Energy Metabolism help please! A researcher is interested in in metabolic rates

Question

Energy Metabolism help please!

A researcher is interested in in metabolic rates of mocking birds. She determines resting metabolic rate is 127 kj per day. She knows that various activities raise metabolic rates by the following magnitudes.

Foraging = 3.4x
Flying = 2.2x
Singing = 1.4x

She obtains following results for the birds daily activities from the field (mean % of time spent on each activity per day).

Foraging = 32%
Flying = 6%
Singing = 40%
Misc. activity = 22%

Calculate the daily energy cost for each of the mockingbirds activities.

Calculate the birds total daily energy expenditure in the wild.

Explanation / Answer

Based on the given data,

The resting metabolic rate is 127 kJ per day, so the increase in metabolic rates is as follows:

To calculate energy expenditure, consider the following formula:

Total energy expenditure = energy expenditure value of activity x duration of activity in minutes x your body weight in pounds

Convert the mean % of time spent into minutes, thus

So, for respective time the energy expenditure is:

The mean body weight of a normal mocking is 0.108027 pounds

The daily energy cost for each of the mockingbirds activities:

The total daily energy expenditure in the wild is:  

Foraging + Flying + Singing + Misc. activity

Thus,

1.6 + 0.035 + 1.07 + 1.04 = 3.754 Kcal or 15.7172472 kJ/24 hours in the wild

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