Attributes for Successful Colonization
•Broad physiological tolerances for:
–Temperature extremes
–Low oxygen levels
–Fluctuations in salinity
–Turbidity and pollution
–Drought
•Feeding habits and diet:
–Diet composition
–Feeding schedules
–Vulnerability to predation
•Reproductive behavior:
–Rapid growth and maturation
–Extended or continuous breeding
–Multiple clutches
–Advanced parental care
Source: Taylor et al. 1984
What makes a species a successful invader?  Every animal or species cannot possibly survive in every instance of an introduction.  Alien species that are successful often exhibit a broader flexibility in characteristics that enhances its chance for survival in a new environment.