I researched the ruddy duck for a presentation a uni (ended up doing one about badgers and TB instead though as a mate also did the ruddy duck one). It was quite interesting really as there seems to be little evidence that our ruddy ducks go to the continent and hybridise with the white headed duck. When you add to that the costs of culling ruddy duck (or most things for that matter) it does seem to not be the best of ideas. Anyone know if the ruddy duck cull is still going on en masse or if it is up for review sometime soon? Quite sure I read somewhere it had been reviewed and scaled down a lot or is up for review and is likely to be stopped, but I am not 100% positive.
I did read somewhere that the decision to cull the ruddy duck in the UK was to kind of keep the peace with Spain, so some think it is all political. I could not possibly comment upon such things, but it is something I did come across.
Given peoples point of view on introduced species such as canada geese and grey squirrels it does seem like we feel we can pick and choose which alien invaders we want to keep. Surely all introduced species should be treated equally? All would have some impact upon their ecosystem as all eat something, so might at least decrease food available for a native species, if not eat a native species. It is just some introduced species and their effects are are not deemed as good/bad as others.
Personally I feel that Ruddy ducks do not belong here and it is only because they don't kill a native macro organism that we think they are doing no harm. At the same time, killing them for hybridising with a species in Spain, when evidence suggests that it is not UK birds doing that, seems the wrong reason to start shooting them. It really is a tough one to call. If their population goes unchecked here, they might get to Canada geese proportions (population wise) and start out competing native species for food or breeding sites. It really is something that needs monitoring, but the reasons given at the moment for culling them seem wrong to me.
Interesting topic introduced species, there is a list a mile long of where it all goes wrong (brown tree snake in Guam possibly being the worst ever). It is also one of them things that has people equally split between killing introduced species and letting them get on with it. Might ruffle some feathers this one, it did at uni.
Adam