Northeastern Section - 44th Annual Meeting (22–24 March 2009)
Paper No. 55-8
Presentation Time: 8:00 AM-12:00 PM


MARQUIS, Adam, University of Southern Maine, Portland, ME 04104,, WILSON, Karen, Department of Environmental Science, Univ. of Southern Maine, Portland, ME 04104, and GALLAGHER, Merry, Maine Dept. of Inland Fisheries and Wildlife, Bangor, ME 04401

Invasive crayfish are an increasing problem in North America, and can threaten freshwater resources through consumption of aquatic insects, snails, plants and fish eggs, or by displacing native crayfish species. Based on past research, Maine's low crayfish diversity along with little habitat overlap could lead to vulnerability with non-native invasions. Detecting crayfish invasions is difficult unless there is reasonable knowledge on native distributions. This project's goals are to identify and update distributions of native and non-native crayfish in Maine and identify crayfish “hot spots” that may indicate an invasion. Crayfish samples were collected as part of the Department of Inland Fisheries and Wildlife's brook trout stream surveys in 2007 and 2008 and by University of Southern Maine in western Maine in summer of 2008. In some cases we revisited sites sampled previously by other researchers to confirm the presence of invasive crayfish. The presence of crayfish was assessed in 1061 stream sites (MeDIFW) and 13 other locations checked by USM. We found O. virilis a native species to be most common at 94% of the total catch, followed by O. limosus (5.0%) and O immunis (1.0 %). Non-native crayfish are suspected in select locations throughout the State by human introductions including bait buckets and harvesting attempts. This is an ongoing effort that depends in part on tips from lake shore owners, anglers, and other outdoor enthusiasts.

Northeastern Section - 44th Annual Meeting (22–24 March 2009)
General Information for this Meeting
Session No. 55--Booth# 43
Chemical, Biological, Hydrological, and Geochemical Aspects of Surface and Ground Waters, and Their Policy and Economic Implications (Posters): Maine Water Conference Session
Holiday Inn By the Bay: Casco Bay Hall
8:00 AM-12:00 PM, Tuesday, 24 March 2009

Geological Society of America Abstracts with Programs, Vol. 41, No. 3, p. 111

© Copyright 2009 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.