Title page for ETD etd-11172012-040206


Type of Document Master's Thesis
Author Hershfeld, Donald Christopher
URN etd-11172012-040206
Title Assessing potential navigation impacts to the Kanawha river ecosystem :a modeling approach
Degree Master of Science
Department Fisheries and Wildlife Sciences
Advisory Committee
Advisor Name Title
Orth, Donald J. Committee Chair
Ney, John J. Committee Member
Nielsen, Larry A. Committee Member
Webster, Jackson R. Committee Member
Keywords
  • Fisheries navigation
Date of Defense 1987-12-05
Availability restricted
Abstract

An extensive study of the biota of the Kanawha River was integrated to examine the trophic basis of fish production and predict potential impacts of increased tow traffic at two sites in the Winfield Pool. Total standing stock and production of adult fish were estimated as 242 kg/ha and 188 kg/ha/yr, respectively. Sixty—one species were categorized into six trophic groups. Trophic generalists (omnivores and herbivore/detritivores) consumed a variety of foods including considerable detritus. These groups accounted for 73 to 83% of total ichthyomass and 81% of total adult production. Total fish consumption at the more riverine upper site was partitioned into 35% l detritus, 28% invertebrates, 20% plant matter, 12% other fish, and 5% crayfish. At the lower, more lentic site the diet consisted of 34% detritus, 25% plant matter, 21% other fish, 17% invertebrates, and 3% crayfish. The overall basis of production relies upon imports of allochthonous materials.

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