it for display, nest construction, singing, thermoregulation in some cases like toucans or like hornbills…so there is like a lot of factors that probably have intervened in the evolution of beaks in birds.”


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