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  • Writer's picturePatrick Aust

Calories to crude protein ratios

Understanding the finer linkages between food systems and biodiversity conservation is important in our search for sustainability.

Here’s an important but poorly understood one: metabolic energy to crude protein ratios in livestock feeds:

~Feed contributes 70% of poultry production costs

~60% of poultry feed is made up of cereal

~Cereal comprises 80% carbohydrates

~Carbohydrates provide most of the metabolic energy required for poultry production

By comparison, python production requires:

~ 90% less metabolic energy

~ roughly the same diet as poultry barring the cereal component

In other words, if we substitute chicken fillets with python fillets, we could potentially substitute over 50% of our costly monocultures with rewilding projects without losing a gram of cheap animal protein!

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