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Assessment of a New Gear to Sample Walleye Eggs
Author(s) -
Katt Jordan D.,
Koupal Keith D.,
Schoenebeck Casey W.,
Hoback W. Wyatt
Publication year - 2012
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1080/02755947.2012.655842
Subject(s) - cobble , sampling (signal processing) , fishery , fish <actinopterygii> , deposition (geology) , substrate (aquarium) , biology , environmental science , ecology , computer science , habitat , paleontology , filter (signal processing) , sediment , computer vision
A new gear for sampling walleye Sander vitreus eggs, egg sampling disks, is described, and the ability of these disks to estimate walleye egg density on mud, cobble, and rip‐rap substrates is demonstrated. Each egg sampling disk was a concave steel disk covered with outdoor carpet. The ability of the disks to estimate walleye egg density and total egg deposition on a defined area was tested at Sherman Reservoir, Nebraska. The average cost of each egg sampling disk was US$8.00. An array of 10 disks could be processed (retrieved, complete the egg recovery procedure, and redeployed) in approximately 1 h. The egg sampling disks were an appropriate gear for estimating egg deposition on mud, cobble, and rip‐rap substrate and could also be useful for estimating the total egg deposition of walleyes and other demersally spawning fish. Received December 21, 2010; accepted August 30, 2011