EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/20/2019 | 9:15 AM - 9:30 AM | OPTIMIZING INVASIVE CRAYFISH TRAPPING METHODS, CASE STUDY OF PROCAMBARUS CLARKII | 251 DE
OPTIMIZING INVASIVE CRAYFISH TRAPPING METHODS, CASE STUDY OF PROCAMBARUS CLARKII
Recent crayfish invasions have exposed the lack of proven methods for eradicating populations and preventing spread. We have identified an isolated population of the invasive red swamp crayfish (Procambarus clarkii) in the Chicago River (Illinois, USA) that could spread into Lake Michigan and other Laurentian Great Lakes. The only available method for controlling crayfish populations in lotic ecosystems is intensive trapping, but this is expensive and little is known about how to optimize efforts. We report on experiments to determine the approach that yields highest catch per unit effort (CPUE; number of crayfish captured per trap cleared). First, we determined the optimal number of nights to leave traps in the water. Traps emptied after one night gave a CPUE of 0.71, and this increased for traps left for two (1.11) and three (1.61) nights. Next, we examined CPUE for five different baits (P. clarkii, herring, dog food, hot dog, beef liver). Hot dogs gave a CPUE significantly higher than other baits (Tukeys, p = <0.01). These results show that simple changes to trapping programs can increase CPUE and hopefully lead to more effective control of invasive crayfishes.
- Invertebrate
- Management
- Population
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Presenters/Authors
Colette Copic
(), Loyola University Chicago, ccopic@luc.edu;
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Rachel Egly
(), Loyola University Chicago, regly@luc.edu;
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Erin O'Shaughnessey
(), Loyola University Chicago, eoshaughnessey@luc.edu;
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Reuben Keller
(), Loyola University Chicago, rkeller1@luc.edu;
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