I found this article a while back. It was written in the 19th century about shad fishing the Susquehanna River in the Bloomsburg area. It discusses a shad fishing industry during the spring, as the shad worked as far up the river as New York. These days are long gone with the introduction of barriers along the river. An interesting read...
http://www.colcohist-gensoc.org/Essays/sha..._bloomsburg.pdf
The link is hosted by the Columbia County Historical and Genealogical Society:
http://www.colcohist-gensoc.org/
