Species-displacement

Guides

Orconectes rusticus
Rusty Crayfish
Orconectes rusticus, commonly known as the rusty crayfish, is a freshwater crayfish native to the Ohio River basin in the United States. The species has become a highly successful invasive organism in northern lakes and streams across North America, where it displaces native crayfish through aggressive behavioral dominance. Research has documented its capacity for learned associations involving predator cues, complex social recognition systems using chemical signals, and flexible spatial learning. The species' invasion success stems from a combination of behavioral traits including high aggression, broad habitat tolerance, and efficient resource utilization.
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