Triplots showing Relative Invasion Risk of T. s. scripta, T. s. troostii, S. odoratus and K. subrubrum in a Northern Irish context. Invasion Risk calculated as a product of maximum feeding rate and Pet Propagule Pressure (PPP) with lifespan (a), with fecundity (b) and with lifetime fecundity (c); then attack rate and PPP with lifespan (d), with fecundity (e) and with lifetime fecundity (f). PPP for each species calculated by surveying 20 local pet shops and determining proportions of each species sold. Invasion Risk increases from bottom left to top right of each plot, with species ranked 1–4.

 
 
  Part of: Dickey JWE, Cuthbert RN, Rea M, Laverty C, Crane K, South J, Briski E, Chang X, Coughlan NE, MacIsaac HJ, Ricciardi A, Riddell GE, Xu M, Dick JTA (2018) Assessing the relative potential ecological impacts and invasion risks of emerging and future invasive alien species. NeoBiota 40: 1-24. https://doi.org/10.3897/neobiota.40.28519