NEW THIS YEAR! The schedule of technical sessions is in Sched.org which allows you to search within the schedule, filter the schedule to show sessions only occurring on a certain date, within a track, or in a room. You can also build your own schedule by creating a free account in Sched.org. Click here to return to the main Midwest Fish & Wildlife Conference website.
PLEASE NOTE: The schedule posted here is as of 1/25/16, and is subject to change. Please check back for updates.
AUTHORS:L. Zoe Almeida*, Samuel C. Guffey, Marisol S. Sepúlveda, Tomas O. Höök – Purdue University
ABSTRACT: In some systems, including central Lake Erie, yellow perch Perca flavescens have demonstrated specialized foraging behavior in the presence of hypolimnetic hypoxia, during which they dive into the hypoxic zone to forage on benthic prey. We investigated whether this behavior is an inherent response of yellow perch to hypoxia by conducting three laboratory experiments on two strains of yellow perch. The first experiment investigated whether yellow perch were willing to leave a normoxic environment to feed in hypoxic waters. The second assessed the effects of acute hypoxia exposure on yellow perch hemoglobin concentration and expression of genes that mediate the physiological response to hypoxia (e.g., hif-1α). The third investigated the effects of chronic hypoxia exposure on yellow perch consumption, growth, hemoglobin concentrations, and gene expression. Results demonstrate that, although there are differences between strains in foraging behavior, hemoglobin concentration, and the expression of some genes, these differences appear unrelated to hypoxia exposure. Yellow perch may be generally tolerant to hypoxic conditions, potentially providing them with a competitive advantage in utilizing resources within and outside of hypoxic zones.
Wednesday January 27, 2016 10:20am - 10:40am EST
Atrium
