Stress associated with moving/handling fish is a major cause of mortality. Water quality is a key both as noted by Bill. The mortality can be quick or delayed (weeks).

See this

Fungus with pics and discussion of stress and cold water handling.

http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=137119&fpart=1

http://www.catchphotorelease.com/bass24.htm

http://www.salmonfishingforum.com/forums/showthread.php?p=61205

Last edited by ewest; 04/04/14 08:35 AM.