Živorní cyklus a potrava Polycentropus flavomaculatus (Pictet, 1834) (Trichoptera, Polycentropidae)

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Title in English Life cycle and food of Polycentropus flavomaculatus (Pictet, 1834) (Trichoptera, Polycentropidae)
Authors

TAJMROVÁ Lenka HELEŠIC Jan

Year of publication 2006
Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description Life history patterns and feeding of Polycentropus flavomaculatus (Trichoptera) larvae were studied from May 2004 to March 2005. The larvae were collected monthly from a riffle stretch of the Loučka River (Dolní Loučky, Brno – venkov, Czech Republic). A one-year life cycle was recorded but the development of larvae was not well synchronized. As a result, the population of P. flavomaculatus was formed by a mosaic of different instars, which enabled the species to exploit the environment efficiently and, therefore, the abundance was high (the average density was 1.370 larvae/m2). The food composition of different instars was studied using preparations of the contents of larval proventriculi, II. – V. instars were evaluated. The larvae fed as predators or scavengers, the share of non-animal food was lower than 20% at all instars.
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