Scottish Natural Heritage have released a statement to ITV Border describing the risk of crayfish transfer to silage bales as "very small."
"It is the first time that we have come across reports of signal crayfish being transported in silage bales.
"Although it's feasible that crayfish might get caught up in the bales the risks of transfer of live crayfish between river catchments is very small."
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Pictures from the commemoration marking the centenary of the Quintinshill rail disaster, which killed more than 200 people, is underway.
The 100th anniversary of Britain's worst rail disaster will be commemorated at a special service today.