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Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Zoology

2014

Purdue University

Articles 1 - 2 of 2

Full-Text Articles in Life Sciences

Habitat Effects On Chick-A-Dee Call Complexity, Jacqueline Renee Lynch Jul 2014

Habitat Effects On Chick-A-Dee Call Complexity, Jacqueline Renee Lynch

Open Access Theses

Past studies on the communication systems of species in urban environments (such as Common Starlings (Sturnus vulgaris), nightingales (Luscinia megarhynchos Brehm), brown-headed cowbirds ( Molothrus ater), Southern brown tree frogs (Litoria ewingii )) have shown multiple ways that species change vocal signaling behavior to adjust to urban habitats (e.g. alarm calls and singing). This study further investigates the changes in signaling in relation to the chick-a-dee call of the Carolina chickadee (Poecile carolinensis). A secondary goal of this study was to compare both the amount of information and rate of calling across seasons. Six different variants of chick-a-dee calls were used ...


Evaluation Of Forage Soybean Yield And Quality Characteristics And Potential As A Feed Resource For Developing Replacement Beef Heifers, Emily G. Taylor Apr 2014

Evaluation Of Forage Soybean Yield And Quality Characteristics And Potential As A Feed Resource For Developing Replacement Beef Heifers, Emily G. Taylor

Open Access Theses

Two agronomic studies were conducted to evaluate the yield and quality potentials of forage soybean (Glycine max ( L .)) grown with and without pearl millet (Pennisetum glaucum (L .)). Results indicate that there were no differences between row spacings of 18 cm or 36 cm and targeted populations of 469,500 seeds ha-1 or 234,750 seeds ha-1 on dry matter yield or overall quality of the forage soybean. While harvest date had significant effects on quality as the crop matured, forage soybean as a monoculture proved to be a very forgiving crop, and recovered in quality as maturity advanced into the ...