NANFA--Native Fishes and Exotic Mollusks

Hoover, Jan J ERDC-EL-MS (
Tue, 8 Apr 2003 13:57:37 -0500

The Oct 2002 issue of Freshwater Biology contains this interesting article:

"Predation on exotic zebra mussels by native fishes: effects on predator and
prey," by Daniel D.Magoulick and Lindsey C. Lewis, University of Arkansas.

Article describes field studies showing: 1) that zebra mussels were primary
prey for 48.2% of freshwater drum, 52.9% of blue catfish, and 100% of redear
sunfish; 2) fish significantly reduced densities of large (> 5 mm) zebra
mussels. Authors describe seasonal shifts in diets of fishes, and
differences among species in processing mussels. They conclude that while
fish could suppress zebra mussel colonization, they were "ultimately
unlikely to limit population density because of zebra mussel reproductivce
potential. "
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