The smoking process, be it for ham or fish, does tend to give that "salty" flavour, but they don't necessarily salt the meat before they start the process, it could be that your taste buds interpret it this way.

Celery is also an ingredient which makes things taste salty, that's why you will find celery salt in the spice aisle. It's also a reason why celery is at the base of a a few sauces and most vegetable stocks.