Unexpected Limited Gene Flow and Possible Local Phenotypic Adaptation in the Native Crab Cyrtograpsus angulatus Along the Southwest Atlantic Coast

Key Points

• Limited gene flow was observed, indicating possible reproductive isolation among crab populations.
• Genetic analysis highlighted distinct phenotypic adaptations that could arise from local environmental pressures.
• Observed adaptations suggest a strong influence of local habitat factors on survival and reproduction among crab populations.
• Future research may clarify the role of genetic variation in influencing phenotypic traits for this species.