Here are some additional links that may help you with your research.

ttp://www.ardeerhunting.com/editor.html
http://www.cfr.msstate.edu/facultyan...maraispubs.htm
http://www.cfr.msstate.edu/facultyan...maraispubs.htm
http://www.mdwfp.com/
http://www.tpwd.state.tx.us/conserve...ke_harvest.pdf

http://www.mississippigameandfish.com/ms_aa122902a/


http://www.tpwd.state.tx.us/conserve...inferior.phtml


Make sure you at least read the last link to " Spikes are Not Inferior,or Are They"