18 research outputs found
Coleoptera associated with pig carcass exposed in a forest reserve, Manaus, Amazonas, Brazil
Relative abundance and species composition of some dung beetles (Coleoptera: Scarabaeinae) in Bangladesh
Are ball-rolling (Scarabaeini, Gymnopleurini, Sisyphini) and tunnelling scarabaeine dung beetles equally choosy about the size of ingested dung particles?
Evaluating longâterm ivermectin use and the role of dung beetles in reducing shortâterm CH4 and CO2 emissions from livestock faeces: a mesocosm design under Mediterranean conditions
1. Greenhouse gas (GHG) emissions from livestock contribute significantly to global warming, and a reduction of this source of emissions is crucial in achieving the goal of mitigating global warming. 2. CO2 and CH4 emissions from dung pats were analysed by means of a mesocosm experiment in a Mediterranean ecosystem. The experiment consisted of a total of 30 mesocosms distributed across three treatments: a wellâpreserved, undisturbed dung beetle assemblage associated with organic livestock; a dung beetle assemblage that was impoverished as a result of the longâterm use of veterinary medical products; and a control treatment without dung beetles. 3. Corrections related to insect respiration allow researchers to provide more precise measurements of CO2 emissions from dung, especially in the initial and final phases of dung exposure, when the percentage of CO2 emitted by dung beetles can become greater than the emissions from the dung pats themselves. 4. The effects of dung beetles on CO2 and CH4 emissions are much more accentuated in warmâtemperate conditions than in northern temperate areas previously studied. Mediterranean assemblages remove and spread dung faster and more effectively than do northern dung beetle assemblages characterised by a lower functional richness and beetle abundance and biomass. 5. From a livestock management viewpoint, mesocosms representing areas with impoverished dung beetle assemblages, due to the longâterm use of veterinary medical products, such as ivermectin, emitted 1.6â and 2.8âfold higher total CO2 and CH4, respectively, than mesocosms mimicking sites with untreated livestock.Financial support was provided by the projects CGL2015-68207-R of the SecretarĂa de Estado de InvestigaciĂłn, Ministerio de EconomĂa y Competitividad