Shallow lentic freshwater aquatic systems are globally important emitters of methane (CH 4 ), a highly potent greenhouse gas. Previous laboratory studies indicated that bioturbation by chironomids can reduce CH production and increase oxidation enhancing oxygen transport into sediment. Thus, reduction in chironomid density application biocides for mosquito control, such as Bacillus thuringinesi...

To predict the response of aquatic ecosystems to future global climate change, data on the ecology and distribution of keystone groups in freshwater ecosystems are needed. In contrast to mid- and high-latitude zones, such data are scarce across tropical South America (Neotropics). We present the distribution and diversity of chironomid species using surface sediments of 59 lakes from the Andes ...

The uptake kinetics of waterborne Ca and Cd, both independently and in combination, were examined in C. riparius larvae, which are extremely Cd tolerant. Larvae exposed to Ca (100-2500 micromol L(-1)), exhibited classic Michaelis-Menten saturation kinetics for Ca influx, measured using (45)Ca as a radio-tracer. The maximum rate of Ca influx (J(max)(Ca)) was 0.39 micromol g(-1)h(-1), and the Ca ...

Dispersion or dilution of stool by water from heavy rainfall may affect Strongyloides stercoralis free-living development producing infective filariform larvae (FL). This study examined effect of water dilution of stool on survival of S. stercoralis free-living development. One g of stool was prepared in water so that its soluble component was diluted sequentially from 1:2 to 1:480. Three dishe...

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A 102-day feeding trial was conducted to evaluate the effects of four different fish patterns on carp pond water quality and antioxidant biomarkers [superoxide dismutase (SOD), Catalase (CAT), Glutathione peroxidase (GPx), reductase (GR), S-transferase (GST) Thiol groups (SH)], protein content biomass midge Chironomus plumosus. Farmed were fed two commercial diets: Soprofish 25/7 Standard (cont...