Catch and release research.

[speyfly]

Here is some great information regarding C&R on trout and trout mortality due to poor release habits by anglers.
http://www.dec.state.ny.us/website/dfwmr/fish/troutcar.html
http://www.lifr.org/CatchRelease.htm
http://www.asf.ca/release/science.html

[nkambae]

Speyfly,
Thanks again! That third link you have listed has got some good science to it and I believe translates easily to whatever species we fish for most.