Predatory impact of the mosquitofish (Gambusia holbrooki Girard) on zooplanktonic populations in a pond at Tenuta di Castelporziano (Rome, Central Italy)

DOI https://doi.org/10.4081/jlimnol.2001.1.189

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Published: Aug 1, 2001
Original Articles

Associate Editor
Issue
Vol 60 No 2 (2001)
Pages
189-193
Keywords
zooplankton, fish predation, Gambusia holbrooki, pond
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How to Cite
MARGARITORA, F., FERRARA, O., & VAGAGGINI, D. (2001). Predatory impact of the mosquitofish (Gambusia holbrooki Girard) on zooplanktonic populations in a pond at Tenuta di Castelporziano (Rome, Central Italy). Journal of Limnology, 60(2), 189-193. https://doi.org/10.4081/jlimnol.2001.1.189
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Fiorenza G. MARGARITORA *
Affiliation not present.
Ornella FERRARA
Affiliation not present.
Daria VAGAGGINI
Affiliation not present.
(*) Corresponding Author:
Fiorenza G. MARGARITORA | fiorenza.margaritora@uniroma1.it

Abstract

A study of a permanent pond located in a nature reserve in Central Italy was carried out over two periods (1985-87; 1995-98) to determine the structure and dynamics of planktonic biocoenosis. The composition of the zooplankton community was quite different in the two periods of study: in the first period, rotifers, small-bodied cladocerans and larval copepods were the dominant groups; in the second there was a shift from rotifers and microcrustaceans to dominance by large-bodied Daphnidae and adult copepods. The possibility is stressed that Gambusia holbrooki, present in 1985 and absent in 1995, may be responsible for the changes in the planktonic community.

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