What distinguishes migratory fish species from non-migratory?

Migratory fish species are defined by their behavior of traveling significant distances, often between different habitats, to spawn or find food. This movement is typically driven by environmental factors such as temperature, food availability, and spawning requirements. The ability to migrate allows these species to access different ecosystems that may be more favorable for their lifecycle stages or to exploit seasonal resources.

In contrast, non-migratory species tend to remain in a limited area throughout their entire life cycle, typically thriving in a specific habitat that meets their needs year-round. While both migratory and non-migratory species can spawn in freshwater or saltwater and have varying lifespans, the defining factor that sets migratory fish apart is their movement across large distances rather than just their reproduction or longevity.

This distinction is crucial for conservation efforts and management practices, as migratory species often require the protection of multiple habitats and migration routes, while non-migratory species may have different habitat needs and conservation strategies.