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CONFERENCE SCHEDULE UPDATES & CHANGES: As a result of the prolonged government shutdown, we experienced a number of cancellations and changes to the schedule. Cancellations and changes are listed here (as of January 26, 2019). 

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Other - Landscape Ecology [clear filter]
Tuesday, January 29
 

6:00pm EST

(P77) Navigation Dams and Larval Fish Dynamics
AUTHORS. Gregory D. King, University of Illinois; Ana M Chará-Serna, Illinois Natural History Survey; Robert E. Colombo, Eastern Illinois University; David H. Wahl, Illinois Natural History Survey

ABSTRACT. Navigation dams, such as those on the Illinois and Mississippi Rivers, reduce hydrologic connectivity and alter flow regimes in river systems. Effects on fish community dynamics include interfering with reproductive cues and altering zooplankton community dynamics, an essential food source for larval fishes. However, there is a lack of research on navigation dams, and their effects on fish communities are not clearly understood. Studies simultaneously examining fish spawning and zooplankton communities are critical because phenological changes in either fish or zooplankton have the potential to cause a mismatch between spawning and larval food availability. On the other hand, increased water residence time within dammed rivers may lead to increased zooplankton and be beneficial to larval fishes. To determine if navigation dams have altered the spawning cues of fishes, we compared spawning synchrony between the Illinois (dammed) and Wabash (undammed) Rivers by comparing larval community composition and using occupancy models to determine peak spawning times for individual fish families. These data were then compared to the zooplankton community to determine how spawning time corresponds to food availability. We collected larval fish and zooplankton throughout the spawning season in the Illinois and Wabash Rivers from 2015 – 2018. Larval fish densities peaked in June in both rivers every year, typically around the timing of peak zooplankton abundance. Cyprinids were the most abundant family in the Wabash River, while Clupidae were the most abundant in the Illinois River. Our research will improve our understanding of ecosystem dynamics within these large rivers, and the effects that navigation dams have on them.

Tuesday January 29, 2019 6:00pm - 9:00pm EST
SUPERIOR BALLROOM C/D
 


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  • Main Agenda Item
  • PLENARY SESSION
  • Poster
  • S01: Using Standardized Assessments to Evaluate Harvest Regulations: Advancing Science-Based Fisheries Management
  • S02: Eastern Massasauga Conservation - Management - Recovery
  • S03: Application of environmental DNA-based tools for aquatic invasive species monitoring and management
  • S04: Great Lakes Trophic Structure: Innovations and ongoing studies of predatory fishes
  • S05: Migratory wildlife collisions with manmade structures: monitoring - prevention - patterns from collision data
  • S06: Considering New Paradigms in the Management of Beaver - Trout - Riparian Habitats
  • S07: Use of Acoustic Telemetry to Inform Fisheries Management Across Midwestern US and Canada
  • S08: Science in service to wetlands conservation and wildlife management in the lower Great Lakes region: history - status - state of the art
  • S09: Carbon Dioxide As An Aquatic Resource Management Tool
  • S10: The Ohio Biodiversity Conservation Partnership: An Innovative University-State Agency Partnership for Conservation in Ohio
  • S11: Dreissenid Mussels: Advancements in control - detection - management - biology
  • S12: Reading the aquatic landscape and connecting restoration design
  • S13: Sea Grant role in communicating needs to inform research and conservation
  • S14: Bridging the Gap between Fish and Wildlife: Discussions on Multi-Species Interactions and Ecosystem Stability
  • S15: Collaborating with community members: the human side of fish and wildlife management and research
  • S16: Agriculture and Wildlife Coexistence in the Midwest United States
  • Student Event
  • T01: Fisheries: Great Lakes I
  • T02: Wildlife: Urban-Wildlife Conflict
  • T03: Fisheries: Behavior & Physiology
  • T04: Wildlife: Wetland Conservation
  • T05: Lightning Talk Session: Fisheries
  • T06: Human Dimensions: Fisheries I
  • T07: Fisheries: Rivers & Streams
  • T08: Wildlife: Waterfowl
  • T09: Human Dimensions: Wildlife
  • T10: Fisheries: Invasive Species I
  • T11: Fisheries: Fish Conservation
  • T12: Wildlife: Cervids
  • T13: Fisheries: Habitat
  • T14: Fisheries: Great Lakes II
  • T15: Fisheries: Lakes & Reservoirs
  • T16: Fisheries: Invertebrates
  • T17: Wildlife: Mammals
  • T18: Human Dimensions: Policy & Engagement
  • T19: Fisheries: Early Life History
  • T20: Wildlife: Upland I
  • T21: Fisheries: Invasive Species II
  • T22: Wildlife: Turtles
  • T23: Fisheries: Big Rivers
  • T24: Wildlife: Upland II
  • T25: Fisheries: Techniques
  • T26: Fisheries: Invasive Species III
  • T27: Wildlife: Avian
  • T28: Lightning Talk Session: Wildlife
  • T29: Human Dimensions: Fisheries II
  • Workshop