Question

В одной кладке самки дафнии бывает примерно 60 яиц.Спустя 15-20 суток из яиц вылупляються молодые дафнии ,которые вскоре сами способны откладывать яйца. Подсчитайте и запишите,сколько дафнии теоретически может появиться от одной самки за три летних месяца!

Answer 1

За три летних месяца - это значит за 93 дня. За это время может быть от 4 до 6 кладок .Т.к. в каждой кладке по 60 яиц, то за лето может вылупиться 240-360 дафний

Answer 2

Calculation of Daphnia Population Growth

To calculate the theoretical number of Daphnia that can appear from a single female over three summer months, we need to consider the number of eggs laid by the female and the time it takes for the eggs to hatch.

According to the information provided, a female Daphnia can have approximately 60 eggs in one brood, and it takes 15-20 days for the eggs to hatch into young Daphnia that are capable of laying eggs themselves.

Let's break down the calculation step by step:

1. Number of broods in three summer months: - Assuming each brood takes 15-20 days to hatch, we can estimate that a female Daphnia can produce around 3-4 broods during the three-month period. - Since we want to calculate the maximum theoretical number of Daphnia, we will consider the higher estimate of 4 broods.

2. Number of Daphnia from each brood: - Each brood consists of approximately 60 eggs. - Assuming all eggs successfully hatch into young Daphnia, we can calculate the number of Daphnia from each brood as 60.

3. Total number of Daphnia over three summer months: - To calculate the total number of Daphnia, we multiply the number of broods by the number of Daphnia from each brood. - In this case, the calculation would be: 4 broods * 60 Daphnia per brood = 240 Daphnia.

Therefore, theoretically, from a single female Daphnia, approximately 240 Daphnia can appear over three summer months.

Please note that this calculation assumes ideal conditions and does not take into account factors such as predation, competition, or other environmental factors that may affect the actual population growth of Daphnia.