you eat turkey meat, the turkey, insects that in turn an ate plant material. if you live entirely on turkey meat, calculate the amount of plant material, the insects would have to eat to feed enough turkeys, so you could gain one KG of mass (assuming the rule of 10 applies)
The rule of 10 states that only about 10% of energy is transferred from one trophic level to the next.
If we assume that the turkey meat is at the 3rd trophic level (since it eats the insects which eat the plant material), then we can calculate the amount of plant material needed to feed enough insects to feed enough turkeys to gain 1 KG of mass.
Let's say 1 KG of turkey meat is produced by consuming insects from the 2nd trophic level. To produce enough insects for this, the insects at the 1st trophic level would need to consume the plant material.
Assuming a conservative estimate of 10% energy transfer efficiency at each level, we can calculate the amount of plant material needed as follows:
1 KG (turkey meat) = 10 KG (insects) = 100 KG (plant material)
Therefore, to gain 1 KG of mass by eating turkey meat, the insects would have to eat 100 KG of plant material.