What is hypophysation?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Hypophysation**: Hypophysation is a technique used in aquaculture for the breeding of fish.

2. **Method of Hypophysation**: This method involves the injection of substances derived from the pituitary gland into the fish.

3. **Purpose of the Injection**: The injections contain gonadotropin hormones, which are crucial for inducing the breeding process in fish.

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