One reason GSH tend to disappear from LMB ponds is older GSH develop an ovarian parasite (protozoan) that limits reproduction esp in older GSH. Many, most, or all young GSH become forage items leaving behind mostly the largest old adult GSH that tend to be infertile or of low reproductive potential. Thus the downward spiral trend of the GSH population unless quite a few YOY GSH survive each year.
Last edited by Bill Cody; 08/20/11 12:54 PM.
