Salmon fish hatcheries add a harmless perfume (morpholine) to a stream when they release young fish. When the fish mature, they attract them back to the home stream by using this chemical (in nature the fish smell the unique odors of soil and trees along the home stream). In effect, the hatchery biologist is using

A. the fish's inborn instincts to relocate its own stream.

B. the fish's inborn instincts to relocate its own stream.

C. an experiment based on the ability of fish to learn by trial and error.

D. chemotropisms.

The options are not complete

Salmon fish hatcheries add a harmless perfume (morpholine) to a stream when they release young fish. When the fish mature, they attract them back to the home stream by using this chemical (in nature the fish smell the unique odors of soil and trees along the home stream). In effect, the hatchery biologist is using

A. the fish's inborn instincts to relocate its own stream.

B. the fish's inborn instincts to relocate its own stream.

C. an experiment based on the ability of fish to learn by trial and error.

D. chemotropisms.

E. Imprinting

Answer:

E. Imprinting

Explanation:

Imprinting is kind of rapid responsive learning occurring at a particular stage in life, whereby the organism establishes a behavioral pattern such as recognition or attraction to it kinship or a substitute.

In the Salmon fish hatcheries (a building where hatching of fish or poultry eggs is artificially controlled for commercial purposes), the addition of a harmless perfume (morpholine) to a stream when they release young fish is a substitute to the Salmon fish kinship. When the fish mature, i. e at a particular stage of their life, they attract them back (a form of attraction to it own kind) to the home stream by using this chemical.