Gape limitation and piscine prey size‐selection by yellow perch in the extreme southern area of Lake Michigan, with emphasis on two exotic prey items

$48.00 plus tax (Refund Policy)

Download / Buy Article:


The trophic linkage between yellow perch Perca flavescens and two exotic prey items, alewife Alosa pseudoharengus and round goby Neogobius melanostomus, was investigated in the extreme southern area of Lake Michigan during the summer of 2002. Yellow perch ≥100 mm total length, LT(n = 1293) exhibited size selective feeding, with 148 fish containing round gobies and 120 fish containing alewives. The mean round goby LT, preyed on by yellow perch, was 23% of the predator LT, with a range of 7 to 47%, and mean alewife LT was 32% of yellow perch LT, with a range of 18 to 46%. Although the selection of prey size by yellow perch increased proportionally with yellow perch LT, prey consumed appeared smaller than theoretically possible based on gape size.

Keywords: Lake Michigan; prey; size selectivity; yellow perch

Document Type: Regular Paper


Affiliations: Aquatic Biology and Fisheries Center, Department of Biology, Ball State University, Muncie, IN 47306, U.S.A.

Publication date: January 1, 2005

Related content



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more