Oxford Universitys Dr Sandra Baker has called for all moles traps and all break-back traps for rats and mice to be approved before they can be sold in the UK. Highlighting the double standards currently in place whereby all other spring traps must be welfare approved, she argued that research completed by her team makes a strong case for all traps to be tested and welfare approved before being marketed.
Dr Baker was speaking at the International Conference on Urban Pests (ICUP) 2017, held in Birmingham, UK
Dr Sandra Baker from Oxford University is calling for more humane rodent break-back and mole traps
|She explained that the voluntary system would allow manufacturers to put their traps through the existing system for regulated traps. Whilst the cost of this would be borne by manufacturers they would then benefit from being able to market their traps as ‘welfare approved’.
This would offer a clear choice for public and professionals alike and could well lead to a cascade effect whereby leading suppliers chose to only stock ‘welfare approved’ products, thus edging out the non-approved alternatives.
Double standards go back to the 50s
Sixty years on, Dr Baker argued that when traps used for species of similar cognitive and emotional ability do have to be approved, such double standards seem extremely difficult to justify.
She also reminded her audience of the study into the mechanical performance of rat, mouse and mole spring traps completed five years ago by her team at Oxford (see Pest issue 24: November & December 2012). The findings from that research clearly demonstrated that there is significant scope to reduce the welfare risk associated with these traps.
Impact momentum and clamping force were measured. Relative trap performance was shown to vary significantly. Some break-back traps ‘snap’ with a force that is up to eight times weaker than others and, in some, the clamping force was up to 5.5 times weaker. There was considerable overlap between the strongest mouse trap and the weakest rat trap which, given that rats are around 20 times heavier, is particularly concerning.
|The study also showed that there was no relationship between trap price and the mechanical performance, except for the talpa type of mole trap, where the more expensive traps did produce a greater clamping force.
Mole post-mortem study
The loss of strychnine means that trapping is now the preferred method of mole control and, with rodenticide stewardship encouraging pest professionals to consider other options such as trapping, before reaching for the rodenticide bucket, it seems likely that the use for break-back traps for rats and mice will also be rising.
However, despite all the evidence Dr Baker explained that there is no appetite to change the legislation. It is for this reason that she is calling for the voluntary approach.
Which traps are the most humane?
Unfortunately Dr Baker was unable to let us into that secret. All she could say was that the best break-back traps from a welfare point of view were those with larger opening angles and ‘double-peg’ spring mechanisms.
A further and very valid comment from the workshop audience came from Killgerm’s Rupert Broome who pointed out that there is already a major problem of cheap, imported break-back traps, manufactured to look identical to quality branded traps, coming onto the market. Such a voluntary system of approval would do nothing to tackle this problem. Those involved would simple re-create any approval logos or certification marks.
It’s an important point but, surely it would be a step in the right direction to at least know which of the branded traps offer the best kill and the voluntary approval system proposed would deliver that. The second step would then be to make sure you purchase your branded trap from a reputable supplier such as Killgerm.
New BPCA code in production