What influences the choice of breeding system in laboratory animals?

The choice of breeding system in laboratory animals is primarily influenced by the general production of offspring desired. Different breeding systems can be utilized based on the specific goals of the research or breeding program. For instance, if a high quantity of offspring is needed for experiments, a breeding system that maximizes output may be chosen. This can involve factors such as the mating strategy (e.g., monogamous vs. polygamous pairings), selection of breeding stock, and control of breeding timing.

The other options, while they may have some relevance, do not as directly impact the primary objectives of a breeding program. The age of the animals might affect reproductive capabilities but is not the driving factor for selecting a breeding system. Similarly, the size of the breeding facility might impose certain practical constraints but does not dictate the strategic choice of breeding approach. Finally, dietary needs are important for the overall health and productivity of the breeding animals but are secondary to the overarching goal of offspring production when it comes to determining the breeding system itself.