What are barrier stations?

Question

have to do this for a research but they're not even on google... anyone help?

Answer 1

barriers are put up to prevent the movement of man and/or animals to places that they are not wanted.  The most common use that I have heard of for barrier stations is the placing of barriers to prevent the movement of non native fish into areas that they are not wanted.  See the attached article!

Hope this helps

Note: I googled fish barrier stations; you may want to do same as there are many many articles on this subject!