Question

Пара грачей приносит птенцам за сутки 40-45 г насекомых, что составляет около 1000 особей разных видов. Птенцов выкармливают 30 дней. Подсчитайте, сколько вредных саранчовых может уничтожить одна колония грачей в 200 гнезд за период выкармливания птенцов. Принять, что в данном районе грачи питаются преимущественно этими насекомыми.

Answer 1

200 гнезд по 1000 насекомых = 200.000 за 1 день.
За 30 дней будет 200.000*30=6.000.000.
Ответ: 6 млн насекомых.

Answer 2

Calculating the Impact of a Colony of Rooks on Locusts

Rooks are known to bring around 40-45 grams of insects to their chicks per day, which amounts to approximately 1000 individuals of various species. The chicks are fed for 30 days. Let's calculate the potential impact of a rook colony on the destruction of harmful locusts during the chick-rearing period.

Given that rooks predominantly feed on these insects in the area, we can estimate the impact based on the provided information.

Calculation:

To calculate the potential impact, we can use the average number of insects brought by a pair of rooks in a day and the number of days the chicks are fed.

Average insects brought per day by a pair of rooks: 40-45 grams, which is approximately 1000 individuals of various species.

Number of days the chicks are fed: 30 days.

Now, we can calculate the total number of insects brought by a pair of rooks during the chick-rearing period:

Total insects brought by a pair of rooks during the chick-rearing period: 1000 individuals/day * 30 days = 30,000 individuals.

Impact on Locusts:

Assuming that the rook colony consists of 200 nests, we can estimate the potential impact on harmful locusts during the chick-rearing period.

Number of rook nests: 200 nests.

Now, we can calculate the potential impact on harmful locusts:

Total number of insects brought by the rook colony: 30,000 individuals/pair * 200 pairs = 6,000,000 individuals.

Therefore, a colony of 200 rook nests can potentially destroy approximately 6,000,000 harmful locusts during the chick-rearing period.

This estimation is based on the assumption that rooks predominantly feed on these insects in the area.

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