# Determine what is the maximum number of parasites that can feed in the host’s body if the mass of one parasite is 10 g

Determine what is the maximum number of parasites that can feed in the host’s body if the mass of one parasite is 10 g, and 1 g of his body contains 200 kcal of energy. The owner is a herbivore with an average body weight of 40 kg, 1 kg of which contains 2000 kcal of energy. (The process of transformation of energy from one trophic level to another proceeds in accordance with Lindemann’s rule.) 1) Let’s make a diagram of the food chain:
grass -> herbivore -> parasites.
2) Let’s calculate how much energy is contained in the body of one owner:
1 kg contains 2000 kcal 40 kg – x kcal x = 80,000 kcal.
3) Let’s calculate how much energy is contained in the body of one parasite:
1 g contains 200 kcal 10 g – x kcal x = 2000 kcal.
4) According to Lindemann’s rule, parasites will get 10% of the level energy from the herbivorous animal, i.e.
80,000 kcal: 10 = 8,000 kcal.
5) Let’s calculate how many parasites can feed on one host:
8000 kcal: 2000 kcal = 4. Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.