Question

Масса тела дельфина 50кг. Предположим,что 10%энергии,заключённой в съеденной дельфином пище,используется для построения его тела,остальные 90%расходуются на различные процессы жизнедеятельности.Определите массы съеденной дельфином рыбы,зоопланктона и фитопланктона,участвующих в данной пищевой цепи.

Answer 1

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Answer 2

Calculation of Masses of Consumed Fish, Zooplankton, and Phytoplankton by the Dolphin

To determine the masses of fish, zooplankton, and phytoplankton consumed by the dolphin, we can use the given information that 10% of the energy obtained from food is used for building the dolphin's body, while the remaining 90% is used for various life processes.

Let's assume that the dolphin's body mass is 50 kg. Therefore, 10% of the energy obtained from food is used to build its body, which is equivalent to 5 kg. The remaining 90% of the energy is used for life processes.

To calculate the masses of fish, zooplankton, and phytoplankton consumed, we need to consider the energy transfer efficiency between trophic levels in the food chain. The energy transfer efficiency typically ranges from 5% to 20% in aquatic ecosystems, with an average of around 10%.

Let's use the average energy transfer efficiency of 10% to calculate the masses of the consumed organisms.

1. Mass of Fish Consumed: - The energy obtained from fish is used for building the dolphin's body and for life processes. - Since 10% of the energy obtained from food is used for building the dolphin's body, the remaining 90% is used for life processes. - Considering the average energy transfer efficiency of 10%, we can calculate the mass of fish consumed as follows: - Mass of fish consumed = (Mass of dolphin's body / Energy transfer efficiency) * (Energy used for life processes / Energy obtained from fish) - Mass of fish consumed = (50 kg / 0.1) * (0.9 / 0.1) = 450 kg

2. Mass of Zooplankton Consumed: - The energy obtained from zooplankton is used for building the dolphin's body and for life processes. - Using the same calculations as above, we can determine the mass of zooplankton consumed: - Mass of zooplankton consumed = (Mass of dolphin's body / Energy transfer efficiency) * (Energy used for life processes / Energy obtained from zooplankton) - Mass of zooplankton consumed = (50 kg / 0.1) * (0.9 / 0.1) = 450 kg

3. Mass of Phytoplankton Consumed: - The energy obtained from phytoplankton is used for building the dolphin's body and for life processes. - Using the same calculations as above, we can determine the mass of phytoplankton consumed: - Mass of phytoplankton consumed = (Mass of dolphin's body / Energy transfer efficiency) * (Energy used for life processes / Energy obtained from phytoplankton) - Mass of phytoplankton consumed = (50 kg / 0.1) * (0.9 / 0.1) = 450 kg

Therefore, based on the given information and assuming an average energy transfer efficiency of 10%, the dolphin would consume approximately 450 kg of fish, 450 kg of zooplankton, and 450 kg of phytoplankton.

Please note that these calculations are based on assumptions and average values. The actual values may vary depending on various factors such as the specific energy transfer efficiency and the diet composition of the dolphin.

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