Massive mosquito nuisance problems, caused by the flood-water mosquito Aedes sticticus, occur after floods in the flood plains of the River Dalälven, central Sweden. Since 2002, the biological mosquito larvicide Bacillus thuringiensis var. israelensis (Bti) has been used to control these mosquitoes. Here, we report results from the first six years of monitoring Chironomidae, the most susceptibl...

BACKGROUND & OBJECTIVES The predatory potential of the larvivorous fishes can be affected by the presence of alternative preys. In the present study the predation pattern of the sewage dwelling Poecilia reticulata (Peters 1872) on the larvae of Culex quinquefasciatus Say 1823 (Diptera: Culicidae) was evaluated in the presence of alternative preys. METHODS The predation of Cx. quinquefasciatus...

(With One Text-figure) Tendipes (= Chironomus) plumosus larvae are unique among species of Tendipes in employing a filter-feeding mechanism for obtaining their food (Walshe, 1947 a). The larva spins a sheet of salivary secretion across the lumen of its tube, after which, by rapid anteroposterior undulations of the body, it irrigates the tube. Plankton or other organic particles in the incoming ...

Abstract The Younger Dryas-Holocene transition represents a period of significant thermal change, comparable in magnitude to modern warming, yet colder context and without the effect anthropogenic disturbance. This is useful as reference tackle how biodiversity affected by temperature natural conditions. Here, we addressed change during this southern Baltic coastal lake (Konarzewo Lake, Poland)...

Polytene chromosomes of chironomid larvae (Diptera: Chironomidae), collected on the Wrangel Island are described. Larvae have 2n=8: AB, CD, EF, G (Ch. thummi Keyl, 1962 complex). By karyotype larvae are identical to Chironomus sp. Le1, described from the Sagystyr Island of the Ust-Lena Reserve (Yakutia) (Kiknadze et al., 1996). The insignificant differences include the number of nucleoli and pu...

Methods and growth chambers are described which permit in situ estimates of the growth rates of chironomid larvae inhabiting litter accumulations in lotic habitats. Instantaneous growth rates (IGRs) for larvae of different sizes ranged from 0.01 to 0.24 mg mg-l ash-free dry mass (AFDM) d-l at stream temperatures of 2.9”15.1”C. IGRs were significantly and linearly related to temperature. Regress...

Oukuriella Epler, 1986 is an exclusively Neotropical genus that comprises two well supported clades: inhabitants of freshwater sponges and inhabitants of immersed wood (saproxylophilic). In this work, males of a new chironomid species, Oukuriella froehlichi sp. n., are described and illustrated. Specimens were collected near stream in the Brazilian Atlantic Forest. Phylogenetic analyses perform...