Chestnut Lamprey - Report - Abstract

Abstract

The following is a management plan description for the Chestnut Lamprey (Ichthyomyzon castaneus). This lamprey is one of the North American native parasitic species of lamprey, and can be found in rivers along the eastern United States and Canada. During their early years the larval lampreys settle in the bottom of slow flowing water and filter feed on desmids, diatoms, and protozoans. As adults, these animals attach and feed off a host, such as trout. Recent research gives reason to believe that species including the Chestnut lamprey (I. castaneus) remain attached to their host during the winter. As with many lampreys the Chestnut Lamprey (I. castaneus) breeds only once during it’s lifetime, producing thousands of eggs (Lanteigne, 17). Many attempts have been made to control the spread of the lamprey. Keeping track of these parasite numbers requires traps or aid from local fishermen. In some areas of Canada numbers of many lamprey species are measured by observing the scars on caught fish. In some areas the Chestnut Lamprey (I. castaneus) is considered an invasive species and steps are being taken to control their numbers. Since lamprey numbers can spread quickly careful management is required. One possible way to manage these parasites in the future is egg collection where lamprey activity is high. Any diseases that can be transmitted through feeding must be monitored in order to prevent dwindling fish numbers and human health problems. The Chestnut Lamprey (I. castaneus) must be monitored, while ensuring their numbers do not drop too low.