2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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6/08/2017  |   3:30 PM - 3:45 PM   |  ARE ALL RIVERS CREATED EQUAL? DETERMINING HOW FOOD WEB DYNAMICS AFFECT FISH NURSERY HABITAT   |  306B

ARE ALL RIVERS CREATED EQUAL? DETERMINING HOW FOOD WEB DYNAMICS AFFECT FISH NURSERY HABITAT

Estuarine fish nursery areas are managed based on habitat types and water quality. The structure and quality of the planktonic food web may be key to the survival and recruitment of fish. We investigated how differences in lower trophic level food web affected river herring strategic habitat area in Chowan River, N.C. Our objective was to determine how seston and zooplankton fatty acid composition, and zooplankton species composition, would affect larval fish fatty acid composition. The presence of particular fatty acids is linked to larval fish survival. We found differences in the seston and zooplankton fatty acid composition over space and time in Chowan River and three of its tributaries. The zooplankton species composition changed from copepod and cladoceran community to cladoceran community in the tributaries, with higher percentage of copepods in the main stem of Chowan River. The mesozooplankton were higher in EPA and DHA in the main stem, and tributaries had higher levels of EPA and ALA. Differences seen in the seston and zooplankton fatty acid composition can change the growth and fatty acid percent composition of larval river herring.

  • C32 Primary and Secondary Production
  • C11 Community Ecology
  • C25 Food Webs

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Presenters/Authors

Deborah Lichti (), East Carolina University, lichtid12@students.ecu.edu;


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Jacques Rinchard (), The College of Brockport, State University of New York, jrinchar@brockport.edu;


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David Kimmel (), NOAA Alaska Fisheries Science Center, david.kimmel@noaa.gov;


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