Sean Hartzell publishes research on invasive crayfish

Sean Hartzell
Sean Hartzell, adjunct professor in the Department of Biological and Allied Health Science, has recently published a paper in the journal Northeastern Naturalist (27(2):307–317). The paper, entitled "Life History of an Invasive Population of Allegheny Crayfish (Faxonius obscurus) in an Eastern Pennsylvania Stream," is a continuation of Professor Hartzell's longstanding interest in crayfish, important organisms in aquatic ecosystems in North America. Professor Hartzell studied life history characteristics of this invasive species such as size classes, size at sexual maturity, sex ratios, molting frequency and seasonal changes in a population located in a small tributary of Fishing Creek. While many of these characteristics were similar to those reported for this species in its native range, Professor Hartzell found that the number of offspring produced was greater than in West Virginia populations. The number of offspring produced was predicted by female body length.Professor Hartzell earned his BS and MS in Biology at Bloomsburg University.

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