I think the initial use in the 50's was more for rabbit control wasn't it? And if I remember correctly it did do a good job of that and the problem has generally been kept in check since then.
I can see that in plague situations it is very effective and is a good tool. I'm not so convinced of it's wide spread application at other times though. I've not seen the cost/benefit analysis done of by-kill of protected species and their recovery rates compared to the target species kill and recovery rates. There does appear to be differences in outcome in various locations with different infestation levels and bait repellent use. Things would be a lot better with greater transparency so that these things can be checked.
Now off to pull splinters from my arse, ... from sitting on the fence so much.
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