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Title: Preliminary results on predation of gypsy moth egg masses in Slovakia
Author: Turcani, Marek; Liebhold, Andrew; McManus, Michael; Novotny, Julius
Publication: In: McManus, Michael L.; Liebhold, Andrew M., eds. Proceedings: Ecology, Survey and Management of Forest Insects; 2002 September 1-5; Krakow, Poland. Gen. Tech. Rep. NE-311. Newtown Square, PA: U.S. Dept. of Agriculture, Forest Service, Northeastern Research Station. 115-120.
Abstract: Predation of gypsy moth egg masses was studied in Slovakia from 1999-2002. Predation on naturally laid egg masses was recorded and linear regression was used to test the hypothesis that predation follows a type II vs. type III functional response. We also investigated the role of egg mass predation in gypsy moth population dynamics. The relative contribution of invertebrates vs. vertebrates as agents of predation on egg masses was estimated using exclosures. During the study, population densities remained very low and stable. Generally, invertebrata caused 38% and vertebrata 62% of total predation. K-values varied from 0.03 to 0.70 and plots of abundance vs. k-values suggested that total predation is inversely density dependent, characteristic of a "type II" functional response. The ultimate role of predation on gypsy moth egg masses remains unclear, however there are some indications that egg mass predation plays a significant role in the dynamics of gypsy moth populations in Slovakia.
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