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mixer [17]
3 years ago
11

Why are catfish and carp found at the mouth of a river, while trout are found nearer the source?

Biology
2 answers:
uysha [10]3 years ago
8 0
<span>Catfish and carp require less oxygen than trout. The mouth of a river usually has less oxygen and the area closer to the source has more oxygen, so since catfish and trout require more oxygen they typically are found at the source.</span>
guajiro [1.7K]3 years ago
7 0

Answer:

The correct reason would be "the levels of dissolved oxygen at the mouth of the river and at the source of the river".

The mouth of the river is the region where it flows into the ocean, lake, another river, reservoir, sea et cetera. The level of dissolved oxygen in this region is too low to support great biodiversity.

Organisms like catfish and carp can survive here due to their low oxygen demand. For example, catfish can survive in water with an oxygen content of 2.5 parts per million.

In contrast, the level of dissolved oxygen is higher at the source of the river. Organisms like trout are found here due to their high oxygen need. For example, rainbow trout require minimum 5-6 parts per million dissolved oxygen for its survival.

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2 years ago
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answer 1:

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Air Pollution

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answer 2:

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anwer 3:

advantages are

1_A Fuel Supply That Never Runs Out

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4_A Cheaper Form of Electricity

5_Renewable Energy Creates New Jobs

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anwer 4:

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You could do this by:

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3 0
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8 0
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Answer:

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