The Distribution of the Freshwater Mussels, Anodonta spp. and Margaritifera falcata in Alaska Purpose Freshwater mussels inhabit watersheds throughout Alaska, yet they are often overlooked. Available literature and specimen data indicate that as many as four species of freshwater mussels may inhabit Alaskan rivers and lakes, but little is known about native mussel species distribution, and virtually nothing is known about non-native mollusk occurrence or distribution. Freshwater mussels are good indicators of environmental conditions because they are long lived, they bio-concentrate contaminants, and they are sensitive to changes in environmental conditions. Most freshwater mussel larvae are obligate parasites of specific host fish, so their existence is closely tied to certain fish populations. Study Methods This study will rely heavily on the participation of professionals who will be conducting field research in the target areas during the 2004 summer season. Participants are encouraged to send voucher specimens to the project for identification. New data garnered through this project should help clarify species distributions of mussels in the target areas. When combined with data already available, a more complete picture of statewide species distribution can be accomplished. When possible, we will approach potential participants with a presentation that will describe Alaskan freshwater mussel species, their habitats, and the techniques for collecting samples. For others this document and additional web postings will provide the same basic information. Participants will be asked to: Collect shells from live or deceased specimens. Fill out a very brief data sheet describing collection location and habitat. Mail samples in postage paid mailing tubes. To find out more about the project and how to participate, read the Alaska Freshwater Mussel Project PDF (1.8 MB). Our progress to date (August 2004) is available at Mussel Progress Report PDF (50 KB).