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:

Tax Revenue

The income that is gained by governments through taxation, which is used to fund public services, government obligations, and infrastructure projects.

Tax

Mandatory financial charges imposed by a government on individuals, corporations, or transactions to fund public expenditures.

Good

A tangible product or service that satisfies some human desire or need, which can be bought or sold.

Units

Basic quantities or measurements used as standards for expressing and comparing the quantity of physical properties.