Does aquatic invasive species removal benefit native fish? The response of gizzard shad (Dorosoma cepedianum) to commercial harvest of bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix)

Seth A. Love, Nathan J. Lederman, Rebekah L. Anderson, Jason A. DeBoer, Andrew F. Casper

Research output: Contribution to journalArticle

Abstract

Bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix), collectively known as Asian carp, are planktivorous fishes that have invaded aquatic ecosystems throughout the Mississippi River Basin of North America. Consequently, Asian carp management plans (including contractual harvest) have been implemented to prevent range expansion into vulnerable systems such as the Great Lakes. Asian carp harvest also provides an opportunity to assess if control efforts can benefit native fishes. To answer this question, 26 years of standardized electrofishing data were analyzed, focusing on gizzard shad (Dorosoma cepedianum) body condition (Wr) and abundance (catch-per-unit-effort, CPUE) from the Illinois River (Illinois, USA). Gizzard shad data were categorized into pre-Asian carp establishment (1990–1999), after Asian carp establishment (2000–2009), and harvest (2010–2014) periods. Gizzard shad Wr and small gizzard shad CPUE decreased in the entire river after Asian carp invasion, and Wr and large gizzard shad CPUE rebounded where harvest occurred. Contrastingly, small gizzard CPUE has not yet exhibited a positive response to harvest. These mixed results indicate a time-lag may exist between management action and ecosystem response. Ultimately, Asian carp removal may be facilitating improvements in gizzard shad body condition (by increasing forage availability), which may portend a future gizzard shad population rebound.

Original languageEnglish (US)
Pages (from-to)403-412
Number of pages10
JournalHydrobiologia
Volume817
Issue number1
DOIs
StatePublished - Jul 1 2018

Fingerprint

Dorosoma cepedianum
Hypophthalmichthys nobilis
Hypophthalmichthys molitrix
invasive species
catch per unit effort
carp
silver
fish
body condition
electrofishing
ecosystem response
range expansion
river
aquatic ecosystem
Illinois River
forage
river basin
harvest
removal
Mississippi River

Keywords

  • Asian carp
  • Bigheaded carp contractual commercial harvest
  • Invasive species management
  • Planktivore

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Does aquatic invasive species removal benefit native fish? The response of gizzard shad (Dorosoma cepedianum) to commercial harvest of bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix). / Love, Seth A.; Lederman, Nathan J.; Anderson, Rebekah L.; DeBoer, Jason A.; Casper, Andrew F.

In: Hydrobiologia, Vol. 817, No. 1, 01.07.2018, p. 403-412.

Research output: Contribution to journalArticle

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