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Filter‐Feeding Rates of Gizzard Shad
Author(s) -
Drenner Ray W.,
Mummert John R.,
OˈBrien W. John
Publication year - 1982
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1982)111<210:frogs>2.0.co;2
Subject(s) - dorosoma , gizzard shad , zooplankton , biology , lepomis , filter (signal processing) , fishery , gizzard , volume (thermodynamics) , zoology , environmental science , fish <actinopterygii> , physics , computer science , computer vision , quantum mechanics
In laboratory feeding trials, gizzard shad Dorosoma cepedianum of 5.3–17.5‐cm standard length fed on zooplankton as pump filter feeders, collecting prey by a series of rapid suctions not directed at individual prey. Buccal volume, determined from plaster casts, increases as a power function of fish standard length. Pumping rates decrease exponentially with length. A model of filtering rate, the product of buccal volume and pumping rate, was corroborated by feeding trials in which gizzard shad cleared zooplankton from a pool. By this model, absolute filtering rates increase as a power function of fish length while filtering rate per gram of fish decreases as a power function of length. Populations of gizzard shad can filter substantial volumes of lake water each hour.