Abundance, biting behaviour and parous rate of anopheline mosquito species in relation to malaria incidence in gold-mining areas of southern Venezuela

2007 ◽  
Vol 21 (4) ◽  
pp. 339-349 ◽  
Author(s):  
J. E. MORENO ◽  
Y. RUBIO-PALIS ◽  
E. PÁEZ ◽  
E. PÉREZ ◽  
V. SÁNCHEZ
2018 ◽  
Vol 10 (2) ◽  
pp. 267-272
Author(s):  
Ebube Charles Amaechi ◽  
Onyinye Mkpola Ukpai ◽  
Carmelita Chima Ohaeri ◽  
Uzoamaka Blessing Ejike ◽  
Ozioma Prisca Irole-Eze ◽  
...  

The abundance of Anopheline mosquito species is the most common entomological measurement to determine the relationship between vectors and malaria incidence. We conducted an entomological survey to determine mosquito species diversity and abundance in relation to rainfall in Omi reservoir irrigation area, Nigeria. We collected adult mosquitoes from 10 randomly selected residential houses using Pyrethrum spray sheet and Human Landing Catch methods. We grouped the samples into irrigated (intervention) and non-irrigated (control) communities. During the 12-month sampling period, we collected a total of 4 285 mosquitoes belonging to 10 species in one family. The three most common species during this study were Anopheles gambiae, Anopheles funestus and Culex quinquefasciatus. Irrigated community has higher numbers of mosquitoes (69,4%) compared to those collected in non-irrigated community (32,0%). Comparing the two collection methods used, Pyrethrum spray sheet has a greater number 2 225(75,4%) of mosquitoes than those with Human Landing Catch method 724(24,6%). During dry season, we collected fewer mosquitoes. The lowest number was collected in February (114) and the highest occurring during the wet season in July (445).


2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Juliana Siqueira-Gay ◽  
Luis E. Sánchez

AbstractIncreased prices and political pressure are boosting illegal gold mining in the Brazilian Amazon, threatening forests, indigenous people, and conservation of biodiversity in protected areas. The rate of illegal mining deforestation increased more than 90% from 2017 to 2020, reaching 101.7 km2 annually in 2020 compared to 52.9 km2 annually in 2017. In that period, illegal mining deforestation rate grew more than the rate of clearing within mining leases. While formal mining is required to comply with environmental regulations, most small-scale or artisanal mining and especially illegal mining areas are abandoned after reserves are exhausted, without proper rehabilitation. Deforestation due to illegal mining is likely to increase in the next years, calling for coordination between local and regional policies as well as for strengthening and expanding international mechanisms to increase traceability of mineral supply chains with certification schemes to help to curb illegal mining.


Insects ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 546
Author(s):  
Mara Moreno-Gómez ◽  
Rubén Bueno-Marí ◽  
Miguel. A. Miranda

Worldwide, pyrethroids are one of the most widely used insecticide classes. In addition to serving as personal protection products, they are also a key line of defence in integrated vector management programmes. Many studies have assessed the effects of sublethal pyrethroid doses on mosquito fitness and behaviour. However, much remains unknown about the biological, physiological, demographic, and behavioural effects on individual mosquitoes or mosquito populations when exposure occurs via spatial treatments. Here, females and males of two laboratory-reared mosquito species, Culex pipiens and Aedes albopictus, were exposed to five different treatments: three doses of the pyrethroid prallethrin, as well as an untreated and a negative control. The effects of each treatment on mosquito species, sex, adult mortality, fertility, F1 population size, and biting behaviour were also evaluated. To compare knockdown and mortality among treatments, Mantel–Cox log-rank tests were used. The results showed that sublethal doses reduced mosquito survival, influencing population size in the next generation. They also provided 100% protection to human hosts and presented relatively low risks to human and environmental health. These findings emphasise the need for additional studies that assess the benefits of using sublethal doses as part of mosquito management strategies.


2006 ◽  
Vol 368 (1) ◽  
pp. 320-325 ◽  
Author(s):  
Zuleica C. Castilhos ◽  
Saulo Rodrigues-Filho ◽  
Ana Paula C. Rodrigues ◽  
Roberto C. Villas-Bôas ◽  
Shefa Siegel ◽  
...  

2018 ◽  
Vol 26 (5) ◽  
pp. 4924-4937 ◽  
Author(s):  
Felix Samuel Olise ◽  
Samuel Adedigba Adeojo ◽  
Oyediran Kayode Owoade ◽  
Oyebamiji Oyedele Oketayo ◽  
Solomon Adeniyi Adekola ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Ermi Ndoen ◽  
Clyde Wild ◽  
Pat Dale ◽  
Neil Sipe ◽  
Mike Dale

The aim of this paper was to relate anopheline mosquito longevity to malaria incidence in two areas in Indonesia: West Timor and Central Java. We estimated the physiological age of females captured landing on humans or resting inside and outside buildings. The estimate was based on the state of the ovaries and was used to estimate longevity. The results showed that there were large differences between the two areas surveyed. In West Timor the longevity of the anophelines ranged from 13 to 23 days, sufficient for completing the intrinsic incubation cycle and for malaria transmission, whereas in Central Java the longevity was only 3 days, insufficient both for incubation and for transmission. We concluded that the West Timor study area had a greater risk of malaria transmission than that of Central Java and this was supported by village survey data that showed greater malaria incidence in West Timor than in Central Java.


1989 ◽  
Vol 87-88 ◽  
pp. 233-240 ◽  
Author(s):  
Wolfgang C. Pfeiffer ◽  
Luiz Drude de Lacerda ◽  
Olaf Malm ◽  
Cristina Maria M. Souza ◽  
Ene Gloria da Silveira ◽  
...  

2019 ◽  
Vol 3 (2) ◽  
pp. 216-222
Author(s):  
Yusuf Rumbino ◽  
Fani Serangmo ◽  
Herry Zadrak Kotta ◽  
Woro Sundari ◽  
Ika Krisnasiwi ◽  
...  

Abstract   Exploitation of natural resources through unlicensed gold mining (PETI) is not in accordance with mining operational standards occurring along the Noeltoko River, West Miomaffo Subdistrict, Timor Tengah Utara Regency, East Nusa Tenggara Province resulting in damage and environmental degradation. Changes and environmental damage include the formation of dug holes around the river flow, turbidity of water, changes in river flow. Other problems that arise are conflicts between these PETI workers and with other communities. This community service activity aims to provide an understanding to the community about the importance of maintaining and caring for rivers from excavation in the river walls that can cause debris / landslides explaining the impact of the use of hazardous materials such as mercury / mercury and cyanide, socialization of regulations regarding the formation of People's Mining Areas (WPR) ), introducing "sluice box" equipment to help the process of separating gold sand from sand. This activity was supported by the UPT ESDM Atambua Branch and was followed by 40 people who used to mine on the Noeltoko river. It is expected that the guidance and assistance can raise public awareness to be able to mine but still preserve the environment   Keyword: PETI, Noeltoko, WPR, sluicebox,   Abstrak   Eksploitasi sumber daya alam melalui Penambangan Emas Tanpa Izin (PETI) tidak sesuai dengan standar operasional penambangan terjadi di sepanjang sungai Noeltoko-Kecamatan Miomaffo Barat, Kabupaten Timor Tengah Utara Propinsi Nusa Tenggara Timur yang mengakibatkan kerusakan dan penurunan kualitas lingkungan. Perubahan dan kerusakan lingkungan tersebut diantaranya terbentuk lubang-lubang galian di sekitar aliran sungai, kekeruhan air, berubahnya aliran sungai.. Permasalahan lain yang timbul adalah konflik antar pekerja PETI ini maupun dengan masyarakat lain. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan pemahaman kepada masyarakat mengenai pentingnya menjaga dan merawat sungai dari penggalian di dinding sungai yang dapat mengakibatkan runtuhan/longsoran menjelaskan dampak penggunaan bahan berbahaya seperti air raksa/merkuri dan sianida, sosialisasi peraturan tentang pembentukan Wilayah Pertambangan Rakyat (WPR), mengenalkan peralatan “sluice box” untuk membantu proses pemisahan buiran emas dari pasir.Kegiatan ini didukung oleh pihak UPT ESDM Cabang Atambua dan dikuti oleh 40 orang masyarakat yang biasa menambang di sungai Noeltoko. Diharapkan dengan adanya pembinaan dan pendampingan dapat menimbulkan kesadaran masyarakat untuk dapat menambang namun tetap menjaga kelestarian lingkungan   Kata kunci: PETI, Noeltoko, WPR, sluicebox


Sign in / Sign up

Export Citation Format

Share Document