scholarly journals Entomological Survey for Aedes Species at Deendayal Seaport, Kandla, Gujarat India during Pre-Monsoon Period, 2018

2020 ◽  
Vol 52 (04) ◽  
pp. 35-38
Author(s):  
Amarpal Singh Bhadauriya ◽  
Keyword(s):  
Monsoon Season ◽  
Mosquito Species ◽  
Residential Areas ◽  
Entomological Surveillance ◽  
Wet Season ◽  
Monsoon Period ◽  
Entomological Survey ◽  
Port Area ◽  
Breeding Habitats ◽  
Vector Mosquito

Entomological survey was conducted at Kandla international seaport, Kandla, Gujarat, India during pre-monsoon season of 2018 for immature Aedes mosquitoes. Standard entomological techniques were used for survey. All approachable larval breeding habitats were inspected. Inside seaport area, a total of 45 premises were searched for Aedes breeding out of which 02 premises were found inside area of seaport with 4.44 Premises Index (PI), 1.77 Container Index (CI) and 4.44 Breteau Index (BI). Out-side area of seaport (non-residential), none of premises/ containers were found positive for breeding while in out-side residential area 27 were searched out of which 02 houses were found positive for Aedes breeding with 7.4 House Index (HI), 8.10 Container Index (CI) and 11.11 Breteau Index (BI). Intermittent supply of water was the main reason for Aedes breeding in residential colony. From this study it is evident that inside port area and outside port area provided ample habitats for the mosquitoes to breed and thrive in wet season. Regular entomological surveillance is needed not only to monitor the Aedesmosquito breeding in and around port area including residential areas nearby but also to prevent the transportation and establishment of mosquito species in newer areas. Community awareness is also equally important to prevent entry of vector mosquito species in new areas.

scholarly journals Ambient air quality of Katra Town (J&K): A Study with Reference to atmospheric particulates

2013 ◽  
Vol 14 (1&2) ◽  
pp. 113-119
Author(s):  
Anil K. Raina ◽  
Anita Sharma
Keyword(s):  
Particulate Matter ◽  
Air Quality ◽  
Monsoon Season ◽  
Ambient Air ◽  
Ambient Air Quality ◽  
Residential Areas ◽  
Monsoon Period ◽  
Post Monsoon ◽  
The Impact

The monitoring of ambient air quality of Katra (one of the important town of Jammu from economic as well as religious point of view), at selected locations of residential areas, commercial areas and traffic crossings with respect to particulate matter (both respirable and non-respirable) has been conducted for a period of two years i.e. July 2010 – June 2012. Large variations in ambient particulate matter concentrations have been observed throughout the study period. Seasonally, the particulate matter exhibited low values during monsoon period and high values during post-monsoon period. The concentration of particulates (both respirable and non-respirable) in post monsoon season exceeded the concentrations than that of other seasons at most of the sites, thereby signifying the impact of local factors on pollutant concentrations, besides the impact of meteorological factors. Higher concentrations have been recorded in the year 2011-2012 as compared to 2010-2011 at all the sites except traffic crossings.

scholarly journals Diversities of mosquito species of different locations in Dhaka city

2018 ◽  
Vol 28 (4) ◽  
pp. 295-301
Author(s):  
MG Sharower ◽  
MA Latif
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Botanical Garden ◽  
High Density ◽  
Dhaka City ◽  
Dengue Vector ◽  
Larval Habitats ◽  
Dengue Viruses ◽  
Breeding Habitats ◽  
Vector Mosquito

A yearlong (Jul-15 to June-16) intensive survey was conducted to document the diversity and density of different mosquito species, breeding habitats and their status at different park in Dhaka city. A total of 11 species of mosquito were identified from the six study areas. The recorded species were An. annularis, An. culicifacies, Ae. albopictus, Ae. aegypti, Ar. subalbatus, Cx. fuscocephala, Cx. quinquefasciatus, Cx. tritaeniorhynchus, Mn. annulifera, Mn. uniformis, Tx. splendidus. Aedes albopictus (38.18%) and Ar. subalbatus (37.47%) were the predominant mosquito species followed by Cx. quinquefasciatus. Others species were found in moderate percentage. Lowest density of Cx. fuscocephala (0.6%) was recorded among the collected mosquito species from the different study area. The highest percentages of mosquito were found in Botanical garden (28.68%) followed by Ramna park, Zia uddyan, Baldha garden, Suhrawardy uddyan, and Osmani uddyan (6.67%). Fifteen different larval habitats were found in the study areas. Majority of the mosquito species was found to breed in pond. High density of Ae. albopictus mosquito were found in all study areas, which is the secondary vector of dengue viruses. Principal dengue vector mosquito, Ae. aegypti were found only in Baldha garden. Ar. subalbatus was also a dominant mosquito species in the entire site.Progressive Agriculture 28 (4): 295-301, 2017

Monitoring global public health threat - surveillance of Aedes (Stegomyia) mosquitoes in new Mangalore sea port, India

ENTOMON ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 15-22
Author(s):  
R. Rajendran ◽  
K. Regu ◽  
J.M. Kurian
Keyword(s):  
Mosquito Species ◽  
International Health ◽  
Global Public Health ◽  
Vector Surveillance ◽  
Entomological Surveillance ◽  
Port Area ◽  
Mosquito Breeding ◽  
And Control ◽  
Health Regulations ◽  
Water Holding

Vector surveillance and control at port of entry (PoE) is an essential activity for the implementation of International Health Regulations (IHR). The present study was undertaken in and around New Mangalore sea port. Inside the port area, a total of 13 water holding containers at 33 premises were checked and no containers were found positive for larval breeding. In the residential area, 132 water holding containers were checked in 100 houses. The breeding preference ratio was highest for earthen containers (18.8) followed by grinding stone (4.72), metal (1.72), cement tank (1.62) and plastic (0.24). The House index, Container index and Breteau index were found to be 7.0, 5.3 and 7.0% respectively. The nearness of residential colony to NMPT, consequently enhances the chances of spreading of Aedes mosquitoes in the port area. From the present study it is evident that inside the sea port there are ample habitats for the mosquitoes to breed and thrive in rainy season. Routine entomological surveillance is required not only to monitor the mosquito breeding in and around port area but also to prevent transportation and establishment of mosquito species in newer areas.

scholarly journals Distribution and larval breeding habitats of Aedes mosquito species in residential areas of northwest Ethiopia

2018 ◽  
Vol 40 ◽  
pp. e2018015 ◽  
Author(s):  
Getachew Ferede ◽  
Moges Tiruneh ◽  
Ebba Abate ◽  
Wondmeneh Jemberie Kassa ◽  
Yitayih Wondimeneh ◽  
...  
Keyword(s):  
Mosquito Species ◽  
Northwest Ethiopia ◽  
Aedes Mosquito ◽  
Residential Areas ◽  
Breeding Habitats

scholarly journals Behavioural response of mosquito vectors Aedes aegypti, Anopheles stephensi and Culex quinquefasciatus to synthetic pyrethroid and organophosphorus-based slow-release insecticidal paint

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Sunil Dhiman ◽  
Kavita Yadav ◽  
B. N. Acharya ◽  
Raj Kumar Ahirwar ◽  
D. Sukumaran
Keyword(s):  
Aedes Aegypti ◽  
Culex Quinquefasciatus ◽  
Anopheles Stephensi ◽  
Slow Release ◽  
Disease Risk ◽  
Mosquito Species ◽  
Escape Time ◽  
Behavioural Avoidance ◽  
Vector Mosquito ◽  
Contact Exposure

Abstract Background The direct toxicological impact of insecticides on vector mosquitoes has been well emphasized; however, behavioural responses such as excito-repellency and physical avoidance as a result of insecticide exposure have not been much studied. We have demonstrated the excito-repellency and behavioural avoidance in certain vector mosquito species on exposure to a slow-release insecticidal paint (SRIP) formulation in addition to direct toxicity. Methods A SRIP formulation developed by the Defence Research and Development Establishment, Gwalior, contains chlorpyriphos, deltamethrin and pyriproxyfen as active insecticides. Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti mosquitoes were used to study the excito-repellency response of the formulation. The experiments were performed in a specially designed dual-choice exposure and escape chamber made of transparent polymethyl methacrylate. For the experiments, the SRIP formulation was applied undiluted at a rate of 8 m2 per kg on 15 cm2 metallic surfaces. Mosquitoes were introduced into the exposure chamber, and observations of the movement of mosquitoes into the escape chamber through the exit portal were taken at 1-min intervals for up to 30 min. Results The evaluated formulation displayed strong excito-repellency against all three tested vector mosquito species. Results showed that the ET50 (escape time 50%) for Ae. aegypti, An. stephensi and Cx. quinquefasciatus was 20.9 min, 14.5 min and 17.9 min for contact exposure (CE) respectively. Altogether in CE, the escape rates were stronger in An. stephensi mosquitoes at different time intervals compared to Ae. aegypti and Cx. quinquefasciatus mosquitoes. The probit analysis revealed that the determined ET did not deviate from linearity for both non-contact exposure (NCE) and placebo exposure (PE) (χ2 ≤ 7.9; p = 1.0) for Ae. aegypti mosquitoes and for NCE (χ2 = 8.3; p = 1.0) and PE (χ2 = 1.7; p = 1.0) treatments in Cx. quinquefasciatus. Mortality (24 h) was found to be statistically higher (F = 6.4; p = 0.02) in An. stephensi for CE but did not vary for NCE (p ≥ 0.3) and PE (p = 0.6) treatments among the tested mosquito species. Survival probability response suggested that all the three tested species displayed similar survival responses for similar exposures (χ2 ≤ 2.3; p ≥ 0.1). Conclusion The study demonstrates the toxicity and strong behavioural avoidance in known vector mosquito species on exposure to an insecticide-based paint formulation. The combination of insecticides in the present formulation will broaden the overall impact spectrum for protecting users from mosquito bites. The efficacy data generated in the study provide crucial information on the effectiveness of the tested formulation and could be useful in reducing the transmission intensity and disease risk in endemic countries.

scholarly journals Medium-range mid-tropospheric transport of ozone and precursors over Africa: two numerical case studies in dry and wet seasons

2007 ◽  
Vol 7 (20) ◽  
pp. 5357-5370 ◽  
Author(s):  
B. Sauvage ◽  
F. Gheusi ◽  
V. Thouret ◽  
J.-P. Cammas ◽  
J. Duron ◽  
...  
Keyword(s):  
Mirror Symmetry ◽  
Monsoon Season ◽  
Trade Flow ◽  
Lower Troposphere ◽  
Hadley Cell ◽  
Scale Model ◽  
Wet Season ◽  
Airborne Measurements ◽  
Ozone Precursors ◽  
Low Level

Abstract. A meso-scale model was used to understand and describe the dynamical processes driving high ozone concentrations observed during both dry and monsoon season in monthly climatologies profiles over Lagos (Nigeria, 6.6° N, 3.3° E), obtained with the MOZAIC airborne measurements (ozone and carbon monoxide). This study focuses on ozone enhancements observed in the upper-part of the lower troposphere, around 3000 m. Two individual cases have been selected in the MOZAIC dataset as being representative of the climatological ozone enhancements, to be simulated and analyzed with on-line Lagrangian backtracking of air masses. This study points out the role of baroclinic low-level circulations present in the Inter Tropical Front (ITF) area. Two low-level thermal cells around a zonal axis and below 2000 m, in mirror symmetry to each other with respect to equator, form near 20° E and around 5° N and 5° S during the (northern hemisphere) dry and wet seasons respectively. They are caused by surface gradients – the warm dry surface being located poleward of the ITF and the cooler wet surface equatorward of the ITF. A convergence line exists between the poleward low-level branch of each thermal cell and the equatorward low-level branch of the Hadley cell. Our main conclusion is to point out this line as a preferred location for fire products – among them ozone precursors – to be uplifted and injected into the lower free troposphere. The free tropospheric transport that occurs then depends on the hemisphere and season. In the NH dry season, the AEJ allows transport of ozone and precursors westward to Lagos. In the NH monsoon (wet) season, fire products are transported from the southern hemisphere to Lagos by the southeasterly trade that surmounts the monsoon layer. Additionally ozone precursors uplifted by wet convection in the ITCZ can also mix to the ones uplifted by the baroclinic cell and be advected up to Lagos by the trade flow.

scholarly journals Difference in the larval susceptibility to pyriproxyfen in nine colonies of six vector mosquito species

2003 ◽  
Vol 54 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Tomomitsu SATHO ◽  
Yoshio TSUDA ◽  
Pradya SOMBOON ◽  
Hitoshi KAWADA ◽  
Masahiro TAKAGI
Keyword(s):  
Mosquito Species ◽  
Vector Mosquito ◽  
Larval Susceptibility

Frequency Modes of Monsoon Precipitation in Arizona and New Mexico

2006 ◽  
Vol 134 (12) ◽  
pp. 3774-3781 ◽  
Author(s):  
Anne W. Nolin ◽  
Eileen A. Hall-McKim
Keyword(s):  
New Mexico ◽  
Wavelet Analysis ◽  
Monsoon Season ◽  
Intraseasonal Variability ◽  
Low Frequency ◽  
North American Monsoon ◽  
Monsoon Precipitation ◽  
Monsoon Period ◽  
The North ◽  
Spectral Analysis Method

Abstract The interannual and intraseasonal variability of the North American monsoon is of great interest because a large proportion of the annual precipitation for Arizona and New Mexico arrives during the summer monsoon. Forty-one years of daily monsoon season precipitation data for Arizona and New Mexico were studied using wavelet analysis. This time-localized spectral analysis method reveals that periodicities of less than 8 days are positively correlated with mean daily precipitation during the 1 July–15 September monsoon period. Roughly 17% of the years indicate no significant periodicity during the monsoon period for either region and are associated with low monsoon precipitation. High- and low-frequency modes explain an equivalent percentage of the variance in monsoon precipitation in both Arizona and New Mexico, and in many years concurrent multiple periodicities occur. Wavelet analysis was effective in identifying the contribution of high-frequency modes that had not been discerned in previous studies. These results suggest that precipitation processes during the monsoon season are modulated by phenomena operating at synoptic (2–8 days) and longer (>8 days) time scales and point to the need for further studies to better understand the associated atmospheric processes.

Classification of Wild Vector Mosquito Species using Convolutional Neural Networks

2021 ◽  
Vol 27 (11) ◽  
pp. 503-509
Author(s):  
Junyoung Park ◽  
Dong In Kim ◽  
Hyung Wook Kwon ◽  
Woochul Kang
Keyword(s):  
Neural Networks ◽  
Convolutional Neural Networks ◽  
Mosquito Species ◽  
Vector Mosquito

scholarly journals Larval breeding habitats and ecological factors influence the species composition of mosquito (Diptera : Culicidae) in the parks of Dhaka city, Bangladesh

2018 ◽  
Vol 45 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Afroza Sultana ◽  
Sharmin Hasan ◽  
Mosharraf Hossain ◽  
Abdul Alim ◽  
Mohammad Al Mamun ◽  
...  
Keyword(s):  
Mosquito Control ◽  
Mosquito Species ◽  
Ecological Factors ◽  
Control Program ◽  
Breeding Habitat ◽  
Coconut Shell ◽  
Larval Abundance ◽  
Tree Hole ◽  
Breeding Habitats ◽  
Tree Holes

Mosquito larval ecology is prerequisite for determining the larval abundance and species assemblage in mosquito control program. The study explored the association of five mosquito species with their breeding habitat diversity and species distribution in three selected parks from May to October, 2015. A total of 3217 mosquito larvae were reported from six breeding habitats, namely tree hole, leaf axils, water bottle, tire, drain and coconut shell. The frequency of the three species (Ae. aegypti, Ae. albopictus and Ar. subalbatus) coexistence was higher in tree holes (82.4%) than that of the other coexisting species. Pearson Chi-square result revealed that the association of species was significantly dependent on the breeding habitats. ANOVA further suggested that mosquito density varied across habitats where among the highest density of Cx. quinquefasciatus (3.87 ± 0.22) found in drain, followed by both Ae. albopictus (2.02 ± 0.17) and Ar. subalbatus (0.50 ± 0.09) in tree holes and Ae. aegypti (1.25 ± 0.23) in coconut shell. Cx. tritaeniorhynchus occurred in drain with the least observed density (0.03 ± 0.01). CCA results suggested that Aedes species were likely preferred to oviposit in shaded habitats where pH was associated with Ae. albopictus and dissolved oxygen was with Ae. aegypti and Ar. subalbatus. Culex species were positively associated with the habitats characterizing muddy bottom and emerging vegetation but not with any of the physico-chemical parameters. These findings concluded that ecological factors influence mosquito species to favor their breeding habitats can be helpful in controlling targeted vector species as well as the mosquito borne diseases.Bangladesh J. Zool. 45(2): 111-122, 2017

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