Artificial Nest Have Often Been Used When Biologists Study Predation

question 6

Essay

Artificial nest have often been used when biologists study predation on birds.It is usually assumed that predators will respond to artificial nests in the same way they do to real birds' nests.A recent experiment was performed to check this assumption for predators of the American robin (Turdus migratorius)by comparing the egg loss in three experimental treatments: (1)natural robin's nests, (2)artificial wicker-basket nests placed 30 meters in a random direction from natural robin's nests, and (3) artificial wicker-basket nests placed in a 180 m by 240 m grid around robin's nests. The data below are cumulative counts of eggs predated (stolen or broken and eaten)at 5, 10, and 15 day points of the experiment.

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Definitions:

Underdeveloped Countries

Countries that have yet to industrialize, or that have been intentionally restricted in their development by developed nations.

Developing Countries

Nations with a lower standard of living, underdeveloped industrial base, and low Human Development Index relative to other countries.

Undeveloped Countries

Countries with poor economies; problematically implies a lack of economic talent or exposure.

Dependency Theory

A theoretical perspective that criticizes the global economic system as perpetuating inequality between developing and developed nations.