IIRC it is rare for catfish to breed in ponds. This is why most people consider them a put and take fishery in their pond
I do believe you are correct,however,my CC sucessfully spawned in my pond about 2 yrs ago.It was a really cool event to observe.Unfortunately,I wasnt smart enough to take pics of the courtship.
Point is,dont assume they wont spawn just because of location.As Bill says...it all depends!