The influence of larval density on triacylglycerol content in Aedes aegypti (Linnaeus) (Diptera: Culicidae)

2020 ◽  
Author(s):  
Elaine R. M. N. Silva ◽  
Luan V. Santos ◽  
Matheus S. Caiado ◽  
Luana S. N. Hastenreiter ◽  
Sabrina R. R. Fonseca ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larval Density ◽  
Triacylglycerol Content

scholarly journals Impacts of diurnal temperature and larval density on aquatic development of Aedes aegypti

PLoS ONE ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. e0194025 ◽  
Author(s):  
Josef Zapletal ◽  
Madhav Erraguntla ◽  
Zach N. Adelman ◽  
Kevin M. Myles ◽  
Mark A. Lawley
Keyword(s):  
Aedes Aegypti ◽  
Larval Density ◽  
Diurnal Temperature

scholarly journals Mating Competitiveness of Transgenic Aedes aegypti (Diptera: Culicidae) Males Against Wild-Type Males Reared Under Simulated Field Conditions

2020 ◽  
Vol 57 (6) ◽  
pp. 1775-1781
Author(s):  
David S Kang ◽  
Joanne M Cunningham ◽  
Diane D Lovin ◽  
Dave D Chadee ◽  
David W Severson
Keyword(s):  
Aedes Aegypti ◽  
Environmental Stress ◽  
Environmental Conditions ◽  
Mating Success ◽  
Genetically Modified ◽  
Field Isolate ◽  
Larval Density ◽  
Laboratory Strain ◽  
Adult Mosquito ◽  
Male Mating

Abstract Efforts directed at genetic modification of mosquitoes for population control or replacement are highly dependent on the initial mating success of transgenic male mosquitoes following their release into natural populations. Adult mosquito phenotypes are influenced by the environmental conditions experienced as larvae. Semifield studies conducted to date have not taken that under consideration when testing male mating fitness, and have compared mating success of males reared under identical environmental conditions. We performed pairwise mating challenges between males from a genetically modified laboratory strain (BF2) versus males from a recent Trinidad field isolate of Aedes aegypti (L.), a major vector of multiple arboviruses. We utilized larval density and nutrition to simulate environmental stress experienced by the Trinidad males and females. Our results indicated that environmental stress during larval development negatively influenced the competitiveness and reproductive success of males from the Trinidad population when paired with optimum reared BF2 males. Small (0.027 m3) and large (0.216 m3) trials were conducted wherein stressed or optimum Trinidad males competed with optimum BF2 males for mating with stressed Trinidad females. When competing with stress reared Trinidad males, optimum reared BF2 males were predominant in matings with stress reared Trinidad females, and large proportions of these females mated with males of both strains. When competing with optimum reared Trinidad males, no difference in mating success was observed between them and BF2 males, and frequencies of multiple matings were low. Our results indicate that future mating competition studies should incorporate appropriate environmental conditions when designing mating fitness trials of genetically modified males.

scholarly journals The Effect of Rekattidiri Ovitrap towards Aedes aegypti Larval Density

2017 ◽  
Vol 6 (1) ◽  
pp. 80
Author(s):  
Malik Saepudin ◽  
Soeharyo Hadisaputro ◽  
Ari Suwondo ◽  
Suhartono Suhartono
Keyword(s):  
Experimental Design ◽  
Aedes Aegypti ◽  
Larval Density ◽  
Hemorrhagic Fever ◽  
Control Group ◽  
P Value ◽  
Dengue Disease ◽  
Density Index ◽  
Quasi Experimental ◽  
The Mean

Dengue Hemorrhagic Fever (DHF) is a health problem in Indonesia. The entire region of Indonesia at risk of contracting dengue disease. The study aims to prove the effect of modifications ovitrap rekattidiri on the density of larvae (HI: House Index, CI: Container Index and BI: Breteu Index) as well as comparing the differences between the mean larvae trapped between ovitrap Rekattidiri with standard ovitrap. Using a quasi experimental design, time series experimental design with Control group. Population subjects were Aedes aegypti at the endemic sites in Pontianak, West Borneo. The results showed larval density index in the intervention area decreased each ie HI from 26% to 3%, CI of 6.95% to 2.19 %, and BI from 29% to 13%. The number of larvae trapped in ovitrap rekattidiri ie 70% (12,770 larvae) more than the standard ovitrap in the control and intervention, namely: 17% (3,057 larvae) and 13% (2,334 larvae). It is concluded that there are significant modifications Rekattidiri ovitrap against larval density index (HI p-value: 0.025, CI p-value: 0.052, BI value of p: 0.04) and there are differences between the mean larvae trapped in ovitrap Rekattidiri and standard ovitrap with p value: 0.001.

scholarly journals Hubungan Tempat Perindukan dengan Kepadatan Larva Aedes aegypti sebagai Vektor Penyakit Demam Berdarah Dengue di Wilayah Kerja Puskesmas Kalumata Kota Ternate (Relationship of the Breeding Place with the Density of Aedes aegypti Larva as a Dengue Haemorhagic Fever Disease Vector in the Working Area of Kalumata Puskesmas Ternate City)

2019 ◽  
Vol 9 (2) ◽  
pp. 62
Author(s):  
Sitti Washliyah ◽  
Dantje Tarore ◽  
Christina Salaki
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Larval Density ◽  
Chi Square ◽  
Cross Sectional ◽  
Breeding Sites ◽  
Disease Vector ◽  
Relationship Of ◽  
Used Goods ◽  
Breeding Place

Hubungan Tempat Perindukan dengan Kepadatan Larva Aedes aegypti sebagai Vektor Penyakit Demam Berdarah Dengue di Wilayah Kerja Puskesmas Kalumata Kota Ternate (Relationship of the Breeding Place with the Density of Aedes aegypti Larva as a Dengue Haemorhagic Fever Disease Vector in the Working Area of Kalumata Puskesmas Ternate City) Sitti Washliyah¹*), Dantje Tarore1), Christina Salaki1**)¹)Program Studi Entomologi Pascasarjana Universitas Sam Ratulangi Manado, 95115*Email:[email protected]**Email korespondensi: [email protected] Diterima 2 Juli 2019, diterima untuk dipublikasi 5 Agustus 2019 Abstrak Demam berdarah dengue merupakan salah satu penyakit yang disebabkan oleh nyamuk Aedes aegypti dan Aedes albopictus sebagai vektor primer. Pengendalian tempat perindukan nyamuk Ae. aegypti lebih banyak dititikberatkan pada penutupan dan abatisasi bak mandi serta penguburan barang-barang bekas di sekitar rumah penduduk yang berpeluang sebagai penampung air hujan, sementara penampung air lainnya belum mendapat perhatian yang lebih memadai, padahal peluang untuk dijadikan sebagai habitat Ae. aegypti cukup besar. Tujuan penelitian ini yaitu untuk menganalisis hubungan tempat perindukan dengan kepadatan larva dan membandingkan kepadatan populasi larva pada setiap tempat perindukan nyamuk Ae. aegypti. Jenis penelitian kuantitatif dengan pendekatan cross sectional dan analisa uji chi square yang dilaksanakan di wilayah kerja Puskesmas Kalumata Kota Ternate. Hasil penelitian menunjukan bahwa ada hubungan antara tempat perindukan nyamuk dengan kepadatan larva berdasarkan karakteristik jenis, warna, bahan, letak dan kondisi. Kesimpulannya yaitu terdapat hubungan antara tempat perindukan dengan kepadatan larva Ae.aegypti sebagai vektor penyakit demam berdarah dengue.Kata kunci: Identifikasi, tempat penampungan air, survey jentik.  AbstractDengue hemorrhagic fever is a disease caused by mosquitoes species Aedes aegypti and Aedes albopictus as primary vectors. Control of breeding sites for Ae mosquitoes. aegypti is more focused on the closure and abatement of bathtubs and the burial of used goods around people's homes that have the opportunity to collect rainwater, while other water reservoirs have not received more adequate attention, even though the opportunity to be used as Ae habitat. aegypti is quite large. The purpose of this study was to determine the relationship between breeding sites with larval density and compare larval population densities at each breeding site of the Ae mosquito. aegypti. Type of quantitative research method with cross sectional approach and analysis of chi square test conducted in the working area of Kalumata Health Center, Ternate City. The results showed that there was a relationship between mosquito breeding sites and larval density based on the characteristics of the species, color, material, location and condition. The conclusion is that there is a relationship between breeding sites and the density of Ae.aegypti larvae as a vector of dengue hemorrhagic fever.Keywords: Identification, water reservoir, larva survey.

scholarly journals Larval density mediates knockdown resistance to pyrethroid insecticides in adult Aedes aegypti

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Marissa K. Grossman ◽  
Valentin Uc-Puc ◽  
Adriana E. Flores ◽  
Pablo C. Manrique-Saide ◽  
Gonzalo M. Vazquez-Prokopec
Keyword(s):  
Aedes Aegypti ◽  
Larval Density ◽  
Knockdown Resistance ◽  
Pyrethroid Insecticides

scholarly journals Differential effects of conspecific and heterospecific density on the development of Aedes aegypti and Aedes albopictus larvae

2018 ◽  
Author(s):  
Robert S Paton ◽  
Katherine Heath ◽  
Anthony J Wilson ◽  
Michael B Bonsall
Keyword(s):  
Aedes Aegypti ◽  
Interspecific Competition ◽  
Resource Availability ◽  
Larval Density ◽  
Single Species ◽  
List Type ◽  
Contest Competition ◽  
Species Competition ◽  
Demographic Stochasticity ◽  
Successful Development

AbstractBetween-species competition shapes the distribution and abundance of populations. Aedes aegypti and Ae. albopictus are vectors of pathogens such as dengue and are known to compete at the larval stage.The outcome of this inter-species competition has been found to be context dependent, with the strength and direction changing with resource availability and type. We were motivated by this uncertainty, and aimed to elucidate the magnitude and mechanism of competition.We manipulated the larval density of mixed and single species cohorts of larvae, measuring the effects on survivorship and development time. Unlike other related studies, we adjusted the feeding regime so that the per-capita resource availability was kept constant across all density treatments, at a level sufficient for successful development. This ensured that each larvae at least had the opportunity to gain the requisite resources for pupation.Our analysis found that Ae. aegypti suffered notably less mortality due to intra- and interspecific competition. For both species, intra- and interspecific competition led to the survival of faster developing individuals, with the exception that slower developing Ae. albopictus larvae survived when exposed a combination of both high con- and heterospecific densities.These results show that the competition between Ae. aegypti and Ae. albopictus can still occur even when resources are theoretically adequate for development. This suggests that larvae can alter resource seeking and consumption parameters when exposed to high densities of conspecifics and heterospecifics, leading to contest competition. Evidence for resource-independent mechanisms of competition such as crowding are also found, as is evidence for the importance of demographic stochasticity in population processes.

scholarly journals Larval breeding sites of the mosquito Aedes aegypti in forest and domestic habitats in Africa and the potential association with oviposition evolution

2021 ◽  
Author(s):  
Siyang Xia ◽  
Hany Dweck ◽  
Joel Lutomiah ◽  
Rosemary Sang ◽  
Carolyn McBride ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Field Experiments ◽  
Larval Density ◽  
Oviposition Preference ◽  
Vital Role ◽  
Breeding Sites ◽  
Microbial Density ◽  
Habitat Transition ◽  
Behavioral Divergence ◽  
Global Vector

Adaptations to anthropogenic domestic habitats contribute to the success of mosquito Aedes aegypti as a major global vector of several arboviral diseases. The species inhabited African forests before expanding into domestic habitats and spreading to the rest of the world. Despite a well-studied evolutionary history, how this species initially moved into human settlements in Africa remains unclear. During this initial habitat transition, Ae. aegypti switched from using natural containers like tree holes as larval breeding sites to using artificial containers like clay pots. Little is known about how these natural versus artificial containers differ in their environments, or whether Ae. aegypti in forest versus domestic habitats evolved any corresponding incipient behavioral divergence, such as in oviposition. To address these gaps, we first characterized physical characteristics, larval density, microbial density, bacterial composition, and volatile profiles of natural versus artificial containers used as mosquito larval breeding sites. We focused on two localities in Africa, La Lopé, Gabon and Rabai, Kenya. In both localities, our data showed that the two habitat-specific container types had significantly different characteristics. We then examined whether such containers differed in their attractiveness for oviposition, a key behavior affecting larval distribution. Forest Ae. aegypti readily accepted artificial containers in our field experiments, and laboratory choice experiments did not find distinct oviposition preference between forest and village Ae. aegypti colonies. These results suggested that African Ae. aegypti were likely generalists in their oviposition site choice. This flexibility to accept different containers might play a vital role during the initial domestication of Ae. aegypti, allowing the mosquitoes to use human-stored water as fallback breeding sites during dry seasons. Although ovipositional changes were not present initially, after longer domestic habitat breeding, the mosquitoes did evolve divergence oviposition preference, as suggested by previous comparisons of African Ae. aegypti and human-specialized non-African Ae. aegypti.

scholarly journals The Effect of Rekattidiri Ovitrap towards Aedes aegypti Larval Density

2017 ◽  
Vol 6 (1) ◽  
pp. 78
Author(s):  
Malik Saepudin ◽  
Soeharyo Hadisaputro ◽  
Ari Suwondo ◽  
Suhartono Suhartono
Keyword(s):  
Experimental Design ◽  
Aedes Aegypti ◽  
Larval Density ◽  
Hemorrhagic Fever ◽  
Control Group ◽  
P Value ◽  
Dengue Disease ◽  
Density Index ◽  
Quasi Experimental ◽  
The Mean

Dengue Hemorrhagic Fever (DHF) is a health problem in Indonesia. The entire region of Indonesia at risk of contracting dengue disease. The study aims to prove the effect of modifications ovitrap rekattidiri on the density of larvae (HI: House Index, CI: Container Index and BI: Breteu Index) as well as comparing the differences between the mean larvae trapped between ovitrap Rekattidiri with standard ovitrap. Using a quasi experimental design, time series experimental design with Control group. Population subjects were Aedes aegypti at the endemic sites in Pontianak, West Borneo. The results showed larval density index in the intervention area decreased each ie HI from 26% to 3%, CI of 6.95% to 2.19 %, and BI from 29% to 13%. The number of larvae trapped in ovitrap rekattidiri ie 70% (12,770 larvae) more than the standard ovitrap in the control and intervention, namely: 17% (3,057 larvae) and 13% (2,334 larvae). It is concluded that there are significant modifications Rekattidiri ovitrap against larval density index (HI p-value: 0.025, CI p-value: 0.052, BI value of p: 0.04) and there are differences between the mean larvae trapped in ovitrap Rekattidiri and standard ovitrap with p value: 0.001.

scholarly journals The Fluctuation of Aedes Aegypti in Endemic Area of Dengue Hemorrhagic Fever in Surabaya City, Indonesia

2010 ◽  
Vol 1 (2) ◽  
pp. 60 ◽  
Author(s):  
Subagyo Yotopranoto ◽  
Kusmartisnawati Kusmartisnawati ◽  
Kris Cahyo Mulyatno ◽  
Heny Arwati
Keyword(s):  
Aedes Aegypti ◽  
Rainy Season ◽  
Endemic Area ◽  
Larval Density ◽  
Hemorrhagic Fever ◽  
Critical Threshold ◽  
Haemorrhagic Fever ◽  
Breeding Sites ◽  
Safe Limit ◽  
Density Pattern

This research was aimed to describe the density pattern and the fluctuation of Aedes aegypti larval based on the season in dengue haemorrhagic fever (DHF) endemic area in Surabaya city. The population of the research was the house of people together with its breeding sites either inside and outside the house. The 55 houses were randomly chosen in 11 RWs in Nginden Subdistrict. The sample of this research was Aedes aegypti larva obtained from its breeding sites. The sample sizes were all of the larval in the containers existed in the chosen houses. The samples of the larval were taken and carried for identification and documentation of the species. This research was applied in the same houses in January, March, and May 2008 in rainy season. The results indicated that the highest larval index occurred in January with House Index (HI) 76.8%, Container Index (CI) 40.5%, and Breteau Index (BI) 137.5%. There was a decrease in March with HI 63.3%, CI 31.3%, and BI 92.7%. It continued to decrease in May with HI 42.6%, CI 21.1%, and BI 57.4%. All of those larval indices in the three observed months showed a high percentage of larval which was much higher than the safe limit or the critical threshold (5%) as defined by WHO. It implied that people in Nginden Subdistrict were threaten by the infection of DHF. The three indices achieved the peak in January, which was also the peak of the rainy season. It gradually decreased in March and May as the rainy season decreased its intensity of rain. Larval Density Index (LDI) also showed a high value. There were 173 larval/house in January, 187 larval/house in March, and 84.8 larval/house in May. The containers or breeding sites of Aedes were mostly found in January then their existences gradually decreased in March and May. Traditional bath tub was the most productive container inside the house, while drum and bucket were the most productive containers outside the house. Other containers which contributed abundance of larval were refrigerator, flower pot, well, and PDAM meter box.

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