There will only be as many otters in an area as there is enough prey to support them...which is why they live in very low densities over a large territory.
That’s the nuts and bolts of the problem. We are talking Cheshire here! There is an abundance of prey that will support lots of Otters. Sadly very little of it lives in the Otters natural environment.
The major rivers and their tributaries were open sewers within my memory. I remember the Tame, a tributary of the Mersey, running all colours of the rainbow and quite often being so full of detergent that each weir looked like a giant bubble bath.
Yes things have improved beyond recognition but the recovery process has only just begun. We can not pretend that all is well, just because we have cleaned up the rivers enough to support a few coarse fish. What is being proposed here, is introducing a top predator into an environment which does not have the food chain in place to support it.
Even if there was the food chain in place, there is valid argument against their re-introduction because the environment has changed so much. What is that line in Jurassic park? Words to the effect “they were so busy working out if they could, that they never stopped to think if they should?”
Cheshire is not an isolated location, where the Otters will stay in situ at the release site because it’s Hobson’s choice. Quite the opposite Cheshire’s rivers could prove to be the ideal highway to easy pickings. Why would Otters try to eek out an existence in an environment virtually devoid of its natural choice of food, when they are in spitting distance of a captive audience of big fat fish that have no real natural predators or the resultant survival instincts? In fact even if the food chain was in place are they going to waste energy hunting Eels all day long to survive, or just plop into a lake and grab a big fat fish?
I don’t know if Otter problems are the result of introductions or natural colonisation? What we do know is that they are a problem. At the very least there is enough evidence of problems to justify a ban on further introductions, perhaps even a case for control in certain circumstances? Imagine the outrage if they were eating cats?
