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Biological Control Of Crab Predation On Hard Clams Mercenaria mercenaria (Linnaeus, 1758) By The Toadfish Opsanus tau (Linnaeus) In Tray Cultures
Bisker, Robert Castagna, Michael
Bisker, Robert
Castagna, Michael
Abstract
Oyster toadfish Opsanus tau (Linne) were tested as biological controls of crab predation on juvenile hard clams Mercenaria mercenaria (Linne) in trays with crushed stone aggregate. Clam survival after 34 weeks was 69.5% in the presence of toadfish and 2.3% in trays without toadfish. Toadfish reduced the total number of crabs (mud crabs and blue crabs). Crabs in trays with toadfish present had smaller carapace widths.
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1989
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1526_bisker1989.pdf
Adobe PDF, 350.46 KB
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ESL Publications, predation, toadfish, Opsanus, crabs, hard clams, Mercenaria, tray culture
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Virginia Institute of Marine Science
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