Why do we need to use artificial feed in pond for fish culture​

Artificial feed is commonly added to aquaculture ponds to enhance growth and survival of juvenile fish. ... Feeding also introduces excessive nitrogen and phosphorus into ponds, which promote growth of nuisance phytoplankton and cause reduced oxygen conditions from aerobic decomposition of feed. Artificial feed is commonly added to aquaculture ponds to enhance growth and survival of juvenile fish. However excessive feeding may decrease fish growth and survival by reducing water quality and natural prey populations.

Explanation:

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

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