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in Olympiad by (76.3k points)

Fishes such as Salmon are called as anadromous fish. They are born in fresh water. However, then they migrate to the sea and spend most of their life in the sea. They return to fresh water to spawn. On the contrary, catadromous fishes such as Eels do the opposite. They live in fresh water for their entire life. They migrate to the sea to spawn.

Which one of the following strategies will Salmon adopt in order to manage the problem of osmoregulation

when it is in the sea ?

(a) Salmon drinks profusely in sea and it drinks feebly in fresh water.

(b) It produces large volume of dilute urine in sea water

(c) In sea water, gills filter NaCI which is absorbed selectively into its body.

(d) The mode of excretion of Salmon is changed from ammonia to uric acid.

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1 Answer

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by (71.4k points)

(a) Salmon drinks profusely in sea and it drinks feebly in fresh water.

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