What drives the evolution of bird nest structures? -- ScienceDaily

What drives the evolution of bird nest structures? -- ScienceDaily

Hall was completing his Ph.D. work on the neurobiology of nest-building behavior when he noticed that very little work had been done on trying to understand why different bird species build such drastically different nest structures. "I thought this was strange," he explains, "because the shape of a nest seems to be the most striking and diverse feature across bird species." The hypothesis that dome-shaped nests resulted from the increased predation risk when competition for nest sites led some birds to begin nesting on the ground was first proposed almost twenty years ago, but techniques at the time did not provide a way to test it. Applying statistical techniques he had previously used in his neurobiology study, Hall and his colleagues collected previously published descriptions of the nests of 155 species of babbler and mapped nest height and structure to the birds' family tree.

Their analysis confirmed that babblers' ancestors likely built above-ground, cup-shaped nests, and that the addition of a dome to cover the nest corresponded with switching to nesting at ground level. "This new study by Hall, Street, Auty, and Healy looks at the evolution of two key aspects of animals as architects: how they shape their homes and where they put them. It shows very nicely how we can take advantage of recent progress in avian phylogenetics to test ideas about the evolutionary history behind the modern-day co-occurrence of particular pairs of traits," according to Don Dearborn, an expert in the evolution of reproductive strategies in birds. "I am very happy how well nest structure integrated into our analyses, but this study is only the tip of the iceberg, and we hope future work can use a similar approach to identify other factors that may have influenced the evolution of nest structure," adds Hall.


Welcome to SUV System Ltd!

SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.

We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.

SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com

Electronic Components distributor:http://www.suvsystem.com

Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html

IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html

LED Distributor:http://www.suvsystem.com/l/LED-1.html

Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html

Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html

Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html

Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html

SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc

we are focus on the following fields,and hope we can help you.


Transistors Freescale ROHM Resistors LED Transistors Low Ohmic Resistors NEC Diodes SANYO IC Discrete Semiconductor Transistors Kingbrigt LED ST Transistors HARRIS IC Resistor Arrays Chip Fuses Rectifier Diodes TI IC Diodes Inc Renesas parts IC Thick Film Resistors Zener Diodes VISHAY IC IR Diodes NXP Transistors Digital Transistors Fleld Effect Transistors ELPIDA IC Dialight LED Bipolar Transistors Current Sensors Resistors LED part DIODES Transistors Voltage Regulators Transistors TOSHIBA Diodes LITTELFUSE Diodes Schottky Diodes MAXIM IC components Industrial IC ON Transistors LINEAR IC Switches
http://www.suvsystem.com/a/45723.aspx

Comments

Popular posts from this blog

指纹浏览器定制开发全面助力企业安全与智能升级

跨境电商资讯:一文带你走进亚马逊19大海

利用 Google 购物广告促进销量的初学者指南