Hello All, For a change of pace on this listserv from the self-flagellation of ecologists, I like to ask if anyone knows of an equation that uses carapace length of the crayfish Orconectes virilis to predict biomass. I am removing these exotic crayfish from a developed spring to prepare for the introduction of Gila topminnow and desert pupfish. I plan on trapping through the fall and introducing the fish either this upcoming spring or next fall. No, I don't expect to get all of them, but I'd like to reduce their population so these fish don't get eaten right away. I'm taking sex/carapace length info on about 10% of individuals. I'd like to estimate the amount of biomass I am removing in crayfish from this system. And yes, we are eating the ones that are big enough.
Thank you, Shannon Torrence, PhD Wildlife Biologist Tonto Basin Ranger District, Tonto NF 28079 N. AZ Hwy 188 Roosevelt, AZ 85545 928-467-3218 office 928-467-3239 fax storre...@fs.fed.us
