Open AccessESTIMATING POPULATION DENSITY OF A CYRTOBAGOUS SP. (COLEOPTERA: CURCULIONIDAE) ON THE FLOATING WEED SALVINIA USING BERLESE FUNNELS
Author(s) -
Boland N. P.,
Room P. M.
Publication year - 1983
Publication title -
australian journal of entomology
Language(s) - English
Resource type - Journals
eISSN - 1440-6055
pISSN - 1326-6756
DOI - 10.1111/j.1440-6055.1983.tb02117.x
Subject(s) - curculionidae , biology , weed , population density , population , botany , horticulture , agronomy , demography , sociology
Salvinia containing 4 known population densities of adult Cyrtobagous sp. was dried in Berlese funnels. Weevils extracted were counted at 8 one‐hour intervals and at 24 h when the plant material was dry. Averaged over all population densities 47% of the weevils had been recovered after 4 h, 84% after 8 h and 95% after 24 h. Extraction was slightly more efficient at higher population densities.