EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
6/07/2017 | 9:15 AM - 9:30 AM | HABITAT-MEDIATED MORPHOLOGICAL VARIATION IN INTRODUCED CRAYFISH POPULATIONS | 305A
HABITAT-MEDIATED MORPHOLOGICAL VARIATION IN INTRODUCED CRAYFISH POPULATIONS
Evidence indicates that crayfish morphology can vary depending on environmental context. Introduced species may show more inter-population variation in morphology than native species, since morphological variation is considered a trait conducive to successful invasion. This higher level of trait variability can lead to highly localized populations. Orconectes virilis, an invasive crayfish in North American ecosystems, may display this elevated level of variation, making it a good model organism for testing this concept. Specimens were collected from lake and river habitats in the Cahaba River drainage of Alabama in the United States and multiple river drainages in the prairie provinces of Canada. Both traditional morphometric measurement and geometric morphometics were used to compare morphologies between “lake” and “river” populations. Comparing the length-to-width ratios of the areola between the groups, we found that lake dwelling crayfish tended to have a higher areola ratio than river dwellers. This suggests that the introduced populations are changing their morphology in response to their novel environment. Identifying these traits in known invasives may help predict which species have the potential to become invasive in the future.
- C26 Invasive Species
- C03 Invertebrates
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
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Presenters/Authors
Jennifer Weber
(), Auburn University, jmw0030@auburn.edu;
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Bronwyn Williams
(), North Carolina Museum of Natural Sciences, bronwyn.williams@naturalsciences.org;
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Brian Helms
(), Troy University, helmsb@troy.edu;
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