Sampling the central channel provides additional information on fish assemblages in a large boatable river in the U.S. Midwest

Yong Cao, Jerrod Parker, Tim Edison, John Epifanio

Research output: Contribution to journalArticle

Abstract

It is a challenge to adequately characterize the fish assemblages of large rivers because of their sizes and high spatial–temporal habitat heterogeneity. Multiple sampling methods are often needed, but their uses increase cost and present difficulty for data standardization. In this study, we examined how much new information central-channel electrofishing sampling could add to typical shoreline electrofishing in a large and relatively shallow river, the lower Wabash River, in the U.S. Midwest. We found that the two types of samples differed markedly in species composition, and each was strongly associated with a subset of species. Shoreline samples captured more fish individuals and species, and reached higher functional diversity, but central-channel samples often captured several large benthivore and migratory species such as Redhorse and Shovelnose Sturgeon. Central-channel electrofishing appears to be a quick and low-cost method to supplement shoreline sampling in monitoring and assessing large shallow rivers.

Original languageEnglish (US)
Pages (from-to)432-441
Number of pages10
JournalJournal of Fish and Wildlife Management
Volume10
Issue number2
DOIs
StatePublished - Jan 1 2019

Keywords

  • Fish survey
  • Freshwater biodiversity
  • Indicator-species analysis
  • Large-river habitat
  • Prairie rivers

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Animal Science and Zoology
  • Nature and Landscape Conservation

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