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Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in...

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Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan

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Title	Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan
Alternative Title	Technical papers of the U.S. Fish and Wildlife Service, 98
Contact	mailto:library@fws.gov
Creator	Wells, LaRue
Description	Stomachs of 1,064 alewives, 1,103 yellow perch, 246 spottail shiners, 288 trout-perch, 454 slimy sculpins, and 562 fourhorn sculpins from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and nearly all were caught at the bottom in the southeastern part of the lake near Saugatuck, Michigan. Pontoporeia was the most commonly reprented food item in the stomach contents of the fish examined, with immature midges, Mysis (a type of freshwater shrimp), copepods, cladocerans, fingernail clams and crayfish also being represented. Different species consumed different proportions of foods. Zooplankton was the principle food of alewives and spottail shiners, but was also consumed in small quantities by yellow perch and trout perch. Mysis was important to fourhorn sculpins, in addition to Pontoporeia. Immature midges were a major portion of spottail shiners and trout perch, also being consumed by alewives. Fish were often the most important food of yellow perch in the largest size category. Crayfish were a sizable portion of the diet of yellow perch on rocky bottoms, but sparingly on smooth bottoms. Spottail shiners also ate substantial numbers of fingernail clams.
Subject	Document Fisheries management Fishes Lakes Rivers and streams Biologists (USFWS) Biological control
Publisher	U.S. Fish and Wildlife Service
Date of Original	1980
Type	Text
Format	PDF
Item ID	98_Wells.pdf
Source	NCTC Conservation Library
Language	English;
Rights	Public domain;
File Size	1251813 Bytes
Original Format	Document
Length	12 p.
Full Resolution File Size	1251813 Bytes
Images Source File Name	98_Wells.pdf
Date created	2014-06-05
Date modified	2014-06-05

Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan

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