Does New Zealand's bird trade pose an invasive species risk?

[Swampy]

An interesting article I just came across:
Escaped pet parrots threaten New Zealand’s vulnerable native birds – why a ban is the best solution

...about this paper in the Journal of Applied Ecology:
https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2664.14341

The authors make some, it seems to me, very bold claims about propagule pressure and extrapolate from a limited data set, and use this to suggest bans for certain species with invasive potential.

What are people's thoughts on this? I realise I'm approaching this as quite a sceptic, do people feel these findings are valid?

 

[lintworm]

An interesting article I just came across:
Escaped pet parrots threaten New Zealand’s vulnerable native birds – why a ban is the best solution

...about this paper in the Journal of Applied Ecology:
https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2664.14341

The authors make some, it seems to me, very bold claims about propagule pressure and extrapolate from a limited data set, and use this to suggest bans for certain species with invasive potential.

What are people's thoughts on this? I realise I'm approaching this as quite a sceptic, to people feel these findings are valid?

A quick glance of the paper and with lessons from Europe with psittacines this does seem a valid concern and a ban on ring-necked and alexandrine parakeets would make sense. In Europe they are still limited to man-made habitats, but for fruit growers they could pose a huge risk and especially in New Zealand that would not be wanted. The best way to prevent invasions is preventing escapes and with current levels of escapes, a ban would be most effective.