Diet overlap and predation between largemouth bass and walleye in Wisconsin lakes using DNA barcoding to improve taxonomic resolution

North American Journal of Fisheries Management
By: , and 

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Abstract

Over the last decade, the abundance of Largemouth Bass Micropterus salmoides has increased in many northern Wisconsin lakes, causing concern among anglers and biologists regarding the potential for Largemouth Bass to negatively affect populations of Walleye Sander vitreus through predation or competition for prey. Our objectives were to determine whether (1) diet overlap and predation occurred between adult Walleyes and Largemouth Bass in four northern Wisconsin lakes and (2) the use of DNA barcoding to reduce unidentifiable fish in diet samples affected conclusions regarding diet overlap. A single occurrence of Walleye predation was observed in the diets of 945 Largemouth Bass. Moderate to high diet overlap was observed between Largemouth Bass and Walleyes throughout much of the study period. The use of DNA barcoding reduced the amount of unidentified fish in diets to <1% and showed that failure to identify fish or fish parts can affect conclusions regarding diet overlap. Largemouth Bass predation is probably not a primary factor affecting Walleye abundance in the lakes we selected, but observed diet overlap suggests the potential for competition between the two species.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Diet overlap and predation between largemouth bass and walleye in Wisconsin lakes using DNA barcoding to improve taxonomic resolution
Series title North American Journal of Fisheries Management
DOI 10.1080/02755947.2016.1146179
Volume 36
Issue 3
Year Published 2016
Language English
Publisher Taylor & Francis
Contributing office(s) Coop Res Unit Leetown
Description 9 p.
First page 621
Last page 629
Country United States
State Wisconsin
Other Geospatial Big Arbor Vitae lake, Big Sissabagama lake, Little John lake. Teal lake
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