Dave....nothing "natural" about why their numbers diminished ....surely that was because of the stuff we were putting into rivers, thus decimating their food source?
We are now reintroducing their food at a massive rate of knots... so why does it not make sense to have otters there (agreed in controlled numbers) to redress the natural equilibrium???
Stuart,
Most of the original otters did indeed die off as a natural result of the problems we presented them with, and as you say, the main problem was lack of prey fish due to pollution. However, there is also the problem of habitat loss caused by thoughtless councils allowing building on water meadows, wetland drainage, rivers being culverted so that they can be built over, E.A. flood relief vandals causing untold damage (including canalising of rivers)...the list goes on and on.
The problem is your use of the word 'were' when talking about the muck we pump into our rivers. Do you seriously think that we have stopped doing that? We still pump huge amounts of crud into our rivers...the amount of raw sewage that is released into our waters under various pretexts is astounding, and the 'accidental' chemical releases, where the 'fine', even if the guilty parties are aprehended, is less than the cost of legal disposal
. Why on earth do you think the EU is issuing all sorts of threats of dire action if we do not very soon bring our waterways up to at least the required minimal cleanliness standards?
"We are now reintroducing their food at a massive rate of knots" ...Where on earth did that idea come from? The only current stocking of fish into our rivers is carried out to replace the losses caused by the various pollutions that STILL happen on a daily basis, and the huge mortality rate that the cormorants WE starved out of their natural hunting grounds are wreaking, and the various other new problems we have unleashed. In many cases the restocking doesn't even keep pace with these losses.
The only other fish we are introducing
"at a massive rate of knots" are various types of carp (most of which are sterile) that fishery owners are shovelling into their manufactured mud-hole fisheries. These fisheries cost a fortune to build, and to stock, and are obviously run as commercial enterprises. I assume you are not naive enough to imagine that these business men are going to welcome otters into their fisheries to eat their valuable stock
There have already been several of these fishery owners that have gone bankrupt due to the predations of cormorants and otters...I doubt very much that too many others will stand by and watch this happen on their patch without reacting in one way or another
So...where exactly are these 'new' food sources that you talk about that make reintroduction of otters a sensible proposition? These critters have now decimated many valuable river fisheries, simply because the predator/prey equasion is WAY out of sinc...Adams Mill being probably the most famous, and thus most talked about example of this problem in action.
I fish several lakes where there are now NO silver fish present, only large tench, bream and carp are left, and that is purely down to cormorants. Can you imagine what would happen if otters now move into those fisheries?
As Paul boot has so rightly pointed out, this IS the sad state of affairs that we have been presented with, and for various well talked about reasons, there is NOTHING we can do about it...we must put up, and shut up.
However...I do NOT need people like you telling me that this is a 'natural' situation, and that I should in effect rejoice in that fact because it is all my own doing
Cheers, Dave.