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Selective impact of filter‐feeding gizzard shad on zooplankton community structure 1
Author(s) -
Drenner Ray W.,
de Noyelles Frank,
Kettle Dean
Publication year - 1982
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1982.27.5.0965
Subject(s) - gizzard shad , copepod , zooplankton , predation , biology , dorosoma , piscivore , seiche , gizzard , fishery , ecology , predator , forage fish , crustacean , fish <actinopterygii> , oceanography , geology
Comparison of ponds containing gizzard shad with control ponds without fish showed that gizzard shad predation suppressed populations of Keratella sp., Diaphanosoma brachyurum, copepod nauplii, Chaoborus sp., and cyclopoid copepodids and adults, but enhanced populations of Diaptomus pallidus copepodids and adults. These results confirm previous laboratory studies which showed that filter‐feeding gizzard shad are not size‐selective predators, as is typically assumed of planktivorous fish, but instead feed on those animals which have little ability to escape, so that their predation results in a community shift toward the more evasive prey.