Habitat: Crayfish are highly dependent on their habitat for food, shelter, and reproduction. Factors that can limit crayfish habitat include pollution, habitat destruction, and competition from other species.
Food: Crayfish are omnivores and eat various foods, including plants, algae, invertebrates, and small fish. If food sources are limited, crayfish populations may decline.
Water quality: Crayfish are sensitive to water quality and can be affected by changes in temperature, pH, and oxygen levels.
Disease: Crayfish are susceptible to various diseases that can cause population declines.
Predation: Crayfish are preyed upon by various animals, including fish, birds, mammals, and other invertebrates.
Climate change: Climate change can affect crayfish populations by altering their habitat and food availability.
Overfishing: Crayfish are harvested for food and bait, and overfishing can lead to population declines.