What is a requirement of intensive breeding systems?

In intensive breeding systems, the key requirement is that male and female animals must remain together continuously. This arrangement facilitates successful mating and maximizes breeding efficiency by ensuring that females have regular opportunities to become pregnant. Continuous cohabitation also helps in achieving synchronized breeding cycles, which is essential in a well-managed breeding program.

Options that suggest separating animals or restricting mating opportunities are not suitable for intensive breeding systems. Likewise, limiting breeding sessions or rotating partners could disrupt breeding patterns, resulting in reduced offspring production. Thus, the chosen answer aligns with the fundamental principles of maximizing reproductive output in laboratory animal management.