Event Title
Does Position Along the Watershed Affect Hybridization Dynamics Between the Native Orconectes Sanbornii and Invasive O. rusticus?
Location
King Building 343
Document Type
Presentation
Start Date
4-28-2017 4:30 PM
End Date
4-28-2017 5:50 PM
Abstract
The rusty crayfish (Orconectes rusticus), has been recorded to have expanded outside of its endemic range of Southwest Ohio and Kentucky, displacing a variety of native crayfish. O. rusticus range expansion is likely due to human use as live bate, resulting in its introduction to the native range of the Sanborn’s crayfish (O. sanbornii). We are investigating the morphological and genetic impacts of invasion and possible hybridization in two invaded watersheds in north-central Ohio. Crayfish were collected from multiple sites along the Kokosing River and the Huron River. In both rivers, the ratio of invasive to native individuals varies with position in the watershed with a higher proportion of invaders downstream than upstream. Here, we ask whether the genetic composition of populations sampled along the watershed agrees with the morphological pattern, using nuclear sequence data. Further, hybridization has been confirmed in the Huron R. but not yet in the Kokosing R. A closer look at the distribution of genetic diversity along the length of the watershed may provide insight into the consequences of the invasion for both invader and native.
Keywords:
invasion, population genetics, hybridization
Recommended Citation
Casado Henderson, Elisa, "Does Position Along the Watershed Affect Hybridization Dynamics Between the Native Orconectes Sanbornii and Invasive O. rusticus?" (04/28/17). Senior Symposium. 10.
https://digitalcommons.oberlin.edu/seniorsymp/2017/presentations/10
Major
Biology
Advisor(s)
Keith Tarvin, Biology
Project Mentor(s)
Angela Roles, Biology
April 2017
Does Position Along the Watershed Affect Hybridization Dynamics Between the Native Orconectes Sanbornii and Invasive O. rusticus?
King Building 343
The rusty crayfish (Orconectes rusticus), has been recorded to have expanded outside of its endemic range of Southwest Ohio and Kentucky, displacing a variety of native crayfish. O. rusticus range expansion is likely due to human use as live bate, resulting in its introduction to the native range of the Sanborn’s crayfish (O. sanbornii). We are investigating the morphological and genetic impacts of invasion and possible hybridization in two invaded watersheds in north-central Ohio. Crayfish were collected from multiple sites along the Kokosing River and the Huron River. In both rivers, the ratio of invasive to native individuals varies with position in the watershed with a higher proportion of invaders downstream than upstream. Here, we ask whether the genetic composition of populations sampled along the watershed agrees with the morphological pattern, using nuclear sequence data. Further, hybridization has been confirmed in the Huron R. but not yet in the Kokosing R. A closer look at the distribution of genetic diversity along the length of the watershed may provide insight into the consequences of the invasion for both invader and native.
Notes
Session III, Panel 20 - Water | Health
Moderator: Marcelo Vinces, Director, Center for Learning, Education, and Research (CLEAR) in the Sciences; Associate Director, Center for Teaching Innovation and Excellence (CTIE)