Secondary Vectors:

Shipping/Packing Material

The Chinese mitten crab may be transported in various stages of its life cycle as a hitch-hiker in shipping and packing materials originating from infested areas. This is an easy vector through which to reduce the risk of invasions by educating both the suppliers and recipients of the packages about the dangers of such hitch-hikers and the proper handling and disposal techniques that should be used for potentially contaminated shipping / packing materials.

Scientific Specimen

No biological supply houses in the United States are allowed to carry Chinese mitten crabs and it is illegal to possess them, thus introductions through the release of scientific specimens is probably a limited vector. It is possible to acquire a permit to import them for research and testing. However, if such a high level of difficulty is required to get the permit and crabs, chances are the recipients will understand and utilize proper handling and disposal techniques.

Intentional Introductions

The Chinese mitten crab is valuable among many Asian communities, intentional introductions as a food supply should be considered as a viable vector that would most likely occur due to the release from illegal importation or possession of the crabs.

Natural Dispersal

Natural invasions, while they are a vector, are not open to prevention as a management effort. Natural invasion for the Chinese mitten crab can only occur on a watershed by adjacent watershed basis, thus naturally slowing and limiting natural invasions as a vector.

created 5/4/98