Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 6000 J of animal material. The owl loses 2630 J in feces and owl pellets and used 3000 J for cellular respiration. What is the production efficiency of this owl? Answer the question with one decimal place.
The owl consumes = 6000 J
In feces loses = 2630 J
In cellular respiration = 3000 J
Net secondary production is the energy stored in the biomass.
Net secondary production= 6000 -(2630+3000) J
= 6000 - 5630 J
= 370 J
Assimilation of primary production = 6000 J
Production efficiency of the owl
= Net secondary production × 100 % Assimilation of primary production
= 370 × 100%. 6000
= 6.1 %
Thus the production efficiency of the owl is 6.1%
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